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Publisher: John Wiley and Sons   (Total: 1583 journals)

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Showing 1 - 200 of 1583 Journals sorted alphabetically
Abacus     Hybrid Journal   (Followers: 12, SJR: 0.48, h-index: 22)
About Campus     Hybrid Journal   (Followers: 5)
Academic Emergency Medicine     Hybrid Journal   (Followers: 54, SJR: 1.385, h-index: 91)
Accounting & Finance     Hybrid Journal   (Followers: 44, SJR: 0.547, h-index: 30)
ACEP NOW     Free  
Acta Anaesthesiologica Scandinavica     Hybrid Journal   (Followers: 50, SJR: 1.02, h-index: 88)
Acta Archaeologica     Hybrid Journal   (Followers: 141, SJR: 0.101, h-index: 9)
Acta Geologica Sinica (English Edition)     Hybrid Journal   (Followers: 3, SJR: 0.552, h-index: 41)
Acta Neurologica Scandinavica     Hybrid Journal   (Followers: 5, SJR: 1.203, h-index: 74)
Acta Obstetricia et Gynecologica Scandinavica     Hybrid Journal   (Followers: 15, SJR: 1.197, h-index: 81)
Acta Ophthalmologica     Hybrid Journal   (Followers: 5, SJR: 0.112, h-index: 1)
Acta Paediatrica     Hybrid Journal   (Followers: 54, SJR: 0.794, h-index: 88)
Acta Physiologica     Hybrid Journal   (Followers: 7, SJR: 1.69, h-index: 88)
Acta Polymerica     Hybrid Journal   (Followers: 9)
Acta Psychiatrica Scandinavica     Hybrid Journal   (Followers: 35, SJR: 2.518, h-index: 113)
Acta Zoologica     Hybrid Journal   (Followers: 5, SJR: 0.459, h-index: 29)
Acute Medicine & Surgery     Hybrid Journal   (Followers: 2)
Addiction     Hybrid Journal   (Followers: 32, SJR: 2.086, h-index: 143)
Addiction Biology     Hybrid Journal   (Followers: 11, SJR: 2.091, h-index: 57)
Adultspan J.     Hybrid Journal   (SJR: 0.127, h-index: 4)
Advanced Energy Materials     Hybrid Journal   (Followers: 24, SJR: 6.411, h-index: 86)
Advanced Engineering Materials     Hybrid Journal   (Followers: 25, SJR: 0.81, h-index: 81)
Advanced Functional Materials     Hybrid Journal   (Followers: 49, SJR: 5.21, h-index: 203)
Advanced Healthcare Materials     Hybrid Journal   (Followers: 13, SJR: 0.232, h-index: 7)
Advanced Materials     Hybrid Journal   (Followers: 253, SJR: 9.021, h-index: 345)
Advanced Materials Interfaces     Hybrid Journal   (Followers: 6, SJR: 1.177, h-index: 10)
Advanced Optical Materials     Hybrid Journal   (Followers: 5, SJR: 2.488, h-index: 21)
Advanced Science     Open Access   (Followers: 4)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 17, SJR: 2.729, h-index: 121)
Advances in Polymer Technology     Hybrid Journal   (Followers: 13, SJR: 0.344, h-index: 31)
Africa Confidential     Hybrid Journal   (Followers: 19)
Africa Research Bulletin: Economic, Financial and Technical Series     Hybrid Journal   (Followers: 12)
Africa Research Bulletin: Political, Social and Cultural Series     Hybrid Journal   (Followers: 9)
African Development Review     Hybrid Journal   (Followers: 33, SJR: 0.275, h-index: 17)
African J. of Ecology     Hybrid Journal   (Followers: 14, SJR: 0.477, h-index: 39)
Aggressive Behavior     Hybrid Journal   (Followers: 15, SJR: 1.391, h-index: 66)
Aging Cell     Open Access   (Followers: 9, SJR: 4.374, h-index: 95)
Agribusiness : an Intl. J.     Hybrid Journal   (Followers: 6, SJR: 0.627, h-index: 14)
Agricultural and Forest Entomology     Hybrid Journal   (Followers: 14, SJR: 0.925, h-index: 43)
Agricultural Economics     Hybrid Journal   (Followers: 44, SJR: 1.099, h-index: 51)
AIChE J.     Hybrid Journal   (Followers: 29, SJR: 1.122, h-index: 120)
Alcoholism and Drug Abuse Weekly     Hybrid Journal   (Followers: 7)
Alcoholism Clinical and Experimental Research     Hybrid Journal   (Followers: 7, SJR: 1.416, h-index: 125)
Alimentary Pharmacology & Therapeutics     Hybrid Journal   (Followers: 34, SJR: 2.833, h-index: 138)
Alimentary Pharmacology & Therapeutics Symposium Series     Hybrid Journal   (Followers: 3)
Allergy     Hybrid Journal   (Followers: 49, SJR: 3.048, h-index: 129)
Alternatives to the High Cost of Litigation     Hybrid Journal   (Followers: 3)
American Anthropologist     Hybrid Journal   (Followers: 128, SJR: 0.951, h-index: 61)
American Business Law J.     Hybrid Journal   (Followers: 24, SJR: 0.205, h-index: 17)
American Ethnologist     Hybrid Journal   (Followers: 91, SJR: 2.325, h-index: 51)
American J. of Economics and Sociology     Hybrid Journal   (Followers: 28, SJR: 0.211, h-index: 26)
American J. of Hematology     Hybrid Journal   (Followers: 31, SJR: 1.761, h-index: 77)
American J. of Human Biology     Hybrid Journal   (Followers: 12, SJR: 1.018, h-index: 58)
American J. of Industrial Medicine     Hybrid Journal   (Followers: 16, SJR: 0.993, h-index: 85)
American J. of Medical Genetics Part A     Hybrid Journal   (Followers: 15, SJR: 1.115, h-index: 61)
American J. of Medical Genetics Part B: Neuropsychiatric Genetics     Hybrid Journal   (Followers: 3, SJR: 1.771, h-index: 107)
American J. of Medical Genetics Part C: Seminars in Medical Genetics     Partially Free   (Followers: 5, SJR: 2.315, h-index: 79)
American J. of Orthopsychiatry     Hybrid Journal   (Followers: 4, SJR: 0.756, h-index: 69)
American J. of Physical Anthropology     Hybrid Journal   (Followers: 36, SJR: 1.41, h-index: 88)
American J. of Political Science     Hybrid Journal   (Followers: 248, SJR: 5.101, h-index: 114)
American J. of Primatology     Hybrid Journal   (Followers: 15, SJR: 1.197, h-index: 63)
American J. of Reproductive Immunology     Hybrid Journal   (Followers: 3, SJR: 1.347, h-index: 75)
American J. of Transplantation     Hybrid Journal   (Followers: 15, SJR: 2.792, h-index: 140)
American J. on Addictions     Hybrid Journal   (Followers: 9, SJR: 0.843, h-index: 57)
Anaesthesia     Hybrid Journal   (Followers: 115, SJR: 1.404, h-index: 88)
Analyses of Social Issues and Public Policy     Hybrid Journal   (Followers: 11, SJR: 0.397, h-index: 18)
Analytic Philosophy     Hybrid Journal   (Followers: 16)
Anatomia, Histologia, Embryologia: J. of Veterinary Medicine Series C     Hybrid Journal   (Followers: 3, SJR: 0.295, h-index: 27)
Anatomical Sciences Education     Hybrid Journal   (Followers: 1, SJR: 0.633, h-index: 24)
Andrologia     Hybrid Journal   (Followers: 2, SJR: 0.528, h-index: 45)
Andrology     Hybrid Journal   (Followers: 2, SJR: 0.979, h-index: 14)
Angewandte Chemie     Hybrid Journal   (Followers: 155)
Angewandte Chemie Intl. Edition     Hybrid Journal   (Followers: 211, SJR: 6.229, h-index: 397)
Animal Conservation     Hybrid Journal   (Followers: 34, SJR: 1.576, h-index: 62)
Animal Genetics     Hybrid Journal   (Followers: 8, SJR: 0.957, h-index: 67)
Animal Science J.     Hybrid Journal   (Followers: 6, SJR: 0.569, h-index: 24)
Annalen der Physik     Hybrid Journal   (Followers: 5, SJR: 1.46, h-index: 40)
Annals of Anthropological Practice     Partially Free   (Followers: 2, SJR: 0.187, h-index: 5)
Annals of Applied Biology     Hybrid Journal   (Followers: 8, SJR: 0.816, h-index: 56)
Annals of Clinical and Translational Neurology     Open Access   (Followers: 1)
Annals of Human Genetics     Hybrid Journal   (Followers: 9, SJR: 1.191, h-index: 67)
Annals of Neurology     Hybrid Journal   (Followers: 43, SJR: 5.584, h-index: 241)
Annals of Noninvasive Electrocardiology     Hybrid Journal   (Followers: 2, SJR: 0.531, h-index: 38)
Annals of Public and Cooperative Economics     Hybrid Journal   (Followers: 9, SJR: 0.336, h-index: 23)
Annals of the New York Academy of Sciences     Hybrid Journal   (Followers: 5, SJR: 2.389, h-index: 189)
Annual Bulletin of Historical Literature     Hybrid Journal   (Followers: 12)
Annual Review of Information Science and Technology     Hybrid Journal   (Followers: 14)
Anthropology & Education Quarterly     Hybrid Journal   (Followers: 24, SJR: 0.72, h-index: 31)
Anthropology & Humanism     Hybrid Journal   (Followers: 16, SJR: 0.137, h-index: 3)
Anthropology News     Hybrid Journal   (Followers: 14)
Anthropology of Consciousness     Hybrid Journal   (Followers: 11, SJR: 0.172, h-index: 5)
Anthropology of Work Review     Hybrid Journal   (Followers: 11, SJR: 0.256, h-index: 5)
Anthropology Today     Hybrid Journal   (Followers: 93, SJR: 0.545, h-index: 15)
Antipode     Hybrid Journal   (Followers: 44, SJR: 2.212, h-index: 69)
Anz J. of Surgery     Hybrid Journal   (Followers: 6, SJR: 0.432, h-index: 59)
Anzeiger für Schädlingskunde     Hybrid Journal   (Followers: 1)
Apmis     Hybrid Journal   (Followers: 1, SJR: 0.855, h-index: 73)
Applied Cognitive Psychology     Hybrid Journal   (Followers: 67, SJR: 0.754, h-index: 69)
Applied Organometallic Chemistry     Hybrid Journal   (Followers: 7, SJR: 0.632, h-index: 58)
Applied Psychology     Hybrid Journal   (Followers: 137, SJR: 1.023, h-index: 64)
Applied Psychology: Health and Well-Being     Hybrid Journal   (Followers: 48, SJR: 0.868, h-index: 13)
Applied Stochastic Models in Business and Industry     Hybrid Journal   (Followers: 5, SJR: 0.613, h-index: 24)
Aquaculture Nutrition     Hybrid Journal   (Followers: 13, SJR: 1.025, h-index: 55)
Aquaculture Research     Hybrid Journal   (Followers: 31, SJR: 0.807, h-index: 60)
Aquatic Conservation Marine and Freshwater Ecosystems     Hybrid Journal   (Followers: 34, SJR: 1.047, h-index: 57)
Arabian Archaeology and Epigraphy     Hybrid Journal   (Followers: 11, SJR: 0.453, h-index: 11)
Archaeological Prospection     Hybrid Journal   (Followers: 12, SJR: 0.922, h-index: 21)
Archaeology in Oceania     Hybrid Journal   (Followers: 13, SJR: 0.745, h-index: 18)
Archaeometry     Hybrid Journal   (Followers: 27, SJR: 0.809, h-index: 48)
Archeological Papers of The American Anthropological Association     Hybrid Journal   (Followers: 14, SJR: 0.156, h-index: 2)
Architectural Design     Hybrid Journal   (Followers: 25, SJR: 0.261, h-index: 9)
Archiv der Pharmazie     Hybrid Journal   (Followers: 4, SJR: 0.628, h-index: 43)
Archives of Drug Information     Hybrid Journal   (Followers: 4)
Archives of Insect Biochemistry and Physiology     Hybrid Journal   (SJR: 0.768, h-index: 54)
Area     Hybrid Journal   (Followers: 12, SJR: 0.938, h-index: 57)
Art History     Hybrid Journal   (Followers: 215, SJR: 0.153, h-index: 13)
Arthritis & Rheumatology     Hybrid Journal   (Followers: 49, SJR: 1.984, h-index: 20)
Arthritis Care & Research     Hybrid Journal   (Followers: 28, SJR: 2.256, h-index: 114)
Artificial Organs     Hybrid Journal   (Followers: 1, SJR: 0.872, h-index: 60)
ASHE Higher Education Reports     Hybrid Journal   (Followers: 14)
Asia & the Pacific Policy Studies     Open Access   (Followers: 14)
Asia Pacific J. of Human Resources     Hybrid Journal   (Followers: 311, SJR: 0.494, h-index: 19)
Asia Pacific Viewpoint     Hybrid Journal   (SJR: 0.616, h-index: 26)
Asia-Pacific J. of Chemical Engineering     Hybrid Journal   (Followers: 7, SJR: 0.345, h-index: 20)
Asia-pacific J. of Clinical Oncology     Hybrid Journal   (Followers: 6, SJR: 0.554, h-index: 14)
Asia-Pacific J. of Financial Studies     Hybrid Journal   (SJR: 0.241, h-index: 7)
Asia-Pacific Psychiatry     Hybrid Journal   (Followers: 3, SJR: 0.377, h-index: 7)
Asian Economic J.     Hybrid Journal   (Followers: 8, SJR: 0.234, h-index: 21)
Asian Economic Policy Review     Hybrid Journal   (Followers: 3, SJR: 0.196, h-index: 12)
Asian J. of Control     Hybrid Journal   (SJR: 0.862, h-index: 34)
Asian J. of Endoscopic Surgery     Hybrid Journal   (SJR: 0.394, h-index: 7)
Asian J. of Organic Chemistry     Hybrid Journal   (Followers: 4, SJR: 1.443, h-index: 19)
Asian J. of Social Psychology     Hybrid Journal   (Followers: 5, SJR: 0.665, h-index: 37)
Asian Politics and Policy     Hybrid Journal   (Followers: 13, SJR: 0.207, h-index: 7)
Asian Social Work and Policy Review     Hybrid Journal   (Followers: 5, SJR: 0.318, h-index: 5)
Asian-pacific Economic Literature     Hybrid Journal   (Followers: 5, SJR: 0.168, h-index: 15)
Assessment Update     Hybrid Journal   (Followers: 4)
Astronomische Nachrichten     Hybrid Journal   (Followers: 2, SJR: 0.701, h-index: 40)
Atmospheric Science Letters     Open Access   (Followers: 29, SJR: 1.332, h-index: 27)
Austral Ecology     Hybrid Journal   (Followers: 12, SJR: 1.095, h-index: 66)
Austral Entomology     Hybrid Journal   (Followers: 10, SJR: 0.524, h-index: 28)
Australasian J. of Dermatology     Hybrid Journal   (Followers: 8, SJR: 0.714, h-index: 40)
Australasian J. On Ageing     Hybrid Journal   (Followers: 7, SJR: 0.39, h-index: 22)
Australian & New Zealand J. of Statistics     Hybrid Journal   (Followers: 13, SJR: 0.275, h-index: 28)
Australian Accounting Review     Hybrid Journal   (Followers: 4, SJR: 0.709, h-index: 14)
Australian and New Zealand J. of Family Therapy (ANZJFT)     Hybrid Journal   (Followers: 3, SJR: 0.382, h-index: 12)
Australian and New Zealand J. of Obstetrics and Gynaecology     Hybrid Journal   (Followers: 43, SJR: 0.814, h-index: 49)
Australian and New Zealand J. of Public Health     Hybrid Journal   (Followers: 11, SJR: 0.82, h-index: 62)
Australian Dental J.     Hybrid Journal   (Followers: 6, SJR: 0.482, h-index: 46)
Australian Economic History Review     Hybrid Journal   (Followers: 4, SJR: 0.171, h-index: 12)
Australian Economic Papers     Hybrid Journal   (Followers: 22, SJR: 0.23, h-index: 9)
Australian Economic Review     Hybrid Journal   (Followers: 6, SJR: 0.357, h-index: 21)
Australian Endodontic J.     Hybrid Journal   (Followers: 3, SJR: 0.513, h-index: 24)
Australian J. of Agricultural and Resource Economics     Hybrid Journal   (Followers: 3, SJR: 0.765, h-index: 36)
Australian J. of Grape and Wine Research     Hybrid Journal   (Followers: 5, SJR: 0.879, h-index: 56)
Australian J. of Politics & History     Hybrid Journal   (Followers: 13, SJR: 0.203, h-index: 14)
Australian J. of Psychology     Hybrid Journal   (Followers: 17, SJR: 0.384, h-index: 30)
Australian J. of Public Administration     Hybrid Journal   (Followers: 381, SJR: 0.418, h-index: 29)
Australian J. of Rural Health     Hybrid Journal   (Followers: 4, SJR: 0.43, h-index: 34)
Australian Occupational Therapy J.     Hybrid Journal   (Followers: 66, SJR: 0.59, h-index: 29)
Australian Psychologist     Hybrid Journal   (Followers: 11, SJR: 0.331, h-index: 31)
Australian Veterinary J.     Hybrid Journal   (Followers: 19, SJR: 0.459, h-index: 45)
Autism Research     Hybrid Journal   (Followers: 31, SJR: 2.126, h-index: 39)
Autonomic & Autacoid Pharmacology     Hybrid Journal   (SJR: 0.371, h-index: 29)
Banks in Insurance Report     Hybrid Journal   (Followers: 1)
Basic & Clinical Pharmacology & Toxicology     Hybrid Journal   (Followers: 10, SJR: 0.539, h-index: 70)
Basic and Applied Pathology     Open Access   (Followers: 2, SJR: 0.113, h-index: 4)
Basin Research     Hybrid Journal   (Followers: 3, SJR: 1.54, h-index: 60)
Bauphysik     Hybrid Journal   (Followers: 2, SJR: 0.194, h-index: 5)
Bauregelliste A, Bauregelliste B Und Liste C     Hybrid Journal  
Bautechnik     Hybrid Journal   (Followers: 1, SJR: 0.321, h-index: 11)
Behavioral Interventions     Hybrid Journal   (Followers: 8, SJR: 0.297, h-index: 23)
Behavioral Sciences & the Law     Hybrid Journal   (Followers: 23, SJR: 0.736, h-index: 57)
Berichte Zur Wissenschaftsgeschichte     Hybrid Journal   (Followers: 9, SJR: 0.11, h-index: 5)
Beton- und Stahlbetonbau     Hybrid Journal   (Followers: 2, SJR: 0.493, h-index: 14)
Biochemistry and Molecular Biology Education     Hybrid Journal   (Followers: 6, SJR: 0.311, h-index: 26)
Bioelectromagnetics     Hybrid Journal   (Followers: 1, SJR: 0.568, h-index: 64)
Bioengineering & Translational Medicine     Open Access  
BioEssays     Hybrid Journal   (Followers: 10, SJR: 3.104, h-index: 155)
Bioethics     Hybrid Journal   (Followers: 14, SJR: 0.686, h-index: 39)
Biofuels, Bioproducts and Biorefining     Hybrid Journal   (Followers: 1, SJR: 1.725, h-index: 56)
Biological J. of the Linnean Society     Hybrid Journal   (Followers: 14, SJR: 1.172, h-index: 90)
Biological Reviews     Hybrid Journal   (Followers: 3, SJR: 6.469, h-index: 114)
Biologie in Unserer Zeit (Biuz)     Hybrid Journal   (Followers: 42, SJR: 0.12, h-index: 1)
Biology of the Cell     Full-text available via subscription   (Followers: 9, SJR: 1.812, h-index: 69)
Biomedical Chromatography     Hybrid Journal   (Followers: 6, SJR: 0.572, h-index: 49)
Biometrical J.     Hybrid Journal   (Followers: 5, SJR: 0.784, h-index: 44)
Biometrics     Hybrid Journal   (Followers: 36, SJR: 1.906, h-index: 96)
Biopharmaceutics and Drug Disposition     Hybrid Journal   (Followers: 10, SJR: 0.715, h-index: 44)
Biopolymers     Hybrid Journal   (Followers: 18, SJR: 1.199, h-index: 104)
Biotechnology and Applied Biochemistry     Hybrid Journal   (Followers: 45, SJR: 0.415, h-index: 55)
Biotechnology and Bioengineering     Hybrid Journal   (Followers: 137, SJR: 1.633, h-index: 146)
Biotechnology J.     Hybrid Journal   (Followers: 13, SJR: 1.185, h-index: 51)
Biotechnology Progress     Hybrid Journal   (Followers: 39, SJR: 0.736, h-index: 101)
Biotropica     Hybrid Journal   (Followers: 18, SJR: 1.374, h-index: 71)
Bipolar Disorders     Hybrid Journal   (Followers: 10, SJR: 2.592, h-index: 100)
Birth     Hybrid Journal   (Followers: 34, SJR: 0.763, h-index: 64)
Birth Defects Research Part A : Clinical and Molecular Teratology     Hybrid Journal   (Followers: 2, SJR: 0.727, h-index: 77)
Birth Defects Research Part B: Developmental and Reproductive Toxicology     Hybrid Journal   (Followers: 5, SJR: 0.468, h-index: 47)
Birth Defects Research Part C : Embryo Today : Reviews     Hybrid Journal   (SJR: 1.513, h-index: 55)

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Journal Cover American Journal of Medical Genetics Part A
  [SJR: 1.115]   [H-I: 61]   [15 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1552-4825 - ISSN (Online) 1552-4833
   Published by John Wiley and Sons Homepage  [1583 journals]
  • SERPINI1 pathogenic variants: An emerging cause of childhood-onset
           progressive myoclonic epilepsy
    • Authors: Emmanuelle Ranza; Stephanie Garcia-Tarodo, Konstantinos Varvagiannis, Michel Guipponi, Johannes A. Lobrinus, Armand Bottani, Ilse Kern, Mary Kurian, Marie-Pascale Pittet, Stylianos E. Antonarakis, Joel Fluss, Christian M. Korff
      Abstract: Progressive myoclonic epilepsies are rare neurodegenerative diseases with a wide spectrum of clinical presentations and genetic heterogeneity that render their diagnosis perplexing. Discovering new imputable genes has been an ongoing process in recent years. We present two pediatric cases of progressive myoclonic epilepsy with SERPINI1 pathogenic variants that lead to a severe presentation; we highlight the importance of including this gene, previously known as causing an adult-onset dementia-epilepsy syndrome, in the genetic work-up of childhood-onset progressive myoclonic epilepsies.
      PubDate: 2017-06-20T06:49:41.990891-05:
      DOI: 10.1002/ajmg.a.38317
       
  • Growth hormone excess in children with neurofibromatosis type-1 and optic
           glioma
    • Authors: Paola Cambiaso; Stefania Galassi, Melania Palmiero, Angela Mastronuzzi, Francesca Del Bufalo, Rossella Capolino, Antonella Cacchione, Paola S. Buonuomo, Michaela V. Gonfiantini, Andrea Bartuli, Marco Cappa, Marina Macchiaiolo
      Abstract: In children with neurofibromatosis type 1 (NF1) and optic pathways glioma (OPG), growth hormone (GH) excess has been rarely reported and mainly associated to central precocious puberty. The aim of our study is to evaluate the prevalence of GH excess, the association with central precocious puberty, the relation with tumor site and the evolution over time in a large cohort of children with NF1 and OPG. Sixty-four NF1 children with OPG were evaluated. Patients with stature and/or height velocity >2 SD for age were studied for GH secretion. Seven out of 64 children (10.9%) with NF1 and optic pathways glioma showed GH excess, isolated in 5 cases and associated to central precocious puberty in 2. All the children with GH excess had a tumor involving the chiasma. Children with GH excess underwent medical treatment with lanreotide and a minimum clinical/biochemical follow up of 2 years is reported. The present study demonstrates that GH excess should be considered as a relative frequent endocrine manifestation in NF1 patients, similarly to central precocious puberty. Therefore, these patients should undergo frequent accurate auxologic evaluations. On the other hand, an increase in height velocity in children with NF1, even despite normal ophthalmological exams, can suggest the presence of OPG and therefore represents an indication to perform brain MRI.
      PubDate: 2017-06-20T06:49:15.475153-05:
      DOI: 10.1002/ajmg.a.38308
       
  • Expanding the allelic disorders linked to TCTN1 to include Varadi syndrome
           (Orofaciodigital syndrome type VI)
    • Authors: Mohammad M. Al-Qattan; Ranad Shaheen, Fowzan S. Alkuraya
      Abstract: Varadi syndrome is a subtype of orofaciodigital syndrome (OFDS) that combines the typical features of OFDS and the posterior fossa features of Joubert syndrome. The only gene known to be mutated in Varadi syndrome is C5ORF42. In this report, we describe the phenotype of a patient with Varadi syndrome who is homozygous for a previously reported mutation in TCTN1 (NM_001082538.2:c.342-2A>G, p.Gly115Lysfs*8) and suggest that allelic disorders linked to TCTN1 include Varadi syndrome, in addition to Joubert syndrome and Meckel–Gruber syndrome.
      PubDate: 2017-06-20T06:49:12.505951-05:
      DOI: 10.1002/ajmg.a.38336
       
  • The importance of phase analysis in multiexon copy number variation
           detected by aCGH in autosomal recessive disorder loci
    • Authors: Madelyn A. Gillentine; Christian P. Schaaf, Ankita Patel
      Abstract: Cohen Syndrome (CS) is a rare autosomal recessive disorder caused by homozygous or compound heterozygous pathogenic variants in VPS13B, also known as COH1. Over 100 pathogenic variants in VSP13B, primarily truncations, and copy number variants, have been found in patients with CS. Here, we present an 11-month-old girl with CS caused by two multi-exonic small deletions in VSP13B in trans. Array comparative genomic hybridization has revolutionized the field of genome copy number analysis down to the exonic level, however it has its limitations. It cannot detect balanced structural variation nor determine the phase of copy number variants. Heterozygous multi-exonic copy number variation in autosomal recessive genes should be interpreted in the context of a clinical phenotype, and, if warranted, phase analysis should be performed before sequence analysis for that gene is pursued. This patient emphasizes the need of obtaining clinical information and determining the phase in multi-exonic copy number variants for accurate diagnosis and risk counseling.
      PubDate: 2017-06-20T06:49:10.279001-05:
      DOI: 10.1002/ajmg.a.38328
       
  • Dual molecular diagnosis contributes to atypical Prader–Willi
           phenotype in monozygotic twins
    • Authors: Fernanda S. Jehee; Valdirene T. de Oliveira, Juliana Gurgel-Giannetti, Rafaella X. Pietra, Fernando V. M. Rubatino, Natália V. Carobin, Gabrielle S. Vianna, Mariana L. de Freitas, Karla S. Fernandes, Beatriz S. V. Ribeiro, Hennie T. Brüggenwirth, Roza Ali-Amin, , Janson J. White, Zeynep C. Akdemir, Shalini N. Jhangiani, Richard A. Gibbs, James R. Lupski, Monica C. Varela, Célia Koiffmann, Carla Rosenberg, Cláudia M. B. Carvalho
      Abstract: We describe monozygotic twin girls with genetic variation at two separate loci resulting in a blended phenotype of Prader–Willi syndrome and Pitt–Hopkins syndrome. These girls were diagnosed in early infancy with Prader–Willi syndrome, but developed an atypical phenotype, with apparent intellectual deficiency and lack of obesity. Array-comparative genomic hybridization confirmed a de novo paternal deletion of the 15q11.2q13 region and exome sequencing identified a second mutational event in both girls, which was a novel variant c.145+1G>A affecting a TCF4 canonical splicing site inherited from the mosaic mother. RNA studies showed that the variant abolished the donor splicing site, which was accompanied by activation of an alternative non-canonical splicing-site which then predicts a premature stop codon in the following exon. Clinical re-evaluation of the twins indicated that both variants are likely contributing to the more severe phenotypic presentation. Our data show that atypical clinical presentations may actually be the expression of blended clinical phenotypes arising from independent pathogenic events at two loci.
      PubDate: 2017-06-20T06:48:47.407528-05:
      DOI: 10.1002/ajmg.a.38315
       
  • Psychiatric and cognitive characteristics of individuals with Danon
           disease (LAMP2 gene mutation)
    • Authors: Maya Yardeni; Omri Weisman, Hanna Mandel, Ronnie Weinberger, Giovanni Quarta, Joel Salazar-Mendiguchía, Pablo Garcia-Pavia, Maria José Lobato-Rodríguez, Lourdes Fajardo Simon, Freimark Dov, Michael Arad, Doron Gothelf
      Abstract: Danon disease (DD) is a rare X-linked disorder caused by loss-of-function mutations in the LAMP2 gene, which encodes lysosome-associated membrane protein. It is characterized by the triad of hypertrophic cardiomyopathy, myopathy, and intellectual disability. Whereas the molecular and pathophysiological mechanisms underlying this disorder have been previously reported and continue to be explored, the cognitive deficits and psychiatric comorbidities manifested in DD remain an understudied topic. We systematically assessed cognitive abilities and psychiatric comorbidities in 13 males and females. Most of the participants in our cohort (n = 9; 75%) had an IQ score within the normal range, while only one participant had intellectual disability. Participants’ performance on the Cognitive Neuropsychiatric Battery (CNB) showed only mildly impaired cognitive abilities in most modules, except in the executive functioning test, which was low compared to healthy controls. Of note, 69% of the participants met criteria for at least one psychiatric disorder, mainly mood and anxiety disorders, occurring alone or in combination in the same patient. The results of the present study challenge earlier reports suggesting that mental retardation is a core constituent in DD. Of importance, it underscores the need to refer Danon patients to psychiatric assessment.
      PubDate: 2017-06-19T05:21:05.602167-05:
      DOI: 10.1002/ajmg.a.38320
       
  • The immune deficiency of chromosome 22q11.2 deletion syndrome
    • Authors: Megan Morsheimer; Terri F. Brown Whitehorn, Jennifer Heimall, Kathleen E. Sullivan
      Abstract: The syndrome originally described by Dr. Angelo DiGeorge had immunodeficiency as a central component. When a 22q11.2 deletion was identified as the cause in the majority of patients with DiGeorge syndrome, the clinical features of 22q11.2 deletion syndrome became so expansive that the immunodeficiency became less prominent in our thinking about the syndrome. This review will focus on the immune system and the changes in our understanding over the past 50 years. Initially characterized as a pure defect in T cell development, we now appreciate that many of the clinical features related to the immunodeficiency are well downstream of the limitation imposed by a small thymus. Dysfunctional B cells presumed to be secondary to compromised T cell help, issues related to T cell exhaustion, and high rates of atopy and autoimmunity are aspects of management that require consideration for optimal clinical care and for designing a cogent monitoring approach. New data on atopy are presented to further demonstrate the association.
      PubDate: 2017-06-19T05:20:59.2442-05:00
      DOI: 10.1002/ajmg.a.38319
       
  • Motor performance in children with Noonan syndrome
    • Authors: Ellen A. Croonen; Marlou Essink, Ineke van der Burgt, Jos M. Draaisma, Cees Noordam, Maria W. G. Nijhuis-van der Sanden
      Abstract: Although problems with motor performance in daily life are frequently mentioned in Noonan syndrome, the motor performance profile has never been systematically investigated. The aim of this study was to examine whether a specific profile in motor performance in children with Noonan syndrome was seen using valid norm-referenced tests. The study assessed motor performance in 19 children with Noonan syndrome (12 females, mean age 9 years 4 months, range 6 years 1 month to 11 years and 11 months, SDS 1 year and 11 months). More than 60% of the parents of the children reported pain, decreased muscle strength, reduced endurance, and/or clumsiness in daily functioning. The mean standard scores on the Visual Motor Integration (VMI) test and Movement Assessment Battery for Children 2, Dutch version (MABC-2-NL) items differed significantly from the reference scores. Grip strength, muscle force, and 6 min Walking Test (6 MWT) walking distance were significantly lower, and the presence of generalized hypermobility was significantly higher. All MABC-2-NL scores (except manual dexterity) correlated significantly with almost all muscle strength tests, VMI total score, and VMI visual perception score. The 6 MWT was only significantly correlated to grip strength. This is the first study that confirms that motor performance, strength, and endurance are significantly impaired in children with Noonan syndrome. Decreased functional motor performance seems to be related to decreased visual perception and reduced muscle strength. Research on causal relationships and the effectiveness of interventions is needed. Physical and/or occupational therapy guidance should be considered to enhance participation in daily life.
      PubDate: 2017-06-19T05:20:57.383101-05:
      DOI: 10.1002/ajmg.a.38322
       
  • Development of emotional and behavioral problems in neurofibromatosis type
           1 during young childhood
    • Authors: André B. Rietman; Rianne Oostenbrink, Kimberley van Noort, Marie-Christine J. P. Franken, Coriene E. Catsman-Berrevoets, Femke K. Aarsen, Jos G. Hendriksen, Pieter F. A. de Nijs
      Abstract: This retrospective longitudinal study in young children with neurofibromatosis type 1 (NF1) aimed to identify if, and how early problems in behavior, intelligence, and language development are associated with later behavioral problems. At the first assessment at preschool age, we evaluated language skills, intelligence, and emotional and behavioral problems as reported by parents. The second assessment at school-age we evaluated intelligence, and emotional and behavioral problems as reported by parents and teachers. Association of baseline assessments with secondary assessment was evaluated using multivariable linear regression analysis. Of the 61 patients (25 males, 36 females; mean age 4;5 years [SD 1;1 years]) with NF1 who had a first assessment, 38 children (21 males, 17 females; mean age 7;11 years [SD 2;1 years]) had a second assessment after a mean period of 3;5 years. Longitudinal data on behavioral problems were collected for 23 of these children. Intelligence and language development were not associated with internalizing problems. Parent-rated internalizing behavioral problems significantly increased with age in this subgroup. Baseline internalizing problems predicted later internalizing problems (adjusted R2 = 0.33, p = 0.003). The presence of these problems at pre-school age may be predictive of internalizing problems at a later age.
      PubDate: 2017-06-19T05:20:47.61315-05:0
      DOI: 10.1002/ajmg.a.38323
       
  • Characterization of thrombosis in patients with Proteus syndrome
    • Authors: Kim M. Keppler-Noreuil; Jay N. Lozier, Julie C. Sapp, Leslie G. Biesecker
      Abstract: Patients with overgrowth and complex vascular malformation syndromes, including Proteus syndrome have an increased risk of thromboembolism. Proteus syndrome is a mosaic, progressive overgrowth disorder involving vasculature, skin, and skeleton, and caused by a somatic activating mutation in AKT1. We conducted a comprehensive review of the medical histories and hematologic evaluations of 57 patients with Proteus syndrome to identify potential risk factors for thrombosis. We found that six of ten patients, who were deceased, died secondary to deep venous thrombosis and/or pulmonary embolism. Of the remaining 47 living patients, six had thromboembolic events that all occurred postoperatively and in an affected limb. Eleven of 21 patients had an abnormal hypercoagulable panel including Factor V Leiden heterozygotes, antithrombin III deficiency, positive lupus anticoagulant, or Protein C or S deficiencies. We observed that eight of 17 patients had an abnormal D-dimer level>0.5 mcg/dl, but deep venous thromboses occurred in only four of those with D-dimer>1.0 mcg/dl. We conclude that the predisposition to thrombosis is likely to be multifaceted with risk factors including vascular malformations, immobility, surgery, additional prothrombotic factors, and possible pathophysiologic effects of the somatic AKT1 mutation on platelet function or the vascular endothelium. The D-dimer test is useful as a screen for thromboembolism, although the screening threshold may need to be adjusted for patients with this disorder. We propose developing a registry to collect D-dimer and outcome data to facilitate adjustment of the D-dimer threshold for Proteus syndrome and related disorders, including PIK3CA-Related Overgrowth Spectrum.
      PubDate: 2017-06-19T00:30:35.350523-05:
      DOI: 10.1002/ajmg.a.38311
       
  • Cover Image, Volume 173A, Number 7, July 2017
    • Authors: Jennifer M. Kalish; Leslie G. Biesecker, Frederic Brioude, Matthew A. Deardorff, Alessandra Di Cesare-Merlone, Todd Druley, Giovanni B. Ferrero, Pablo Lapunzina, Lidia Larizza, Saskia Maas, Marina Macchiaiolo, Eamonn R. Maher, Silvia Maitz, Julian A. Martinez-Agosto, Alessandro Mussa, Peter Robinson, Silvia Russo, Angelo Selicorni, Raoul C. Hennekam
      Abstract: The cover image, by Jennifer M. Kalish et al., is based on the Original Article Nomenclature and definition in asymmetric regional body overgrowth,
      DOI : 10.1002/ajmg.a.38266.
      PubDate: 2017-06-15T05:47:38.035124-05:
       
  • Variable expressivity of a likely pathogenic variant in KCNQ2 in a
           three-generation pedigree presenting with intellectual disability with
           childhood onset seizures
    • Authors: Stacy Hewson; Klajdi Puka, Saadet Mercimek-Mahmutoglu
      Abstract: KCNQ2 has been reported as a frequent cause of autosomal dominant benign familial neonatal seizures. De novo likely pathogenic variants in KCNQ2 have been described in neonatal or early infantile onset epileptic encephalopathy patients. Here, we report a three-generation family with six affected patients with a novel likely pathogenic variant (c.628C>T; p.Arg210Cys) in KCNQ2. Four family members, three adults and a child, presented with a childhood seizure onset with variability in the severity of seizures and response to treatment, intellectual disability (ID) as well as behavioral problems. The two youngest affected patients had a variable degree of global developmental delay with no seizures at their current age. This three-generation family with six affected members expands the phenotypic spectrum of KCNQ2 associated encephalopathy to KCNQ2 associated ID and or childhood onset epileptic encephalopathy. We think that KCNQ2 associated epileptic encephalopathy should be included in the differential diagnosis of childhood onset epilepsy and early onset global developmental delay, cognitive dysfunction, or ID. Furthermore, whole exome sequencing in families with ID and history of autosomal dominant inheritance pattern with or without seizures, may further broaden the phenotypic spectrum of KCNQ2 associated epileptic encephalopathy or encephalopathy.
      PubDate: 2017-06-11T10:10:22.77733-05:0
      DOI: 10.1002/ajmg.a.38281
       
  • Growth charts for Australian children with achondroplasia
    • Authors: Louise Tofts; Sandeep Das, Felicity Collins, Karen L. O. Burton
      Abstract: Achondroplasia is an autosomal dominant disorder, the most common genetic cause of short stature in humans. Reference curves for head circumference, weight, height, and BMI are needed in clinical practice but none exist for the Australian population. This study aimed to produce head circumference, height, weight, and BMI reference percentile curves for Australian children and adolescents with achondroplasia. Measurements of head circumference, height and weight taken at clinical visits were retrospectively extracted from the electronic medical record. Age was corrected for prematurity. Patients were excluded from head circumference analysis if they had significant neurosurgical complications and from the weight and BMI analysis when they had a clinical diagnosis of overweight. Measurements were available on 138 individuals (69 males and 69 females) taken between 1970 and 2015, with over 50% collected since 2005. A total of 3,352 data points were available. The LMS method was used to produce growth charts with estimated centiles (10, 25, 50, 75, and 90th) separately for males and females. For females birth weight was 3 kg (2.5–3.5 kg), birth length 48 cm (44–50 cm) and head circumference 37.5 cm (36–39 cm), adult height was 125 cm (116–132 cm), weight 42 kg (34–54 kg), and head circumference 58 cm (55.5–60.5 cm) all 50th centile (10–90th). For males birth weight was 3.5 kg (3–4 kg), length 49 cm (46–52 cm) and head circumference 38.5 cm (36–41 cm), adult height was 134 cm (125–141 cm), weight 41 kg (24.5–57 kg) and head circumference 61 cm (58–64 cm). The curves are similar to previously published reference data from the USA and have expected population wide variation from curves from an Argentinian population. Despite limitations of our curves for adolescents (12 years and older) due to data paucity, these Australian growth charts for children and adolescents with achondroplasia will be a useful reference in clinical practice.
      PubDate: 2017-06-09T11:05:42.977561-05:
      DOI: 10.1002/ajmg.a.38312
       
  • Clinical and molecular genetic characterization of two siblings with
           trisomy 2p24.3-pter and monosomy 5p14.3-pter
    • Authors: Daisuke Fukushi; Kenji Kurosawa, Yasuyo Suzuki, Kaoru Suzuki, Kenichiro Yamada, Seiji Watanabe, Kenji Yokochi, Nobuaki Wakamatsu
      Abstract: Partial trisomy 2p syndrome is occasionally associated with neural tube defects (NTDs), such as anencephaly, encephalocele, and spina bifida, in addition to common features of intellectual disability, developmental delay, and characteristic facial appearance. The 2p24 region has been reported to be associated with NTDs. Here, we report the cases of 2 siblings with trisomy 2p24.3-pter and monosomy 5p14.3-pter caused by the paternal translocation t(2;5)(p24.3;p14.3). Of the two siblings, the elder sister had spina bifida. We determined the nucleotide sequences of the chromosomal breakpoints and found that the sizes of trisomy 2p and monosomy 5p segments were 18.77 and 17.89 Mb, respectively. NTDs were present in four of seven previously reported patients with trisomy 2p and monosomy 5p as well as in one of the two patients examined in the present study. Although the monosomy 5p of the nine patients were similar in size, the two patients reported here had the smallest size of trisomy 2p. When the clinical features of the nine patients were compared to the present two patients, the elder sister had postaxial polydactyly of the left foot in addition to the characteristic facial appearance and spina bifida, indicating that these features were associated with trisomy 2p24.3-pter. To our knowledge, this is the first study on spina bifida to determine the nucleotide sequences of breakpoints for trisomy 2p24.3-pter and monosomy 5p14.3-pter. Increased gene dosages of dosage-sensitive genes or genes at the trisomy segment (2p24.3) of the presented patients could be associated with NTDs of patients with trisomy 2p.
      PubDate: 2017-06-09T11:05:38.779273-05:
      DOI: 10.1002/ajmg.a.38313
       
  • Clinical and molecular cytogenetic characterization of four unrelated
           patients carrying 2p14 microdeletions
    • Authors: Marie-Laure Mathieu; Caroline Demily, Sandra Chantot-Bastaraud, Alexandra Afenjar, Cyril Mignot, Joris Andrieux, Marion Gerard, Jaume Catala-Mora, Pierre Simon Jouk, Audrey Labalme, Patrick Edery, Damien Sanlaville, Massimiliano Rossi
      Abstract: We report the clinical and molecular cytogenetic characterization of four unrelated patients from France and Spain, carrying 2p14 microdeletions and presenting with intellectual disability and dysmorphisms. 2p14 microdeletions are very rare. Seven patients have been reported so far harboring deletions including 2p14p15 and encompassing OTX1, whose haploinsufficiency is frequently associated with genitourinary defects. To date, only one patient has been reported carrying a more proximal 2p14 microdeletion which does not include OTX1. Here, we report three further patients carrying proximal 2p14 microdeletions not including OTX1 and one patient carrying a more distal 2p14p15 microdeletion including this gene, providing new insights into the associated phenotypic spectrum. First, our study and a review of the literature showed that 3/4 patients carrying proximal 2p14 microdeletions had sensorineural hearing loss, suggesting the presence of a previously unreported deafness-causing gene in this chromosomal region. Second, one patient developed a progressive cardiomyopathy, suggesting that a cardiac follow-up should be systematically warranted even in the absence of congenital heart disease. We speculate that ACTR2 and MEIS1 might respectively play a role in the pathogenesis of the observed deafness and cardiomyopathy. Third, we observed other previously unreported features such as glaucoma, retinopathy, and mild midline abnormalities including short corpus callosum, hypospadias and anteriorly placed anus. Finally, the patient carrying a 2p14p15 deletion including OTX1 had normal kidneys and genitalia, thus confirming that OTX1 haploinsufficiency is not invariably associated with genitourinary defects. In conclusion, our study contributes significantly to delineate the phenotypic spectrum of 2p14 microdeletions.
      PubDate: 2017-06-09T11:05:32.550792-05:
      DOI: 10.1002/ajmg.a.38307
       
  • On the significance of craniosynostosis in a case of Kabuki syndrome with
           a concomitant KMT2D mutation and 3.2 Mbp de novo 10q22.3q23.1 deletion
    • Authors: Alexandra Topa; Lena Samuelsson, Lovisa Lovmar, Göran Stenman, Lars Kölby
      Abstract: Craniosynostosis has rarely been described in patients with Kabuki syndrome. We report here a boy with facial asymmetry due to combined premature synostosis of the right coronal and sagittal sutures as well as several symptoms reminiscent of Kabuki syndrome (KS). Our case supports previous observations and suggests that craniosynostosis is a part of the KS phenotype. The uniqueness of our case is the sporadic co-occurrence of two genetic disorders, that is, a de novo frameshift variant in the KMT2D gene and a de novo 3.2 Mbp 10q22.3q23.1 deletion. Our findings emphasize the importance of the initial clinical assessment of children with craniosynostosis and that genomic and monogenic disorders, such as Kabuki syndrome, should be considered among the differential diagnoses of syndromic forms of craniosynostosis.
      PubDate: 2017-06-07T05:10:22.922611-05:
      DOI: 10.1002/ajmg.a.38296
       
  • Clinical report: A patient with a late diagnosis of cerebrotendinous
           xanthomatosis and a response to treatment
    • Authors: Ahmad Alhariri; Katherine Hamilton, Vikash Oza, Kelly Cordoro, Nara L. Sobreira, Mary Malloy, Anne Slavotinek
      Abstract: Cerebrotendinous xanthomatosis (CTX) is a rare, autosomal recessive, inborn error of bile acid metabolism characterized by diarrhea in infancy, juvenile cataracts in childhood, tendon xanthomas developing in the second to third decades of life, and progressive neurologic dysfunction in adulthood. The condition is caused by mutations in the CYP27A1 gene that result in decreased production of chenodeoxycholic acid (CDCA) and elevated levels of cholestanol and bile alcohols. We present a 36-year-old male of Han ethnicity who developed xanthomas of his Achilles tendons and suffered neurocognitive declines and gait deterioration in his second decade. The diagnosis of CTX was confirmed by marked elevation of the serum cholestanol level. Sequencing of CYP27A1 showed a paternally inherited splice mutation, c.446 + 1G>T, and a maternally inherited nonsense mutation, c.808C>T, predicting p.(Arg270*). Despite the advanced disease in this patient, treatment with CDCA reduced the xanthoma size and improved his cognition and strength, and the patient made significant gains in his ambulation and coordination. We report this case to illustrate the potential benefits of therapy in patients with CTX who have advanced disease at the time of diagnosis.
      PubDate: 2017-06-07T05:10:21.221885-05:
      DOI: 10.1002/ajmg.a.38314
       
  • Co-occurrence of Jalili syndrome and muscular overgrowth
    • Authors: Anna Wawrocka; Joanna Walczak-Sztulpa, Magdalena Badura-Stronka, Michal Owecki, Przemysław Kopczynski, Ewa Mrukwa-Kominek, Anna Skorczyk-Werner, Piotr Gasperowicz, Rafal Ploski, Maciej R. Krawczynski
      Abstract: Jalili syndrome is a rare disorder inherited in an autosomal recessive pattern manifesting as a combination of cone-rod dystrophy including progressive loss of visual acuity, color blindness, photophobia, and amelogenesis imperfecta with hypoplastic, immature, or hypocalcified dental enamel. It is caused by mutations in CNNM4, which encodes the ancient conserved domain protein 4. Here we report three brothers with Jalili syndrome and muscle overgrowth of the legs. Myopathic changes were found in needle electromyography. Mutational analysis showed in all three brothers a novel likely pathogenic homozygous missense substitution in exon 1 (c.1076T>C, p.(Leu359Pro)) of CNNM4. Both parents were carriers for the variant. In order to exclude other causative variants that could modify the patients’ phenotype we performed exome sequencing and MLPA analysis of the DMD gene in Patient 1. These analyses did not identify any additional variants. Our results expand the mutational spectrum associated with Jalili syndrome and suggest that mild myopathy with muscle overgrowth of the legs could be a newly identified manifestation of the disorder.
      PubDate: 2017-06-06T10:15:31.827271-05:
      DOI: 10.1002/ajmg.a.38318
       
  • A heterozygous microdeletion of 20p12.2–3 encompassing PROKR2 and BMP2
           in a patient with congenital hypopituitarism and growth hormone deficiency
           
    • Authors: Samuel J. H. Parsons; Neville B. Wright, Emma Burkitt-Wright, Mars S. Skae, Phillip G. Murray
      Abstract: Congenital growth hormone deficiency is a rare disorder with an incidence of approximately 1 in 4,000 live births. Pituitary development is under the control of a multitude of spatiotemporally regulated signaling molecules and transcription factors. Mutations in the genes encoding these molecules can result in hypopituitarism but for the majority of children with congenital hypopituitarism, the aetiology of their disease remains unknown. The proband is a 5-year-old girl who presented with neonatal hypoglycaemia and prolonged jaundice. No definitive endocrine cause of hypoglycaemia was identified in the neonatal period. She was born of normal size at 42 weeks but demonstrated growth failure with a progressive reduction in height to −3.2 SD by age 4.5 years and failed a growth hormone stimulation test with a peak growth hormone of 4.2 mcg/L. MRI of the pituitary gland demonstrated a hypoplastic anterior lobe and ectopic posterior lobe. Array CGH demonstrated an inherited 0.2 Mb gain at 1q21.1 and a de novo 4.8 Mb heterozygous deletion at 20p12.2–3. The deletion contained 17 protein coding genes including PROKR2 and BMP2, both of which are expressed during embryological development of the pituitary gland. PROKR2 mutations have been associated with hypopituitarism but a heterozygous deletion of this gene with hypopituitarism is a novel observation. In conclusion, congenital hypopituitarism can be present in individuals with a 20p12.3 deletion, observed with incomplete penetrance. Array CGH may be a useful investigation in select cases of early onset growth hormone deficiency, and patients with deletions within this region should be evaluated for pituitary hormone deficiencies.
      PubDate: 2017-06-06T10:15:30.545219-05:
      DOI: 10.1002/ajmg.a.38306
       
  • Associated anomalies in cases with esophageal atresia
    • Authors: Claude Stoll; Yves Alembik, Beatrice Dott, Marie-Paule Roth
      Abstract: Esophageal atresia (EA) is a common type of congenital anomaly. The etiology of esophageal atresia is unclear and its pathogenesis is controversial. Infants with esophageal atresia often have other non-EA associated congenital anomalies. The purpose of this investigation was to assess the prevalence and the types of these associated anomalies in a defined population. The associated anomalies in cases with EA were collected in all livebirths, stillbirths, and terminations of pregnancy during 29 years in 387,067 consecutive births in the area covered by our population-based registry of congenital malformations. Of the 116 cases with esophageal atresia, representing a prevalence of 2.99 per 10,000, 54 (46.6%) had associated anomalies. There were 9 (7.8%) cases with chromosomal abnormalities including 6 trisomies 18, and 20 (17.2%) nonchromosomal recognized dysmorphic conditions including 12 cases with VACTERL association and 2 cases with CHARGE syndrome. Twenty five (21.6%) of the cases had multiple congenital anomalies (MCA). Anomalies in the cardiovascular, the digestive, the urogenital, the musculoskeletal, and the central nervous systems were the most common other anomalies. The anomalies associated with esophageal atresia could be classified into a recognizable malformation syndrome or pattern in 29 out of 54 cases (53.7%). This study included special strengths: each affected child was examined by a geneticist, all elective terminations were ascertained, and the surveillance for anomalies was continued until 2 years of age. In conclusion the overall prevalence of associated anomalies, which was close to one in two cases, emphasizes the need for a thorough investigation of cases with EA. A routine screening for other anomalies may be considered in infants and in fetuses with EA.
      PubDate: 2017-06-03T08:15:26.780356-05:
      DOI: 10.1002/ajmg.a.38303
       
  • Neuroradiographic findings in 22q11.2 deletion syndrome
    • Authors: Lauren A. Bohm; Tom C. Zhou, Tyler J. Mingo, Sarah L. Dugan, Richard J. Patterson, James D. Sidman, Brianne B. Roby
      Abstract: 22q11.2 deletion syndrome (22q11.2DS) is a common genetic disorder with enormous phenotypic heterogeneity. Despite the established prevalence of developmental and neuropsychiatric issues in this syndrome, its neuroanatomical correlates are not as well understood. A retrospective chart review was performed on 111 patients diagnosed with 22q11.2DS. Of the 111 patients, 24 with genetically confirmed 22q11.2 deletion and brain MRI or MRA were included in this study. The most common indications for imaging were unexplained developmental delay (6/24), seizures of unknown etiology (5/24), and unilateral weakness (3/24). More than half (13/24) of the patients had significant radiographic findings, including persistent cavum septi pellucidi and/or cavum vergae (8/24), aberrant cortical veins (6/24), polymicrogyria or cortical dysplasia (4/24), inner ear deformities (3/24), hypoplastic internal carotid artery (2/24), and hypoplastic cerebellum (1/24). These findings reveal the types and frequencies of brain malformations in this case series, and suggest that the prevalence of neuroanatomical abnormalities in 22q11.2DS may be underestimated. Understanding indications for imaging and frequently encountered brain malformations will result in early diagnosis and intervention in an effort to optimize patient outcomes.
      PubDate: 2017-06-03T08:15:23.427074-05:
      DOI: 10.1002/ajmg.a.38304
       
  • Anthropometric charts and congenital anomalies in newborns with Down
           syndrome
    • Authors: Clotilde Mircher; Jeanne Toulas, Cécile Cieuta-Walti, Isabelle Marey, Martine Conte, Laura González Briceño, Marie-Laure Tanguy, Marie-Odile Rethore, Aime Ravel
      Abstract: The objectives of this study were to obtain updated neonatal measurements in French newborns with Down Syndrome (DS) according to their gestational age, and to assess the frequency and distribution of congenital anomalies. Data on congenital malformations, birth weight, birth length and birth occipito-frontal circumference (OFC) according to the gestational age was gathered from 1,030 babies, born between 1980 and 2010. The mean gestational age was 38 weeks from the date of the last menstrual period (LMP) (range: 29–42 weeks). Repartition of complications was found to be similar to previous studies, with no difference according to the date of birth. For girls born after 37 weeks, the mean birth weight was 3,012 ± 430 g, the mean birth length was 47.7 ± 2 cm, and the mean birth OFC was 33 ± 1.4 cm. For boys born after 37 weeks, the mean birth weight was 3,103 ± 459, the mean birth length was 48.4 ± 2.2 cm, and the mean birth OFC was 33.2 ± 1.4 cm. We did not find any difference in these measurements when we compared children born before 1997 and after 2007. When compared to the general population (French data and WHO charts), newborns with DS have a more pronounced difference in their birth length and their birth OFC (15–25th) than in their birth weight (25–50th). The shape of the growth curves shows that growth velocity decreases during the last weeks of gestation in all measurements, which suggests that the modal age for delivery could be earlier in DS newborns than in the general population.
      PubDate: 2017-06-02T09:30:28.864234-05:
      DOI: 10.1002/ajmg.a.38305
       
  • A new diagnosis of Williams–Beuren syndrome in a 49-year-old man
           with severe bullous emphysema
    • Authors: Monica H. Wojcik; Nikkola Carmichael, Frederick R. Bieber, Daniel C. Wiener, Rachna Madan, Barbara R. Pober, Benjamin A. Raby
      Abstract: Williams–Beuren syndrome (WBS) is a chromosomal microdeletion syndrome typically presenting with intellectual disability, a unique personality, a characteristic facial appearance, and cardiovascular disease. Several clinical features of WBS are thought to be due to haploinsufficiency of elastin (ELN), as the ELN locus is included within the WBS critical region at 7q11.23. Emphysema, a disease attributed to destruction of pulmonary elastic fibers, has been reported in patients without WBS who have pathogenic variants in ELN but only once (in one patient) in WBS. Here we report a second adult WBS patient with emphysema where the diagnosis of WBS was established subsequent to the discovery of severe bullous emphysema. Haploinsufficiency of ELN likely contributed to this pulmonary manifestation of WBS. This case emphasizes the contribution of rare genetic variation in cases of severe emphysema and provides further evidence that emphysema should be considered in patients with WBS who have respiratory symptoms, as it may be under-recognized in this patient population.
      PubDate: 2017-06-02T07:05:53.563902-05:
      DOI: 10.1002/ajmg.a.38289
       
  • A heritable microduplication encompassing TBL1XR1 causes a genomic
           sister-disorder for the 3q26.32 microdeletion syndrome
    • Authors: Vera Riehmer; Florian Erger, Peter Herkenrath, Saskia Seland, Miriam Jackels, Alfred Wiater, Raoul Heller, Bodo B. Beck, Christian Netzer
      Abstract: Recently, a new syndrome with intellectual disability (ID) and dysmorphic features due to deletions or point mutations within the TBL1XR1 gene located in the chromosomal band 3q26.32 has been described (MRD41, OMIM 616944). One recurrent point mutation in the TBL1XR1 gene has been identified as the cause of Pierpont syndrome (OMIM 602342), a distinct intellectual disability syndrome with plantar lipomatosis. In addition, different de novo point mutations in the TBL1XR1 gene have been found in patients with autism spectrum disorders (ASD) and intellectual disability. Here, we report four patients from two unrelated families in whom array-CGH analysis and real-time quantitative PCR of genomic DNA revealed a TBL1XR1-microduplication. Adjacent genes were not affected. The microduplication occurred as a de novo event in one patient, whereas the other three cases occurred in two generations of a second, unrelated family. We compare and contrast the clinical findings in TBL1XR1 microdeletion, point mutation, and microduplication cases and expand the TBL1XR1-associated phenotypic spectrum. ID, hearing loss, and ASD are common features of TBL1XR1-associated diseases. Our clinical observations add to the increasing evidence of the role of TBL1XR1 in brain development, and they simultaneously demonstrate that different genetic disease mechanisms affecting TBL1XR1 can lead to similar ID phenotypes. The TBL1XR1-microduplication syndrome is an intellectual disability/learning disability syndrome with associated incomplete penetrance ASD, hearing loss, and delay of puberty. Its phenotypic overlap indicates that it is a genomic sister-disorder to the 3q26.32 microdeletion syndrome.
      PubDate: 2017-06-02T07:05:48.682743-05:
      DOI: 10.1002/ajmg.a.38285
       
  • A novel mutation in GMPPA in siblings with apparent intellectual
           disability, epilepsy, dysmorphism, and autonomic dysfunction
    • Authors: Wendy A. Gold; Nara Sobreira, Elsa Wiame, Alexandre Marbaix, Emile Van Schaftingen, Patricia Franzka, Lisa G. Riley, Lisa Worgan, Christian A. Hübner, John Christodoulou, Lesley C. Adès
      Abstract: GMPPA encodes the GDP-mannose pyrophosphorylase A protein (GMPPA). The function of GMPPA is not well defined, however it is a homolog of GMPPB which catalyzes the reaction that converts mannose-1-phosphate and guanosine-5′-triphosphate to GDP-mannose. Previously, biallelic mutations in GMPPA were reported to cause a disorder characterized by achalasia, alacrima, neurological deficits, and intellectual disability. In this study, we report a female proband with achalasia, alacrima, hypohydrosis, apparent intellectual disability, seizures, microcephaly, esotropia, and craniofacial dysmorphism. Exome sequencing identified a previously unreported homozygous c.853+1G>A variant in GMPPA in the proband and her affected sister. Their unaffected parents were heterozygous, and unaffected brother homozygous wild type for this variant. Lymphoblast cells from the affected sisters showed complete loss of the GMPPA protein by Western blotting, and increased levels of GDP-mannose in lymphoblasts on high performance liquid chromatography. Based on our findings and the previous report describing patients with an overlapping phenotype, we conclude that this novel variant in GMPPA, identified by exome sequencing in the proband and her affected sister, is the genetic cause of their phenotype and may expand the known phenotype of this recently described glycosylation disorder.
      PubDate: 2017-06-02T07:05:43.052341-05:
      DOI: 10.1002/ajmg.a.38292
       
  • Molecular and clinical delineation of 2p15p16.1 microdeletion syndrome
    • Authors: Jonathan Lévy; Aurélie Coussement, Céline Dupont, Fabien Guimiot, Clarisse Baumann, Géraldine Viot, Sandrine Passemard, Yline Capri, Séverine Drunat, Alain Verloes, Eva Pipiras, Brigitte Benzacken, Jean-Michel Dupont, Anne-Claude Tabet
      Abstract: Interstitial 2p15p16.1 microdeletion is a rare chromosomal syndrome previously reported in 33 patients. It is characterized by intellectual disability, developmental delay, autism spectrum disorders, microcephaly, short stature, dysmorphic features, and multiple congenital organ defects. It is defined as a contiguous gene syndrome and two critical regions have been proposed at 2p15 and 2p16.1 loci. Nevertheless, patients with deletion of both critical regions shared similar features of the phenotype and the correlation genotype–phenotype is still unclear. We review all published cases and describe three additional patients, to define the phenotype–genotype correlation more precisely. We reported on two patients including the first prenatal case described so far, carrying a 2p15 deletion affecting two genes: XPO1 and part of USP34. Both patients shared similar features including facial dysmorphism and cerebral abnormalities. We considered the genes involved in the deleted segment to further understand the abnormal phenotype. The third case we described here was a 4-year-old boy with a heterozygous de novo 427 kb deletion encompassing BCL11A and PAPOLG at 2p16.1. He displayed speech delay, autistic traits, and motor stereotypies associated with brain structure abnormalities. We discuss the contribution of the genes included in the deletion to the abnormal phenotype. Our three new patients compared to previous cases, highlighted that despite two critical regions, both distal deletion at 2p16.1 and proximal deletion at 2p15 are associated with phenotypes that are very close to each other. Finally, we also discuss the genetic counseling of this microdeletion syndrome particularly in the course of prenatal diagnosis.
      PubDate: 2017-06-01T22:16:21.418073-05:
      DOI: 10.1002/ajmg.a.38302
       
  • Auditory and otologic profile of Alström syndrome: Comprehensive single
           center data on 38 patients
    • Authors: Spencer Lindsey; Carmen Brewer, Olga Stakhovskaya, Hung Jeffrey Kim, Chris Zalewski, Joy Bryant, Kelly A. King, Jürgen K. Naggert, William A. Gahl, Jan D. Marshall, Meral Gunay-Aygun
      Abstract: Alström syndrome (AS) is a rare autosomal recessive ciliopathy caused by mutations in the ALMS1 gene. Hallmark characteristics include childhood onset of severe retinal degeneration, sensorineural hearing loss, obesity, insulin-resistant diabetes, and cardiomyopathy. Here we comprehensively characterize the auditory and otologic manifestations in a prospective case series of 38 individuals, aged 1.7–37.9 years, with genetically confirmed AS. Hearing loss was preceded by retinal dystrophy in all cases, and had an average age of detection of 7.45 years (range 1.5–15). Audiometric assessments showed mean pure tone averages (0.5, 1, 2, 4 kHz) of 48.6 and 47.5 dB HL in the right and left ears, respectively. Hearing was within normal limits for only 8/74 ears (11%). For the 66 ears with hearing loss, the degree was mild (12%), moderate (54%), or severe (8%). Type of hearing loss was predominantly sensorineural (77%), while three ears had mixed loss, no ears had conductive loss, and type of hearing loss was indeterminate for the remaining 12 ears. Serial audiograms available for 33 patients showed hearing loss progression of approximately 10–15 dB/decade. Our data show that hearing loss associated with AS begins in childhood and is a predominantly symmetric, sensory hearing loss that may progress to a severe degree. Absent otoacoustic emissions, intact speech discrimination, and disproportionately normal auditory brainstem responses suggest an outer hair cell site of lesion. These findings indicate that individuals with AS would benefit from sound amplification and if necessary, cochlear implantation.
      PubDate: 2017-06-01T22:16:15.078227-05:
      DOI: 10.1002/ajmg.a.38316
       
  • Phenotypes and genotypes in individuals with SMC1A variants
    • Authors: Sylvia Huisman; Paul A. Mulder, Egbert Redeker, Ingrid Bader, Anne-Marie Bisgaard, Alice Brooks, Anna Cereda, Constanza Cinca, Dinah Clark, Valerie Cormier-Daire, Matthew A. Deardorff, Karin Diderich, Mariet Elting, Anthonie van Essen, David FitzPatrick, Cristina Gervasini, Gabriele Gillessen-Kaesbach, Katta M. Girisha, Yvonne Hilhorst-Hofstee, Saskia Hopman, Denise Horn, Mala Isrie, Sandra Jansen, Cathrine Jespersgaard, Frank J. Kaiser, Maninder Kaur, Tjitske Kleefstra, Ian D. Krantz, Phillis Lakeman, Annemiek Landlust, Davor Lessel, Caroline Michot, Jo Moss, Sarah E. Noon, Chris Oliver, Ilaria Parenti, Juan Pie, Feliciano J. Ramos, Claudine Rieubland, Silvia Russo, Angelo Selicorni, Zeynep Tümer, Rieneke Vorstenbosch, Tara L. Wenger, Ingrid van Balkom, Sigrid Piening, Jolanta Wierzba, Raoul C. Hennekam
      Abstract: SMC1A encodes one of the proteins of the cohesin complex. SMC1A variants are known to cause a phenotype resembling Cornelia de Lange syndrome (CdLS). Exome sequencing has allowed recognizing SMC1A variants in individuals with encephalopathy with epilepsy who do not resemble CdLS. We performed an international, interdisciplinary study on 51 individuals with SMC1A variants for physical and behavioral characteristics, and compare results to those in 67 individuals with NIPBL variants. For the Netherlands all known individuals with SMC1A variants were studied, both with and without CdLS phenotype. Individuals with SMC1A variants can resemble CdLS, but manifestations are less marked compared to individuals with NIPBL variants: growth is less disturbed, facial signs are less marked (except for periocular signs and thin upper vermillion), there are no major limb anomalies, and they have a higher level of cognitive and adaptive functioning. Self-injurious behavior is more frequent and more severe in the NIPBL group. In the Dutch group 5 of 13 individuals (all females) had a phenotype that shows a remarkable resemblance to Rett syndrome: epileptic encephalopathy, severe or profound intellectual disability, stereotypic movements, and (in some) regression. Their missense, nonsense, and frameshift mutations are evenly spread over the gene. We conclude that SMC1A variants can result in a phenotype resembling CdLS and a phenotype resembling Rett syndrome. Resemblances between the SMC1A group and the NIPBL group suggest that a disturbed cohesin function contributes to the phenotype, but differences between these groups may also be explained by other underlying mechanisms such as moonlighting of the cohesin genes.
      PubDate: 2017-05-26T07:40:43.373953-05:
      DOI: 10.1002/ajmg.a.38279
       
  • Presynaptic congenital myasthenic syndrome with a homozygous sequence
           variant in LAMA5 combines myopia, facial tics, and failure of
           neuromuscular transmission
    • Authors: Ricardo A. Maselli; Juan Arredondo, Jessica Vázquez, Jessica X. Chong, , Michael J. Bamshad, Deborah A. Nickerson, Marian Lara, Fiona Ng, Victoria L. Lo, Peter Pytel, Craig M. McDonald
      Abstract: Defects in genes encoding the isoforms of the laminin alpha subunit have been linked to various phenotypic manifestations, including brain malformations, muscular dystrophy, ocular defects, cardiomyopathy, and skin abnormalities. We report here a severe defect of neuromuscular transmission in a consanguineous patient with a homozygous variant in the laminin alpha-5 subunit gene (LAMA5). The variant c.8046C>T (p.Arg2659Trp) is rare and has a predicted deleterious effect. The affected individual, who also carries a rare homozygous sequence variant in LAMA1, had muscle weakness, myopia, and facial tics. Magnetic resonance imaging of brain showed mild volume loss and periventricular T2 prolongation. Repetitive nerve stimulation revealed 50% decrement of compound muscle action potential amplitudes and 250% facilitation immediately after exercise, Endplate studies identified a profound reduction of the endplate potential quantal content and endplates with normal postsynaptic folding that were denuded or partially occupied by small nerve terminals. Expression studies revealed that p.Arg2659Trp caused decreased binding of laminin alpha-5 to SV2A and impaired laminin-521 cell-adhesion and cell projection support in primary neuronal cultures. In summary, this report describing severe neuromuscular transmission failure in a patient with a LAMA5 mutation expands the list of phenotypes associated with defects in genes encoding alpha-laminins.
      PubDate: 2017-05-25T07:25:45.163113-05:
      DOI: 10.1002/ajmg.a.38291
       
  • A tumor profile in Patau syndrome (trisomy 13)
    • Authors: Daniel Satgé; Motoi Nishi, Nicolas Sirvent, Michel Vekemans, Marie-Pierre Chenard, Ann Barnes
      Abstract: Individuals with trisomic conditions like Down syndrome and Edwards syndrome are prone to certain types of malignancy. However, for Patau syndrome (constitutional trisomy 13), which occurs in 1/10,000–1/20,000 live births, the tumor profile has not been well characterized. An awareness of susceptibility to malignancies can improve care of affected individuals, as well as further our understanding of the contribution of trisomy to carcinogenesis. Therefore, we conducted an extensive review of the literature; we found 17 malignancies reported in individuals with Patau syndrome. These comprised eight embryonic tumors, three leukemias, two malignant germ cell tumors, two carcinomas, a malignant brain tumor, and a sarcoma. Benign tumors were mainly extragonadal teratomas. The small number of reported malignant tumors suggests that there is not an increased risk of cancer in the context of trisomy 13. The tumor profile in Patau syndrome differs from that observed in Edwards syndrome (trisomy 18) and Down syndrome (trisomy 21), suggesting that the supernumerary chromosome 13 could promote particular tumor formations as it does particular malformations. No general and direct relationships of tumor occurrence with organ weight, congenital malformations, histological changes, or presence of tumor suppressor genes on chromosome 13 were observed. However, some tumors were found in tissues whose growth and development are controlled by genes mapping to chromosome 13. Recent reports of successful outcomes following surgical treatment and adapted chemotherapy indicate that treatment of cancer is possible in Patau syndrome.
      PubDate: 2017-05-25T07:25:42.687639-05:
      DOI: 10.1002/ajmg.a.38294
       
  • 4.7 Mb deletion encompassing TGFB2 associated with features of
           Loeys–Dietz syndrome and osteoporosis in adulthood
    • Authors: Harald Gaspar; Bernd Lutz, Kerstin Reicherter, Simon Lühl, Rita Taurman, Heinz Gabriel, Rolf E. Brenner, Guntram Borck
      PubDate: 2017-05-25T07:25:30.331532-05:
      DOI: 10.1002/ajmg.a.38286
       
  • Correspondence to Gripp et al. nephroblastomatosis or Wilms tumor in a
           fourth patient with a somatic PIK3CA mutation
    • Authors: Floor A. M. Postema; Saskia M. J. Hopman, Matthew A. Deardorff, Johannes H. M. Merks, Raoul C. Hennekam
      PubDate: 2017-05-24T09:15:23.146703-05:
      DOI: 10.1002/ajmg.a.38290
       
  • A mutation in GABRB3 associated with Dravet syndrome
    • Authors: Sy Vinh Le; Phan Hoang Truc Le, Thi Khanh Van Le, Thi Thuy Kieu Huynh, Thi Thu Hang Do
      Abstract: Dravet syndrome is a rare and severe type of epilepsy in infants. Approximately, 70–80% of patients with Dravet syndrome have mutations in SCN1A, the gene encoding the alpha-1 subunit of the sodium channel, while some simplex patients have variants in one of several other genes, including but not limited to GABRA1, SCN2A, STXBP1, GABRG2, and SCN1B. In this study, we performed exome sequencing in six patients with SCN1A-negative Dravet syndrome to identify other genes related to this disorder. In one affected individual, we detected a novel de novo heterozygous missense variant, c.695G>A, p.(Arg232Gln), in GABRB3, the gene encoding the β3-subunit of the gamma-aminobutyric acid type A (GABAA) receptor, which mediates inhibitory signaling within the central nervous system. In summary, the data in this study identify GABRB3 as a candidate gene for Dravet syndrome.
      PubDate: 2017-05-24T00:49:04.156321-05:
      DOI: 10.1002/ajmg.a.38282
       
  • 37th Annual David W. Smith Workshop on Malformations and Morphogenesis:
           Abstracts of the 2016 Annual Meeting
    • Authors: Kim M. Keppler-Noreuil; Julian A. Martinez-Agosto, Louanne Hudgins, John C. Carey
      Abstract: The 37th Annual David W. Smith Workshop on Malformations and Morphogenesis occurred on September 9th–14th, 2016 at the University of California—Los Angeles Conference Center in Lake Arrowhead, CA. The Workshop, which honors the legacy of David W. Smith, brought together clinicians and researchers interested in congenital malformations and their underlying mechanisms of morphogenesis. The Workshop highlighted five themes besides mechanisms of morphogenesis and New Syndromes: Neural Crestopathies, Mosaicism, Disorders of Skin Pigmentation, Therapies, and Ear Malformations and Hearing Loss. This Conference Report includes the abstracts presented at the 2016 Workshop.
      PubDate: 2017-05-24T00:49:00.747551-05:
      DOI: 10.1002/ajmg.a.38229
       
  • Discordant phenotypes in monozygotic twins with 16p11.2 microdeletions
           including the SH2B1 gene
    • Authors: Lin Li; Linhuan Huang, Shaobin Lin, Yanmin Luo, Qun Fang
      Abstract: A 200∼240 kb SH2B1-containing deletion region on 16p11.2 is associated with early-onset obesity and developmental delay. Here, we describe monozygotic twin brothers with discordant clinical presentations. Intrauterine fetal growth restriction was present in both twins. Additionally, twin A exhibited coarctation of aorta, left ventricular noncompaction, atrial septal defect, pericardial effusion, left hydronephrosis, and moderate developmental delay, whereas twin B exhibited single umbilical artery. Chromosome microarray analysis was performed on both twins and their parents. An identical 244 kb microdeletion on 16p11.2 including 9 Refseq genes, including SH2B1, was identified in the twins. The novel findings in monozygotic twins may expand the phenotypic spectrum of 16p11.2 microdeletion. Further studies are needed to strengthen the correlation between genotypes and abnormal clinical features.
      PubDate: 2017-05-24T00:48:57.060141-05:
      DOI: 10.1002/ajmg.a.38284
       
  • Obstructive sleep apnea in Down syndrome: Benefits of surgery and
           noninvasive respiratory support
    • Authors: Benjamin Dudoignon; Alessandro Amaddeo, Annick Frapin, Briac Thierry, Livio de Sanctis, Jorge Olmo Arroyo, Sonia Khirani, Brigitte Fauroux
      Abstract: Children with Down syndrome are at increased risk of obstructive sleep apnea (OSA). The aim of the study was to describe the management of OSA in a large cohort of children with Down syndrome. A retrospective analysis of sleep studies and consequent management was performed for all consecutive Down syndrome patients evaluated between September 2013 and April 2016. The data of 57 patients were analyzed: 51/53 had an interpretable overnight polygraphy and 4 the recording of nocturnal gas exchange. Mean age at baseline sleep study was 6.2 ± 5.9 years. Eighteen patients (32%) had prior upper airway surgery. Mean apnea-hypopnea index (AHI) was 14 ± 16 events/hr with 41 of the 51 (80%) patients having OSA with an AHI >1 event/hr and 20 patients (39%) having an AHI ≥10 events/hr. Consequently, eight patients (14%) had upper airway surgery. OSA improved in all patients except two who needed noninvasive respiratory support. Nineteen (33%) patients required noninvasive respiratory support. Mean age at noninvasive respiratory support initiation was 7 ± 7 years. On 11 patients with objective adherence data available, mean compliance at 2 ± 1 years of treatment was excellent with an average use per night of 8 hr46 ± 3 hr59 and 9 patients using the noninvasive respiratory support >4 hr/night. Noninvasive respiratory support was associated with an improvement of nocturnal gas exchange. The prevalence of OSA is high in Down syndrome. Upper airway surgery is not always able to correct OSA. Noninvasive respiratory support represents then an effective treatment for OSA and good compliance may be achieved in a majority of patients.
      PubDate: 2017-05-24T00:48:43.294465-05:
      DOI: 10.1002/ajmg.a.38283
       
  • Haploinsufficiency of NR4A2 is associated with a neurodevelopmental
           phenotype with prominent language impairment
    • Authors: Miriam S. Reuter; Mandy Krumbiegel, Gregor Schlüter, Arif B. Ekici, André Reis, Christiane Zweier
      Abstract: Non-recurrent deletions in 2q24.1, minimally overlapping two genes, NR4A2 and GPD2, were recently described in individuals with language impairment and behavioral and cognitive symptoms. We herewith report on a female patient with a similar phenotype of severe language and mild cognitive impairment, in whom we identified a de novo deletion covering only NR4A2. NR4A2 encodes a transcription factor highly expressed in brain regions critical for speech and language and implicated in dopaminergic neuronal development. Our findings of a de novo deletion of NR4A2 in an individual with mild intellectual disability and prominent speech and language impairment provides further evidence for NR4A2 haploinsufficiency being causative for neurodevelopmental and particularly language phenotypes.
      PubDate: 2017-05-24T00:48:40.849187-05:
      DOI: 10.1002/ajmg.a.38288
       
  • A novel variant in MED12 gene: Further delineation of phenotype
    • Authors: Dhanya L. Narayanan; Shubha R. Phadke
      Abstract: MED12 is a multiprotein mediator complex, which has a role in cell growth and differentiation and has been implicated in three distinct X-linked intellectual disability syndromes with distinctive clinical features. These include Opitz–Kaveggia syndrome (FG syndrome), Lujan syndrome, and X-linked Ohdo syndrome. Recently MED12 variants have been implicated in isolated X-linked intellectual disability. We describe a 5-year-old male patient with intellectual disability and facial dysmorphism and a novel variant in MED12 gene identified by Whole Exome Sequencing. His dysmorphic facial features are distinct from the previously described phenotypes. With a strong genotype–phenotype correlation that is already known for MED12, this could be a new phenotype linked to MED12, thus expanding the phenotypic spectrum of MED12-related disorders.
      PubDate: 2017-05-23T06:40:33.116977-05:
      DOI: 10.1002/ajmg.a.38295
       
  • Renal anomalies and lymphedema distichiasis syndrome. A rare
           association'
    • Authors: Gabriela E. Jones; Anna K. Richmond, Osric Navti, Hatem A. Mousa, Stephen Abbs, Edward Thompson, Sahar Mansour, Pradeep C. Vasudevan
      Abstract: Lymphedema distichiasis syndrome (LDS) is a rare, autosomal dominant genetic condition, characterized by lower limb lymphedema and distichiasis. Other associated features that have been reported include varicose veins, cleft palate, congenital heart defects, and ptosis. We update a previously reported family with a pathogenic variant in FOXC2 (c.412-413insT) where five affected individuals from the youngest generation had congenital renal anomalies detected on prenatal ultrasound scan. These included four fetuses with hydronephrosis and one with bilateral renal agenesis. A further child with LDS had prominence of the left renal pelvis on postnatal renal ultrasound. We also describe a second family in whom the proband and his affected son had congenital renal anomalies; left ectopic kidney, right duplex kidney, and bilateral duplex collecting systems with partial duplex kidney with mild degree of malrotation, respectively. Foxc2 is expressed in the developing kidney and therefore congenital renal anomalies may well be associated, potentially as a low penetrance feature. We propose that all individuals diagnosed with LDS should have a baseline renal ultrasound scan at diagnosis. It would also be important to consider the possibility of renal anomalies during prenatal ultrasound of at risk pregnancies, and that the presence of hydronephrosis may be an indication that the baby is affected with LDS.
      PubDate: 2017-05-23T06:40:23.722668-05:
      DOI: 10.1002/ajmg.a.38293
       
  • CMIP haploinsufficiency in two patients with autism spectrum disorder and
           co-occurring gastrointestinal issues
    • Authors: Minjie Luo; Jinbo Fan, Tara L. Wenger, Margaret H. Harr, Melissa Racobaldo, Surabhi Mulchandani, Holly Dubbs, Elaine H. Zackai, Nancy B. Spinner, Laura K. Conlin
      Abstract: Autism spectrum disorder (ASD) is a genetically heterogeneous group of disorders characterized by impairments in social communication and restricted interests. Though some patients with ASD have an identifiable genetic cause, the cause of most ASD remains elusive. Many ASD susceptibility loci have been identified through clinical studies. We report two patients with syndromic ASD and persistent gastrointestinal issues who carry de novo deletions involving the CMIP gene detected by genome-wide SNP microarray and fluorescence in situ hybridization (FISH) analysis. Patient 1 has a 517 kb deletion within 16q23.2q23.3 including the entire CMIP gene. Patient 2 has a 1.59 Mb deletion within 16q23.2q23.3 that includes partial deletion of CMIP in addition to 12 other genes, none of which have a known connection to ASD or other clinical phenotypes. The deletion of CMIP is rare in general population and was not found among a reference cohort of approximately 12,000 patients studied in our laboratory who underwent SNP array analysis for various indications. A 280 kb de novo deletion containing the first 3 exons of CMIP was reported in one patient who also demonstrated ASD and developmental delay. CMIP has previously been identified as a susceptibility locus for specific language impairment (SLI). It is notable that both patients in this study had significant gastrointestinal issues requiring enteral feedings, which is unusual for patients with ASD, in addition to unusually elevated birth length, further supporting a shared causative gene. These findings suggest that CMIP haploinsufficiency is the likely cause of syndromic ASD in our patients.
      PubDate: 2017-05-15T06:51:14.153168-05:
      DOI: 10.1002/ajmg.a.38277
       
  • Endoplasmic reticulum retention of xylosyltransferase 1 (XYLT1) mutants
           underlying Desbuquois dysplasia type II
    • Authors: Nesreen K. Al-Jezawi; Bassam R. Ali, Lihadh Al-Gazali
      Abstract: Desbuquois syndrome is a heterogeneous rare type of skeletal dysplasia with a prevalence of less than 1 in 1,000,000 individuals. It is characterized by short-limbed dwarfism, dysmorphic facial features, and severe joint laxity. Two types have been recognized depending on the presence of distinctive carpal and phalangeal features. Mutations in the calcium activated nucleotidase 1 (CANT1) have been found to be responsible for type I and lately, for the Kim type of Desbuquois dysplasia. In addition, a number of Desbuquois dysplasia type II patients have been attributed to mutations in xylosyltransferase 1, encoded by the XYLT1 gene, an enzyme that catalyzes the transfer of UDP-xylose (a marker of cartilage destruction) to serine residues of an acceptor protein, essential for the biosynthesis of proteoglycans. We report here a patient with features consistent with Desbuquois dysplasia II including short long bones, flat face, mild monkey wrench appearance of the femoral heads. Whole exome sequencing revealed a novel homozygous duplication of a single nucleotide in XYLT1 gene (c.2169dupA). This variant is predicted to result in a frame-shift and stop codon p.(Val724Serfs*10) within the xylosyltransferase catalytic domain. Immunoflourescence staining of HeLa cells transfected with mutated XYLT1 plasmids constructs of the current as well as the previously reported missense mutations (c.1441C>T, p.(Arg481Trp) and c.1792C>T, p.(Arg598Cys)), revealed aberrant subcellular localization of the enzyme compared to wild-type, suggesting endoplasmic reticulum retention of these mutants as the likely mechanism of disease.
      PubDate: 2017-04-30T02:04:24.327945-05:
      DOI: 10.1002/ajmg.a.38244
       
  • Alterations in metabolic patterns have a key role in diagnosis and
           progression of primrose syndrome
    • Authors: Alberto Casertano; Paolo Fontana, Raoul C. Hennekam, Marco Tartaglia, Rita Genesio, Tina Barbaro Dieber, Lucia Ortega, Lucio Nitsch, Daniela Melis
      Abstract: Primrose syndrome is characterized by unusual facial features, macrocephaly, intellectual disability, enlarged, and calcified external ears, sparse body hair, and distal muscle wasting. Nine patients have been described in the literature. The disorder is due to missense mutations in ZBTB20. Here we describe one newly diagnosed 18-month-old patient and provide 10 year follow-up of an earlier reported patient, highlighting the progression and complexity of the disorder. Metabolic studies showed reduced glucose tolerance with prevalence of amino acids and fatty acids catabolism, ketogenesis, and gluconeogenesis, resulting in a Krebs cycle reversion.
      PubDate: 2017-04-30T02:04:20.241328-05:
      DOI: 10.1002/ajmg.a.38124
       
  • KBG syndrome: An Australian experience
    • Authors: Natalia Murray; Bronwyn Burgess, Robin Hay, Alison Colley, Sulekha Rajagopalan, Julie McGaughran, Chirag Patel, Annabelle Enriquez, Linda Goodwin, Zornitza Stark, Tiong Tan, Meredith Wilson, Tony Roscioli, Mustafa Tekin, Himanshu Goel
      Abstract: In 2011, heterozygous mutations in the ANKRD11 gene were identified in patients with KBG syndrome. Since then, 100 cases have been described with the expansion of the clinical phenotype. Here we present 18 KBG affected individuals from 13 unrelated families, 16 with pathogenic mutations in the ANKRD11 gene. Consistent features included intellectual disability, macrodontia, and the characteristic broad forehead with hypertelorism, and a prominent nasal bridge. Common features included hand anomalies, cryptorchidism, and a large number of palate abnormalities. Distinctive findings in this series included malrotation of the abdominal viscera, bilateral inguinal herniae in two patients, basal ganglia calcification and the finding of osteopenia in three patients. Nine novel heterozygous variants were found and the genotype-phenotype correlation was explored. This report highlights the need for thorough examination and investigation of the dental and skeletal systems. The results confirm the specificity of ANKRD11 mutations in KBG and further evidence for this transcription repressor in neural, cardiac, and skeletal development. The description of further cases of KBG syndrome is needed to further delineate this condition, in particular the specific neurological and behavioral phenotype.
      PubDate: 2017-04-27T13:24:46.307724-05:
      DOI: 10.1002/ajmg.a.38121
       
  • Trisomy 18 and holoprosencephaly
    • Authors: Rafael F. M. Rosa; Elisa P. E. Correia, Cristina S. Bastos, Gabriela S. da Silva, Jamile D. Correia, Ernani B. da Rosa, Daniélle B. Silveira, Luciano V. Targa, André C. da Cunha, Paulo R. G. Zen
      PubDate: 2017-04-27T13:24:43.957755-05:
      DOI: 10.1002/ajmg.a.38129
       
  • The impact of a sibling's life-limiting genetic condition on adult
           brothers and sisters
    • Authors: Erica Brown; Jane Coad, Anita Franklin
      Abstract: It is estimated that rare diseases affect the lives of over three million people in the United Kingdom. Of these, a significant proportion are children and young people with genetic life-limiting or life-shortening conditions. This study used a qualitative approach with in-depth semi-structured interviews to explore the experiences of 10 adult siblings of a baby diagnosed with Trisomy 13 (Patau syndrome) or Trisomy 18 (Edward syndrome). Findings illustrate that parental grief from the time of their child's diagnosis onward is also experienced by siblings. Although young adults may have conflicting feelings as a bereaved sibling, there is evidence that the experience impacts on their world views and their attitudes about prospective and expectant parenthood. The study highlights the importance of providing siblings with short-term and long-term support from the time of their brother's or their sister's diagnosis onward and provides new understanding about benefit of professional and peer support in helping young adults develop resilience and coping strategies.
      PubDate: 2017-04-27T13:24:41.537083-05:
      DOI: 10.1002/ajmg.a.38213
       
  • A case of familial transmission of the newly described DNMT3A-Overgrowth
           Syndrome
    • Authors: Gabrielle Lemire; Julie Gauthier, Jean-François Soucy, Marie-Ange Delrue
      Abstract: DNMT3A-Overgrowth Syndrome (also known as Tatton–Brown–Rahman Syndrome) (MIM 615879) has recently been described in 13 individuals with de novo heterozygous mutations in DNMT3A gene. This autosomal dominant condition is characterized by overgrowth, dysmorphic facial features and moderate intellectual disability. Missense and truncating point mutations, a small in-frame deletion, as well as microdeletion 2p23 have been reported. Moreover, DNMT3A is commonly somatically mutated in acute myeloid leukemia. We herein report a family with two siblings and their father affected by the syndrome. The proband is a 12 year-old boy with tall stature, macrocephaly, facial dysmorphism, and intellectual disability. His 10-year-old sister also has learning difficulties, overgrowth and mild facial dysmorphism. Their father is a 49 year-old man with tall stature, macrocephaly, learning difficulties, and minor facial dysmorphism. He had a right occipital osteoma removed at 20 years of age. A heterozygous splice site mutation NM_022552.4 (DNMT3A): c.2323-2A > T was found in the proband by whole exome sequencing analysis and by targeted Sanger Sequencing for the proband's sister and father. This mutation has not been previously reported and is believed to be pathogenic. Indeed, this substitution involves a highly conserved canonical splice site and is predicted to cause exon skipping. This is the first report of a familial transmission of DNMT3A-Overgrowth Syndrome, supporting the autosomal dominant inheritance. The proband's phenotype is more severe than that of his two other affected family members, which illustrates variable expressivity in the syndrome.
      PubDate: 2017-04-27T13:24:39.854399-05:
      DOI: 10.1002/ajmg.a.38119
       
  • Normal IQ is possible in Smith-Lemli-Opitz syndrome
    • Authors: Yasemen Eroglu; Mina Nguyen-Driver, Robert D. Steiner, Louise Merkens, Mark Merkens, Jean-Baptiste Roullet, Ellen Elias, Geeta Sarphare, Forbes D. Porter, Chumei Li, Elaine Tierney, Małgorzata J. Nowaczyk, Kurt A. Freeman
      Abstract: Children with Smith-Lemli-Opitz syndrome (SLOS) are typically reported to have moderate to severe intellectual disability. This study aims to determine whether normal cognitive function is possible in this population and to describe clinical, biochemical and molecular characteristics of children with SLOS and normal intelligent quotient (IQ). The study included children with SLOS who underwent cognitive testing in four centers. All children with at least one IQ composite score above 80 were included in the study. Six girls, three boys with SLOS were found to have normal or low-normal IQ in a cohort of 145 children with SLOS. Major/multiple organ anomalies and low serum cholesterol levels were uncommon. No correlation with IQ and genotype was evident and no specific developmental profile were observed. Thus, normal or low-normal cognitive function is possible in SLOS. Further studies are needed to elucidate factors contributing to normal or low-normal cognitive function in children with SLOS.
      PubDate: 2017-03-27T23:45:22.867465-05:
      DOI: 10.1002/ajmg.a.38125
       
  • Table of Contents, Volume 173A, Number 7, July 2017
    • First page: 1725
      PubDate: 2017-06-15T05:47:38.879751-05:
      DOI: 10.1002/ajmg.a.37911
       
  • Publication schedule for 2017
    • First page: 1730
      PubDate: 2017-06-15T05:47:38.531692-05:
      DOI: 10.1002/ajmg.a.37912
       
  • Proposed federal legislation could compromise genetic privacy
    • First page: 1731
      PubDate: 2017-06-15T05:47:34.951017-05:
      DOI: 10.1002/ajmg.a.37913
       
  • Agreement reached on initially discordant genetic variant interpretations
    • First page: 1732
      PubDate: 2017-06-15T05:47:31.40418-05:0
      DOI: 10.1002/ajmg.a.38335
       
  • In this issue
    • First page: 1734
      PubDate: 2017-06-15T05:47:29.465791-05:
      DOI: 10.1002/ajmg.a.37910
       
  • Nomenclature and definition in asymmetric regional body overgrowth
    • Authors: Jennifer M. Kalish; Leslie G. Biesecker, Frederic Brioude, Matthew A. Deardorff, Alessandra Di Cesare-Merlone, Todd Druley, Giovanni B. Ferrero, Pablo Lapunzina, Lidia Larizza, Saskia Maas, Marina Macchiaiolo, Eamonn R. Maher, Silvia Maitz, Julian A. Martinez-Agosto, Alessandro Mussa, Peter Robinson, Silvia Russo, Angelo Selicorni, Raoul C. Hennekam
      First page: 1735
      Abstract: We designate a novel term “isolated lateralized overgrowth” (ILO) for the findings previously described as “isolated hemihypertrophy” and “isolated hemihyperplasia.” ILO is defined as lateralized overgrowth in the absence of a recognized pattern of malformations, dysplasia, or morphologic variants. ILO is likely genetically heterogeneous. Further study is required to determine more of the underlying genetic etiologies and potential associations with currently unrecognized patterns of malformation.
      PubDate: 2017-05-05T08:50:26.094469-05:
      DOI: 10.1002/ajmg.a.38266
       
  • Autosomal dominant frontometaphyseal dysplasia: Delineation of the
           clinical phenotype
    • Authors: Emma M. Wade; Zandra A. Jenkins, Philip B. Daniel, Tim Morgan, Marie C. Addor, Lesley C. Adés, Debora Bertola, Axel Bohring, Erin Carter, Tae-Joon Cho, Christa M. de Geus, Hans-Christoph Duba, Elaine Fletcher, Kinga Hadzsiev, Raoul C. M. Hennekam, Chong A. Kim, Deborah Krakow, Eva Morava, Teresa Neuhann, David Sillence, Andrea Superti-Furga, Hermine E. Veenstra-Knol, Dagmar Wieczorek, Louise C. Wilson, David M. Markie, Stephen P. Robertson
      First page: 1739
      Abstract: Frontometaphyseal dysplasia (FMD) is caused by gain-of-function mutations in the X-linked gene FLNA in approximately 50% of patients. Recently we characterized an autosomal dominant form of FMD (AD-FMD) caused by mutations in MAP3K7, which accounts for the condition in the majority of patients who lack a FLNA mutation. We previously also described a patient with a de novo variant in TAB2, which we hypothesized was causative of another form of AD-FMD. In this study, a cohort of 20 individuals with AD-FMD is clinically evaluated. This cohort consists of 15 individuals with the recently described, recurrent mutation (c.1454C>T) in MAP3K7, as well as three individuals with missense mutations that result in substitutions in the N-terminal kinase domain of TGFβ-activated kinase 1 (TAK1), encoded by MAP3K7. Additionally, two individuals have missense variants in the gene TAB2, which encodes a protein with a close functional relationship to TAK1, TAK1-associated binding protein 2 (TAB2). Although the X-linked and autosomal dominant forms of FMD are very similar, there are distinctions to be made between the two conditions. Individuals with AD-FMD have characteristic facial features, and are more likely to be deaf, have scoliosis and cervical fusions, and have a cleft palate. Furthermore, there are features only found in AD-FMD in our review of the literature including valgus deformity of the feet and predisposition to keloid scarring. Finally, intellectual disability is present in a small number of subjects with AD-FMD but has not been described in association with X-linked FMD.
      PubDate: 2017-05-12T09:07:36.342566-05:
      DOI: 10.1002/ajmg.a.38267
       
  • Mandibulofacial dysostosis Bauru type: Refining the phenotype
    • Authors: Priscila P. Moura; Nancy M. Kokitsu-Nakata, Marília S. Yatabe, Siulan Vendramini-Pittoli, Pedro H. Hori, Maria L. Guion-Almeida, Daniela G. Garib, Antonio Richieri-Costa, Roseli M. Zechi-Ceide
      First page: 1747
      Abstract: Mandibulofacial dysostosis (MFD) Bauru type (OMIM 604830) is a rare genetic condition characterized mainly by malar hypoplasia, orofacial cleft, and micrognathia. Here, we describe the clinical and radiographic sings of 13 individuals (12 female and 1 male) from eight unrelated kindreds with MFD Bauru type, including four previously reported cases, treated at the Hospital for Rehabilitation of Craniofacial Anomalies. The clinical phenotype was characterized by severe underdevelopment of mandible, midface hypoplasia, orofacial cleft, bitemporal narrowing, mild upper eyelid down slanting, high nasal bridge, thick and everted lower lip, minor ears abnormalities, and hearing loss. Radiographic aspects included downslanting of zygomatic arch, maxillary hypoplasia, microretrognathia, hypoplastic mandibular condyles, and ectopic external auditory canal. Recurrence was observed in two of eight families and the affected distribution pattern was compatible with autosomal dominant inheritance in one and autosomal recessive in another, indicating possible genetic heterogeneity for this condition. Clinical and radiographic findings in this report contribute to the delineation of this rare MFD.
      PubDate: 2017-05-30T11:10:37.567951-05:
      DOI: 10.1002/ajmg.a.38257
       
  • Wiedemann–Rautenstrauch syndrome: A phenotype analysis
    • Authors: Stefano Paolacci; Debora Bertola, José Franco, Shehla Mohammed, Marco Tartaglia, Bernd Wollnik, Raoul C. Hennekam
      First page: 1763
      Abstract: Wiedemann–Rautenstrauch syndrome (WRS) is a neonatal progeroid disorder characterized by growth retardation, lipodystrophy, a distinctive face, and dental anomalies. Patients reported to date demonstrate a remarkable variability in phenotype, which hampers diagnostics. We performed a literature search, and analyzed 51 reported patients, using the originally reported patients as “gold standard.” In 15 patients sufficient information and photographic evidence was available to confirm the clinical diagnosis. In 12 patients the diagnosis was suggestive but lack of data prevented a definite diagnosis, and in 24 patients an alternative diagnosis was likely. Core manifestations of the syndrome are marked pre-natal and severe post-natal growth retardation, an unusual face (triangular shape, sparse hair, small mouth, pointed chin), dental anomalies (natal teeth; hypodontia), generalized lipodystrophy with localized fat masses, and—in some cases—progressive ataxia and tremor. It has been suggested that the syndrome might be caused by biallelic variants in POLR3A, identified by exome sequencing in a single patient only. Therefore, we compared the WRS phenotype with characteristics of conditions known to be caused by autosomal recessively inherited POLR3A mutations. There are major differences but there are also similarities in phenotype, which sustain the suggestion that the syndrome can be caused by disturbed POLR3A functioning.
      PubDate: 2017-04-26T23:40:52.806733-05:
      DOI: 10.1002/ajmg.a.38246
       
  • Whole exome sequencing of families with 1q21.1 microdeletion or
           microduplication
    • Authors: Ying Qiao; Chansonette Badduke, Flamingo Tang, David Cowieson, Sally Martell, Suzanne M. E. Lewis, Maria S. Peñaherrera, Wendy P. Robinson, Allen Volchuk, Evica Rajcan-Separovic
      First page: 1782
      Abstract: Recurrent microduplications/microdeletions of 1q21.1 are characterized by variable phenotypes ranging from normal development to developmental delay (DD) and congenital anomalies. Their interpretation is challenging especially in families with affected and unaffected carriers. We used whole exome sequencing (WES) to look for sequence variants in two male probands with inherited 1q21.1 CNVs that could explain their more severe phenotypes. One proband had a 1q21.1 deletion transmitted from maternal grandmother, while the other had a paternal duplication. We found mutations in five genes (SMPD1, WNK3, NOS1, ATF6, and EFHC1) that could contribute to the more severe phenotype in the probands in comparison to their mildly affected or unaffected 1q21.1 CNV carrying relatives. Interestingly, all genes have roles in stress responses (oxidative/Endoplasmic Reticulum (ER)/osmotic). One of the variants was in an X-linked gene WNK3 and segregated with the developmental features and X inactivation pattern in the family with 1q21.1 deletion transmitted from maternal grandmother. In silico analysis of all rare deleterious variants in both probands identified enrichment in nervous system diseases, metabolic pathways, protein processing in the ER and protein export. Our studies suggest that rare deleterious variants outside of the 1q21.1 CNV, individually or as a pool, could contribute to phenotypic variability in carriers of this CNV. Rare deleterious variants in stress response genes are of interest and raise the possibility of susceptibility of carriers to variable environmental influences. Next generation sequencing of additional familial cases with 1q21.1 CNV could further help determine the possible causes of phenotypic variability in carriers of this CNV.
      PubDate: 2017-05-05T08:50:31.956434-05:
      DOI: 10.1002/ajmg.a.38247
       
  • A comparison of the functional health of children with Costello syndrome
           in 1999 and in 2015
    • Authors: Viviana Bompadre; Tressa Mattioli-Lewis, Walid K. Yassir, Michael J. Goldberg
      First page: 1792
      Abstract: Costello Syndrome is a rare congenital condition characterized by failure-to-thrive, cardiac abnormalities, distinctive facial features, predisposition to malignant tumors, and developmental delay. In 1999, we analyzed the functional health in a cohort of 18 patients. Since then, a mutation in the HRAS gene has been found to be causative, medical management has been refined, and the level of awareness has increased. The purpose of this study is to compare the functional health outcomes from the 1999 cohort with data prospectively collected from a comparable cohort in 2015. The Pediatric Outcome Data Collection Instrument (PODCI) was administered to parents of children with Costello syndrome during the 2015 International Costello Syndrome Conference. The same instrument and setting were used in the 1999 study. We compared functional health scores from the two groups. A total of 21 participants were included in the 2015 cohort; 15 females (71%) and 6 males (29%). Average age was 5.8 years (range 2–16). When comparing functional health outcomes, we found that the 2015 cohort scored slightly higher in Upper Extremity and Physical Function (57 vs. 54) and Comfort scales (86 vs. 82). However, there was no significant difference in any of the PODCI scales between the two groups. When compared with normative scores, both groups scored significantly lower in every scale except for happiness (p = 0.2952). Despite recent advancements, functional health outcomes in 2015 were similar to those measured in a different cohort in 1999.
      PubDate: 2017-05-09T23:20:52.278337-05:
      DOI: 10.1002/ajmg.a.38262
       
  • Neuropsychological phenotypes of 76 individuals with Joubert syndrome
           evaluated at a single center
    • Authors: Angela C. Summers; Joseph Snow, Edythe Wiggs, Alexander G. Liu, Camilo Toro, Andrea Poretti, Wadih M. Zein, Brian P. Brooks, Melissa A. Parisi, Sara Inati, Dan Doherty, Meghana Vemulapalli, Jim C. Mullikin, , Thierry Vilboux, William A. Gahl, Meral Gunay-Aygun
      First page: 1796
      Abstract: Joubert syndrome (JS) is a genetically heterogeneous ciliopathy characterized by hypo-dysplasia of the cerebellar vermis, a distinct hindbrain/midbrain malformation (molar tooth sign), and intellectual disability. We evaluated the neuropsychological profiles of 76 participants with JS in the context of molecular genetics and clinical covariates. Evaluations included neuropsychological testing, structured parental interviews, DNA sequencing, brain magnetic resonance imaging (MRI), electroencephalography (EEG), ophthalmologic examination, and assessment for renal and hepatic disease. On average, participants manifested Full Scale Intelligence Quotients (FSIQ) in the moderately to profoundly low range (M = 64.3 ± 15.3). Of the Wechsler index scores, verbal comprehension was least affected and processing speed was most affected. Receptive language was rated as better than expressive language on the Vineland Adaptive Behavior Scales-Second Edition. Those with abnormal EEG had a significantly lower FSIQ (n = 15; M = 50.7 ± 12.9) compared to participants with normal EEG (n = 39; M = 64.7 ± 16.3; p = .004). Participants taking psychiatric medications manifested a lower FSIQ (n = 20; M = 54.8 ± 13.2) than those not taking them (n = 42; M = 65.0 ± 17.2; p = .022). These correlations were also present in the TMEM67-related JS sub-cohort (n = 14). Based on parental assessment, psychiatric and behavioral problems were significantly more common than in the general population for all measures (p 
      PubDate: 2017-05-12T00:29:19.540628-05:
      DOI: 10.1002/ajmg.a.38272
       
  • Identification of a de novo variant in CHUK in a patient with an EEC/AEC
           syndrome-like phenotype and hypogammaglobulinemia
    • Authors: Kriti D. Khandelwal; Charlotte W. Ockeloen, Hanka Venselaar, Cécile Boulanger, Bénédicte Brichard, Etienne Sokal, Rolph Pfundt, Tuula Rinne, Ellen van Beusekom, Marjon Bloemen, Gerrit Vriend, Nicole Revencu, Carine E. L. Carels, Hans van Bokhoven, Huiqing Zhou
      First page: 1813
      Abstract: The cardinal features of Ectrodactyly, Ectodermal dysplasia, Cleft lip/palate (EEC), and Ankyloblepharon-Ectodermal defects-Cleft lip/palate (AEC) syndromes are ectodermal dysplasia (ED), orofacial clefting, and limb anomalies. EEC and AEC are caused by heterozygous mutations in the transcription factor p63 encoded by TP63. Here, we report a patient with an EEC/AEC syndrome-like phenotype, including ankyloblepharon, ED, cleft palate, ectrodactyly, syndactyly, additional hypogammaglobulinemia, and growth delay. Neither pathogenic mutations in TP63 nor CNVs at the TP63 locus were identified. Exome sequencing revealed de novo heterozygous variants in CHUK (conserved helix-loop-helix ubiquitous kinase), PTGER4, and IFIT2. While the variant in PTGER4 might contribute to the immunodeficiency and growth delay, the variant in CHUK appeared to be most relevant for the EEC/AEC-like phenotype. CHUK is a direct target gene of p63 and encodes a component of the IKK complex that plays a key role in NF-κB pathway activation. The identified CHUK variant (g.101980394T>C; c.425A>G; p.His142Arg) is located in the kinase domain which is responsible for the phosphorylation activity of the protein. The variant may affect CHUK function and thus contribute to the disease phenotype in three ways: (1) the variant exhibits a dominant negative effect and results in an inactive IKK complex that affects the canonical NF-κB pathway; (2) it affects the feedback loop of the canonical and non-canonical NF-κB pathways that are CHUK kinase activity-dependent; and (3) it disrupts NF-κB independent epidermal development that is often p63-dependent. Therefore, we propose that the heterozygous CHUK variant is highly likely to be causative to the EEC/AEC-like and additional hypogammaglobulinemia phenotypes in the patient presented here.
      PubDate: 2017-05-17T10:55:35.704125-05:
      DOI: 10.1002/ajmg.a.38274
       
  • Adaptive and maladaptive functioning in Kleefstra syndrome compared to
           other rare genetic disorders with intellectual disabilities
    • Authors: Karlijn Vermeulen; Anneke de Boer, Joost G. E. Janzing, David A. Koolen, Charlotte W. Ockeloen, Marjolein H. Willemsen, Floor M. Verhoef, Patricia A. M. van Deurzen, Linde van Dongen, Hans van Bokhoven, Jos I. M. Egger, Wouter G. Staal, Tjitske Kleefstra
      First page: 1821
      Abstract: Detailed neurobehavioural profiles are of major value for specific clinical management, but have remained underexposed in the population with intellectual disabilities (ID). This was traditionally classified based on IQ level only. Rapid advances in genetics enable etiology based stratification in the majority of patients, which reduces clinical heterogeneity. This paper illustrates that specific profiles can be obtained for rare syndromes with ID. Our main aim was to study (mal)adaptive functioning in Kleefstra Syndrome (KS) by comparing and contrasting our findings to three other subgroups: Koolen-de Vries Syndrome, GATAD2B-related syndrome, and a mixed control group of individuals with ID. In total, we studied 58 individuals (28 males, 30 females) with ID; 24 were diagnosed with KS, 13 with Koolen-de Vries Syndrome, 6 with the GATAD2B-related syndrome, and 15 individuals with undefined neurodevelopmental disorders. All individuals were examined with a Vineland Adaptive Behavior Scale, mini PAS-ADD interview, and an Autism Diagnostic Observation Schedule to obtain measures of adaptive and maladaptive functioning. Each of the three distinctive genetic disorders showed its own specific profile of adaptive and maladaptive functioning, while being contrasted mutually. However, when data of the subgroups altogether are contrasted to the data of KS, such differences could not be demonstrated. Based on our findings, specific management recommendations were discussed for each of the three syndromes. It is strongly suggested to consider the genetic origin in individuals with congenital neurodevelopmental disorders for individual based psychiatric and behavioral management.
      PubDate: 2017-05-12T09:07:02.966978-05:
      DOI: 10.1002/ajmg.a.38280
       
  • Defining mandibular morphology in Robin sequence: A matched case-control
           study
    • Authors: Srinivas M. Susarla; Nefeli Vasilakou, Hitesh Kapadia, Mark Egbert, Richard A. Hopper, Kelly N. Evans
      First page: 1831
      Abstract: Robin Sequence (RS) is classically defined as the triad of micrognathia, glossoptosis, and airway obstruction. While there remains significant debate over diagnostic criteria for severity, there is consensus regarding micrognathia as a defining feature of the condition. The purpose of this study was to compare mandibular morphology among infants and children with RS to infants and children without RS using maxillofacial computed tomography. Our hypothesis was that there are discrete morphologic differences between RS and non-RS mandibles. Our goal was to determine if there are defined and measureable differences in RS mandible shape that can be used in defining the sequence. We identified 20 cases with RS and 20 age- and sex-matched controls without RS. Linear, angular, and composite measurements were obtained for each patient. Cases had shorter mandibular sagittal lengths (−27%, p = 0.001), shorter inferior border arc lengths (−11.5%, p = 0.002), steeper gonial angles (+10.5%, p 
      PubDate: 2017-04-13T12:10:28.530836-05:
      DOI: 10.1002/ajmg.a.38248
       
  • Benchmarking outcomes in the Neonatal Intensive Care Unit: Cytogenetic and
           molecular diagnostic rates in a retrospective cohort
    • Authors: Faheem Malam; Taila Hartley, Meredith K. Gillespie, Christine M. Armour, Erika Bariciak, Gail E. Graham, Sarah M. Nikkel, Julie Richer, Sarah L. Sawyer, Kym M. Boycott, David A. Dyment
      First page: 1839
      Abstract: Genetic disease and congenital anomalies continue to be a leading cause of neonate mortality and morbidity. A genetic diagnosis in the neonatal intensive care unit (NICU) can be a challenge given the associated genetic heterogeneity and early stage of a disease. We set out to evaluate the outcomes of Medical Genetics consultation in the NICU in terms of cytogenetic and molecular diagnostic rates and impact on management. We retrospectively reviewed 132 charts from patients admitted to the NICU who received a Medical Genetics diagnostic evaluation over a 2 year period. Of the 132 patients reviewed, 26% (34/132) received a cytogenetic or molecular diagnosis based on the Medical Genetics diagnostic evaluation; only 10% (13/132) received a diagnosis during their admission. The additional 16% (21 patients) received their diagnosis following NICU discharge, but based on a genetic test initiated during hospital-stay. Mean time from NICU admission to confirmed diagnosis was 24 days. For those who received a genetic diagnosis, the information was considered beneficial for clinical management in all, and a direct change to medical management occurred for 12% (4/32). For those non-diagnosed infants seen in out-patient follow-up clinic, diagnoses were made in 8% (3/37). The diagnoses made post-discharge from the NICU comprised a greater number of Mendelian disorders and represent an opportunity to improve genetic care. The adoption of diagnostic tools, such as exome sequencing, used in parallel with traditional approaches will improve rate of diagnoses and will have a significant impact, in particular when the differential diagnosis is broad.
      PubDate: 2017-05-09T23:20:57.388462-05:
      DOI: 10.1002/ajmg.a.38250
       
  • 6q25.1 (TAB2) microdeletion syndrome: Congenital heart defects and
           cardiomyopathy
    • Authors: Andrew Cheng; Mary Beth P. Dinulos, Whitney Neufeld-Kaiser, Jill Rosenfeld, McKenna Kyriss, Suneeta Madan-Khetarpal, Hiba Risheg, Peter H. Byers, Yajuan J. Liu
      First page: 1848
      Abstract: Congenital heart defects (CHD) are the most frequent type of congenital anomaly and are often associated with genetic and chromosomal syndromes. Haploinsufficiency of TAB2 (TGF-beta activated kinase 1/MAP3K7 binding protein 2) has been proposed to cause valvular and cardiac outflow tract structural abnormalities. In this study, we describe 13 newly identified individuals with microdeletions of chromosome 6q25.1 that involve TAB2. One of the patients in our study cohort has the smallest deletion yet reported, affecting only TAB2. These were compared to 27 other patients reported in the published literature or DECIPHER to have similar microdeletions, for a total study group of 40 patients. Our study shows that individuals with TAB2 deletions are predisposed to developing a primary cardiomyopathy with reduced systolic function, even in the absence of CHD. Our study cohort also shares a number of non-cardiac phenotypic findings: characteristic dysmorphic facial features, intrauterine growth restriction and/or postnatal proportionate short stature, hypotonia, developmental delay and/or intellectual disability, and connective tissue abnormalities. We conclude that a microdeletion of 6q25.1 that includes TAB2 causes a distinctive, multi-systemic syndrome. The 6q25.1 microdeletion syndrome should be considered in a patient with cardiomyopathy or a CHD, especially valve and/or atrial or ventricular septal abnormalities, and with phenotypic features described in this study. We recommend that patients with a TAB2 deletion be screened longitudinally for systolic heart failure, even if an initial echocardiogram is normal.
      PubDate: 2017-05-02T10:27:21.60208-05:0
      DOI: 10.1002/ajmg.a.38254
       
  • Kaposi sarcoma, oral malformations, mitral dysplasia, and scoliosis
           associated with 7q34-q36.3 heterozygous terminal deletion
    • Authors: Carolyn C. Jackson; Alain Lefèvre-Utile, Anne Guimier, Valérie Malan, Julie Bruneau, Antoine Gessain, Olivier Cassar, Jeanne Amiel, Aurélie Cobat, Vimel Rattina, Laurent Abel, Jean-Laurent Casanova, Stéphane Blanche
      First page: 1858
      Abstract: Chromosome 7 germline macrodeletions have been implicated in human congenital malformations and developmental delays. We herein report a novel heterozygous macrodeletion of 7q34-q36.3 in a 16-year-old girl originally from West Indies. Similar to previously reported cases of germline chromosome 7q terminal deletions, our patient has dental malposition, and developmental (growth and intellectual) delay. Novel phenotypic features include endemic Kaposi sarcoma (KS), furrowed tongue, thoracolumbar scoliosis, and mild mitral valve dysplasia. The occurrence of human herpes virus 8-driven KS, in a child otherwise normally resistant to other infectious agents and without any other tumoral lesion, points to a very selective immunodeficiency. While defects in organogenesis have been described with such macrodeletions, this is the first report of immunodeficiency and cancer predisposition.
      PubDate: 2017-05-09T23:20:51.208588-05:
      DOI: 10.1002/ajmg.a.38275
       
  • Diagnosis of CoPAN by whole exome sequencing: Waking up a sleeping tiger's
           eye
    • Authors: Christina Evers; Angelika Seitz, Birgit Assmann, Thomas Opladen, Stephanie Karch, Katrin Hinderhofer, Martin Granzow, Nagarajan Paramasivam, Roland Eils, Nicolle Diessl, Claus R. Bartram, Ute Moog
      First page: 1878
      Abstract: Neurodegeneration with brain iron accumulation (NBIA) is a group of neurodegenerative disorders characterized by iron accumulation in the basal ganglia. Recently, mutations in CoA synthase (COASY) have been identified as a cause of a novel NBIA subtype (COASY Protein-Associated Neurodegeneration, CoPAN) in two patients with dystonic paraparesis, parkinsonian features, cognitive impairment, behavior abnormalities, and axonal neuropathy. COASY encodes an enzyme required for Coenzyme A (CoA) biosynthesis. Using whole exome sequencing (WES) we identified compound heterozygous COASY mutations in two siblings with intellectual disability, ataxic gait, progressive spasticity, and obsessive-compulsive behavior. The “eye-of-the tiger-sign,” a characteristic hypointense spot within the hyperintense globi pallidi on MRI found in the most common subtype of NBIA (Pantothenate Kinase-Associated Neurodegeneration, PKAN), was not present. Instead, bilateral hyperintensity and swelling of caudate nucleus, putamen, and thalamus were found. In addition, our patients showed a small corpus callosum and frontotemporal and parietal white matter changes, expanding the brain phenotype of patients with CoPAN. Metabolic investigations showed increased free carnitine and decreased acylcarnitines in the patientś dried blood samples. Carnitine palmitoyl transferase 1 (CPT1) deficiency was excluded by further enzymatic and metabolic investigations. As CoA and its derivate Acetyl-CoA play an essential role in fatty acid metabolism, we assume that abnormal acylcarnitine profiles are a result of the COASY mutations. This report not only illustrates that WES is a powerful tool to elucidate the etiology of rare genetic diseases, but also identifies unique neuroimaging and metabolic findings that may be key features for an early diagnosis of CoPAN.
      PubDate: 2017-05-10T07:30:25.298572-05:
      DOI: 10.1002/ajmg.a.38252
       
  • Sclerotic bone lesions in tuberous sclerosis complex: A
           genotype–phenotype study
    • Authors: Susana Boronat; Ignasi Barber, Elizabeth Anne Thiele
      First page: 1891
      Abstract: Tuberous sclerosis complex (TSC) is due to pathogenic variants in TSC1 or TSC2 genes resulting in hyperactivation of the mTOR pathway. Many organ systems can be affected, such as brain, skin, eye, heart, bone, kidney, or lung. Sclerotic bone lesions have been reported as frequent findings in TSC although they are not considered diagnostic criteria. The objective of this study is to characterize sclerotic bone lesions detected by chest CT in a large cohort of adult TSC patients and to correlate with genotype. Chest CT scans of 92 adult patients with a definite clinical diagnosis of TSC were reviewed. Sclerotic bone lesions were found in 82 cases (89%) and affected mainly the posterior vertebral elements. Patients without bone lesions had negative mutational studies of TSC1/TSC2 in 86%. Awareness of these lesions in TSC is important to avoid misdiagnosis with osteoblastic metastases.
      PubDate: 2017-05-09T23:20:53.647822-05:
      DOI: 10.1002/ajmg.a.38260
       
  • Acne conglobata in a long-term survivor with trisomy 13, accompanied by
           selective IgM deficiency
    • Authors: Chiyoko N. Inoue; Yoshiko Tanaka, Nobuko Tabata
      First page: 1903
      Abstract: Trisomy 13 (T13) is a congenital chromosomal disorder that is usually fatal within 2 years of birth, and only a few patients have been reported to reach adolescence. Here, we report a male long-term survivor of T13, currently 15 years of age, with a several-year history of extensive acne conglobata (AC) with abscesses on the face and neck. Methicillin-resistant Staphylococcus aureus was consistently isolated from the pustular lesions. Serum IgM levels were extremely low at 10 mg/dl. There were no abnormalities in neutrophil and total B cell number, or in serum IgA and IgG levels. Increased CD8+ T cell counts and inversion of the CD4/CD8 ratio were observed repeatedly. The patient's clinical features and laboratory data support a diagnosis of selective IgM deficiency (SIgMD) with concurrent AC. Immunoglobulin replacement therapy elevated serum IgM levels to the normal range and reduced the severity of AC. We suggest that T13 may represent a syndromic disorder associated with multiple organ malformation and a risk of developing immunodeficiency involving SIgMD. Because pediatric SIgMD is rare and an immunological abnormality in T13 patients has not previously been reported, we describe the patient's clinical course.
      PubDate: 2017-05-07T20:05:51.685495-05:
      DOI: 10.1002/ajmg.a.38251
       
  • Compound heterozygous mutations in COL1A1 associated with an atypical form
           of type I osteogenesis imperfecta
    • Authors: Amanda M. Ackermann; Michael A. Levine
      First page: 1907
      Abstract: Heterozygous mutations in the genes encoding the proα1(I) or proα2(I) chains of type I procollagen (COL1A1 and COL1A2, respectively) account for most cases of osteogenesis imperfecta (OI), a disorder characterized by reduced bone strength and increased fracture risk. COL1A1 mutations can also cause rare cases of Ehlers–Danlos syndrome (EDS), a disorder that primarily affects connective tissue and often includes reduced bone mass. Here we present a kindred of three young siblings ages 1–4 years old whose mother has a history of mild type I OI. All three children are compound heterozygotes for COL1A1 mutations, with a novel frameshift mutation (c.2522delC; p.Pro841Leufs*266) from their mother and a known missense mutation (c.3196C>T; p.R1066C) from their clinically unaffected father, which has previously been described as causing a combined type I OI/EDS phenotype. The three children exhibit features of both COL1A1 mutations: early and frequent long bone fractures, joint hyperextensibility, and blue sclerae. We describe three siblings who are the first reported surviving subjects with biallelic pathogenic COL1A1 mutations. They have a more severe form of type I OI with features of EDS that represents their compound heterozygosity for two deleterious COL1A1 mutations. Their long-term outcomes are yet to be determined.
      PubDate: 2017-04-24T02:25:35.863885-05:
      DOI: 10.1002/ajmg.a.38238
       
  • DiGeorge-like syndrome in a child with a 3p12.3 deletion involving MIR4273
           gene born to a mother with gestational diabetes mellitus
    • Authors: Emilia Cirillo; Giuliana Giardino, Vera Gallo, Giovanni Galasso, Roberta Romano, Roberta D'Assante, Giulia Scalia, Luigi Del Vecchio, Lucio Nitsch, Rita Genesio, Claudio Pignata
      First page: 1913
      Abstract: Chromosome 22q11.2 deletion is the most common chromosomal alteration associated with DiGeorge syndrome (DGS), even though this is not the only underlying cause of DGS. In rare patients, mutations in a single gene, TBX1, have been described resulting in a DGS phenotype. Recently, it has been reported that at least part of the TBX1 mutant phenotype is due to excessive bone morphogenetic proteins (BMP) signaling. Evidence suggests that miRNA may modulate the expression of critical T-box transcriptional regulators during midface development and Bmp-signaling. We report on a 7-year-old Caucasian male born to a mother affected with gestational diabetes (GDM) who had a 371Kb-interstitial deletion of 3p12.3 identified by array CGH, involving the ZNF717, MIR1243, and 4273 genes. The child presented with a DiGeorge anomaly (DGA) associated with unilateral renal agenesis and language delay. The immunological evaluation revealed a severe reduction and impairment of T lymphocytes. FISH analysis and TBX1 sequencing were negative. Among the miRNA-4273 predicted target genes, we found BMP3, which is involved in several steps of embryogenesis including kidney and lung organogenesis and in insulin gene expression. Since, DGA is not commonly found in newborns of diabetic mothers, we hypothesize that the pathogenesis of DGA associated with GDM is multifactorial, involving both genetic and/or epigenetic cofactors.
      PubDate: 2017-04-24T06:00:49.009019-05:
      DOI: 10.1002/ajmg.a.38242
       
  • Vascular twin nevi
    • Authors: Senay Agirgol; Hatice Nur Ozturk, Tugba Ozkok Akbulut, Ceyda Gunduzoglu, Leyli Kadriye Koc, Zafer Turkoglu
      First page: 1919
      Abstract: Vascular twin nevi (VTN) are characterized by the simultaneous dermatological manifestatiton of a telangiectatic naevus close to a nevus anemicus. Nevus anemicus (NA) is a vascular anomaly characterized by localized pale patches with normal melanine and melanocyte level. According to twin spotting phenomenon crossing-over in heterozygous somatic-cells during mitosis results in two different offspring homozygous cells. Consequent to this mechanism, two different vascular anomalies may occur at the same region. We present a patient with VTN and NA combination which we think serves as an example for a rare twin spotting phenomenon in the literature.
      PubDate: 2017-04-27T13:24:38.204727-05:
      DOI: 10.1002/ajmg.a.38117
       
  • Clinical and molecular characterization of a second family with the 12q14
           microdeletion syndrome and review of the literature
    • Authors: Rita Fischetto; Orazio Palumbo, Federica Ortolani, Pietro Palumbo, Maria Pia Leone, Francesco Andrea Causio, Sabino Pesce, Maria Christina Digilio, Massimo Carella, Francesco Papadia
      First page: 1922
      Abstract: The 12q14 microdeletion syndrome is a rare condition characterized by low birth weight, failure to thrive, short stature, learning disabilities, and osteopoikilosis. To date, 20 cases of 12q14 deletion have been reported in the literature, displaying both phenotypic than genetic variability. We report on three familial cases, a mother and two brothers, with severe short stature. The mother and elder brother presented with osteopoikilosis while the younger brother had severe short stature and developmental delay. SNP array analysis revealed a 1.9 Mb heterozygous 12q14.2q14.3 deletion in all three patients encompassing 14 genes and 3 miRNAs. In addition, the younger brother carried a paternal 11q13.4 duplication including the SHANK2 gene. This latter patient was investigated for developmental delay and did not show osteopoikilosis, confirming the role of age in the clinical presentation of this condition. To the best of our knowledge, this is the second family described with the syndrome. Comparing the clinical and molecular data of our patients with those previously reported we performed a detailed genotype–phenotype correlation confirming the association between growth retardation and osteopoikilosis when the rearrangement includes both LEMD3 and HMGA2 genes. In addition, we suggest the XPOT, TBK1, WIF1 genes as candidates for the clinical features observed in our patients and discuss for the first time the possible involvement of some microRNAs, when deleted, in the etiology of the phenotypes in 12q14 microdeletion syndrome patients. We expect the interpretation of our findings to be useful both from a molecular point of view and for genetic counseling.
      PubDate: 2017-04-13T12:10:47.060843-05:
      DOI: 10.1002/ajmg.a.38253
       
  • Male child with somatic mosaic Osteopathia Striata with Cranial Sclerosis
           caused by a novel pathogenic AMER1 frameshift mutation
    • Authors: Jennifer Hague; Isabelle Delon, Kim Brugger, Howard Martin, Leanne Sparnon, Ingrid Simonic, Stephen Abbs, Soo-Mi Park
      First page: 1931
      Abstract: Osteopathia striata with cranial sclerosis (OSCS; OMIM #300373) is a rare X-linked dominant condition caused by mutations in the AMER1 gene (also known as WTX or FAM123B). It is a condition which usually affects females in whom the clinical phenotype can be extremely variable. Conversely affected males typically die in utero or during the neonatal period [Perdu et al. (); Clinical Genetics 80: 383-388; Vasiljevic et al. (); Prenatal Diagnosis 35: 302-304]. There have been a small number of reported cases of surviving males, including three patients who are somatic mosaic for the condition [Chénier, Noor, Dupuis, Stavropoulos, & Mendoza-Londono, (); American Journal of Medical Genetics Part A 158A: 2946-2952; Holman et al. (); American Journal of Medical Genetics Part A 155A: 2397-2408; Joseph, Shoji, & Econs, (); The Journal of Clinical Endocrinology and Metabolism 95: 1506-1507]. We report a case of a male child who has proven somatic mosaicism for OSCS associated with a novel pathogenic frameshift mutation, c.607_611delAGGCC (p.Arg203 fs) in AMER1. We describe the multisystemic clinical features which include macrocephaly with ventriculomegaly and requirement for ventriculoperitoneal shunt, cleft palate, and respiratory difficulties after birth requiring tracheostomy insertion, persistent patent ductus arteriosus, failure to thrive and gastrostomy insertion, growth retardation, ophthalmoplegia, kidney malformation, cryptorchidism, and developmental delay. The use of new technologies with next generation sequencing (NGS) may improve the detection rate of mosaicism in rare conditions.
      PubDate: 2017-05-12T00:29:39.118282-05:
      DOI: 10.1002/ajmg.a.38261
       
  • Phosphoglycerate dehydrogenase (PHGDH) deficiency without epilepsy
           mimicking primary microcephaly
    • Authors: Antoine Poli; Yoann Vial, Damien Haye, Sandrine Passemard, Manuel Schiff, Hala Nasser, Catherine Delanoe, Emma Cuadro, Rémi Kom, Narcisse Elanga, Anne Favre, Séverine Drunat, Alain Verloes
      First page: 1936
      Abstract: Phosphoglycerate dehydrogenase (PHGDH) deficiency (OMIM 256520) is a rare autosomal recessive disorder of serine synthesis, with mostly severe congenital microcephaly, caused by mutations in the PHGDH gene. Fourteen patients reported to date show severe, early onset, drug resistant epilepsy. In a cohort of patients referred for primary microcephaly, compound heterozygosity for two unreported variants in PHGDG was identified by exome sequencing in a pair of sibs who died aged 4.5 months and 4.5 years. They had severe neurological involvement with congenital microcephaly, disorganized EEG, and progressive spasticity, but never had seizures. Exome usage in clinical practice is likely to lead to an expansion of the clinical spectrum of known disorders.
      PubDate: 2017-04-25T07:26:14.541554-05:
      DOI: 10.1002/ajmg.a.38217
       
  • Unclassifiable pattern of hypopigmentation in a patient with mosaic
           partial 12p tetrasomy without Pallister–Killian syndrome
    • Authors: Viola Alesi; Maria L. Dentici, Fabrizia Restaldi, Valeria Orlando, Maria T. Liambo, Chiara Calacci, Rossella Capolino, Maria C. Digilio, May El Hachem, Antonio Novelli, Andrea Diociaiuti, Bruno Dallapiccola
      First page: 1943
      Abstract: Pallister–Killian syndrome (PKS-#OMIM601803) is a multisystem developmental disorder typically due to the presence of an aneuploidy cell line, consisting of a supernumerary tetrasomic chromosomal marker (SCM) arisen from the short arm of chromosome 12 (12p isochromosome). The clinical phenotype, which is strictly related to the percentage and tissue distribution of aneuploid cells, is characterized by craniofacial dysmorphisms, pigmentary skin anomalies, limb shortening, congenital heart defects, diaphragmatic hernia, hypotonia, intellectual disability, and epilepsy. We report on a 4 year-old girl harboring a 12p partial isochromosome, involving the PKS critical region, affecting about 70% of circulating lymphocytes, urine, and saliva cells and fibroblast from a hyperpigmented skin spot, and 100% of fibroblasts from a hypopigmented skin spot. Interestingly, despite the high proportion of affected cells this patient did not present with PKS, and a pattern of linear and patchy pigmentary mosaicism was the sole clinical manifestation. The present observation suggests that partial 12p SCM can also result in mild phenotypes, and its prevalence in the human population could have been underestimated. Accurate dermatologic evaluation could be a major handle for genetic testing.
      PubDate: 2017-05-10T07:30:32.353616-05:
      DOI: 10.1002/ajmg.a.38269
       
  • Left ventricular noncompaction cardiomyopathy in a patient with trisomy
           13: A report and review of the literature
    • Authors: Anri Hayashi; Tomohiro Kumada, Fumihito Nozaki, Ikuko Hiejima, Minoru Shibata, Takashi Kusunoki, Tatsuya Fujii
      First page: 1947
      Abstract: Left ventricular noncompaction cardiomyopathy (LVNC) is characterized by prominent trabecular meshwork, and it is thought to result from arrest of the normal compaction process during embryogenesis. Patients with LVNC may be asymptomatic or have symptoms ranging from heart failure to stroke, life-threatening arrhythmias, or sudden death. The frequency of LVNC in children has increased with longer clinical courses. About 80% of patients with trisomy 13 have a congenital cardiac abnormality, but a clinical description of LVNC with trisomy 13 is lacking because of its poor prognosis and lack of awareness about LVNC. We described a patient with trisomy 13 who was diagnosed with LVNC-dilated phenotype and died suddenly, as well as two additional patients with LVNC. All three patients had chronic heart failure without congenital heart disease and were treated with diuretics. To manage trisomy 13 with or without congenital heart disease, cardiac disease such as LVNC may present at any ages, and therefore cardiac evaluation should be considered as a part of their appropriate management.
      PubDate: 2017-05-09T23:20:34.868709-05:
      DOI: 10.1002/ajmg.a.38270
       
  • PLXNA1 developmental encephalopathy with syndromic features: A case report
           and review of the literature
    • Authors: Kaylee Park; Laurie E. Seltzer, Emily Tuttle, Ghayda M. Mirzaa, Alex R. Paciorkowski
      First page: 1951
      Abstract: Developmental encephalopathies constitute a broad and genetically heterogeneous spectrum of disorders associated with global developmental delay, intellectual disability, frequent epilepsy, and other neurofunctional abnormalities. Here, we report a male presenting with infantile onset epilepsy and syndromic features resembling Dubowitz syndrome identified to have a de novo PLXNA1 variant by whole exome sequencing. This constitutes the second report of PLXNA1 sequence variation associated with early onset epilepsy, and the first to expand on the clinical features of this emerging disorder. This reports suggests that nonsynonymous de novo sequence variations in PLXNA1 are associated with a novel human phenotype characterized by intractable early onset epilepsy, intellectual disability, and syndromic features.
      PubDate: 2017-05-02T10:27:32.804976-05:
      DOI: 10.1002/ajmg.a.38236
       
  • Homozygous microdeletion of the ERI1 and MFHAS1 genes in a patient with
           intellectual disability, limb abnormalities, and cardiac malformation
    • Authors: Nancy Choucair; Mariam Rajab, André Mégarbané, Eliane Chouery
      First page: 1955
      Abstract: A male child, born from consanguineous parents and having intellectual disability, short stature, dysmorphic facial features, synpolydactyly, and cardiac malformations is reported. Chromosomal microarray analysis showed that the patient presents with an 8p23.1 homozygous deletion, containing the microRNA miR-4660, the exoribonuclease 1 (ERI1), and malignant fibrous histiocytoma amplified sequence 1 (MFHAS1) genes. The microRNA miR-4660 has no known function. MFHAS1 is an immunomodulatory protein involved in Toll-like receptor signaling, erythropoiesis, and cancer. ERI1 is a ribonuclease involved in RNA metabolism and is required for the correct patterning of the skeleton by defining the HOXC8 expression. We discuss the involvement of these deleted genes to the patient's features and highlight differential diagnoses with syndromes implicating limb extremity abnormalities such as synpolydactyly, including the monosomy 8p.
      PubDate: 2017-05-09T23:20:49.314684-05:
      DOI: 10.1002/ajmg.a.38271
       
  • Incidence, puberty, and fertility in 45,X/47,XXX mosaicism: Report of a
           patient and a literature review
    • Authors: Han Hyuk Lim; Hong Ryang Kil, Sun Hoe Koo
      First page: 1961
      Abstract: Turner syndrome (TS), characterized by short stature and premature ovarian failure, is caused by chromosomal aberrations with total or partial loss of one of the two X chromosomes. Spontaneous puberty, menarche, and pregnancy occur in some patients depending on the abnormality of the X. Moreover, spontaneous pregnancy is uncommon (
      PubDate: 2017-05-09T07:15:53.349961-05:
      DOI: 10.1002/ajmg.a.38276
       
  • Expanding the phenotypic spectrum of truncating POGZ mutations:
           Association with CNS malformations, skeletal abnormalities, and
           distinctive facial dysmorphism
    • Authors: Maria Lisa Dentici; Marcello Niceta, Francesca Pantaleoni, Sabina Barresi, Paola Bencivenga, Bruno Dallapiccola, Maria Cristina Digilio, Marco Tartaglia
      First page: 1965
      Abstract: Exome sequencing has led to the comprehension of the molecular bases of several forms of neurodevelopmental disorders, a clinically heterogeneous group of diseases characterized by intellectual disability (ID) and autism spectrum disorder (ASD). De novo mutations in POGZ has been causally linked to isolated ASD and syndromic ID, only recently. Here we report on a 15 year-old girl in whom exome sequencing allowed to identify a de novo POGZ truncating mutation as the molecular cause underlying a complex phenotype apparently not fitting any recognized syndrome. We describe the evolution of her clinical features with age, and review published clinical data of patients with POGZ mutations to systematically analyze the clinical spectrum associated with mutations. Our finding expands the clinical and molecular spectrum of POGZ mutations. Revision of the literature indicate that moderate to severe ID, microcephaly, variable CNS malformations, reduced growth, brachytelephalangy, and facial dysmorphism represent recurrent features associated with POGZ mutations.
      PubDate: 2017-05-07T20:05:54.510101-05:
      DOI: 10.1002/ajmg.a.38255
       
  • Phenotypic expression of 19q13.32 microdeletions: Report of a new patient
           and review of the literature
    • Authors: Laura Travan; Samuele Naviglio, Angela De Cunto, Andrea Pellegrin, Vanna Pecile, Alessandro Mauro Spinelli, Stefania Cappellani, Flavio Faletra
      First page: 1970
      Abstract: The phenotypic manifestations of microdeletions in the 19q13.32 region are still poorly known. In this paper we report a patient who presented with hypotonia, developmental delay, facial dysmorphism, micrognathia, kyphoscoliosis, and buried penis. Chromosomal microarray revealed an interstitial 327 kb de novo microdeletion in the 19q13.32 region comprising eight genes (ARGHAP35, NPAS1, TMEM160, ZC3H4, SAE1, BBC3, MIR3190, and MIR3191). Previously reported cases of microdeletions in the 19q13.32 region were reviewed and compared to our patient, highlighting the common features of a possible 19q13.32 microdeletion syndrome.
      PubDate: 2017-04-14T21:35:32.338112-05:
      DOI: 10.1002/ajmg.a.38256
       
  • Recurrent ATP2A2 p.(Pro602Leu) mutation differentiates Acrokeratosis
           verruciformis of Hopf from the allelic condition Darier disease
    • Authors: Anne Ronan; Angela Ingrey, Natalia Murray, Paul Chee
      First page: 1975
      Abstract: Darier disease and Acrokeratosis Verruciformis of Hopf (AKV) are rare disorders of keratinization with autosomal dominant inheritance and very distinct clinical pictures. Both have been shown to be caused by mutations in ATP2A2 (ATPase, Ca++ transporting, cardiac muscle, slow-twitch) a gene encoding one of the SERCA (sarcoplasmic/endoplasmic reticulum calcium ATPase2) intracellular pumps with a crucial role in cell-to-cell adhesion in both skin and heart. While hundreds of different missense and nonsense mutations cause Darier disease, only one missense mutation, p.(Pro602Leu), has been identified in families with AKV. We report a family with AKV due to the p.(Pro602Leu) mutation and discuss implications for this recurrent mutation on knowledge of ATP2A2 structure and function.
      PubDate: 2017-05-12T09:06:36.221724-05:
      DOI: 10.1002/ajmg.a.38268
       
  • A rapid gene sequencing panel strategy to facilitate precision neonatal
           medicine
    • Authors: Luca Brunelli; Rong Mao, Sabrina Malone Jenkins, Steven B. Bleyl, Shale A. Dames, Christine E. Miller, Betsy Ostrander, Tatiana Tvrdik, Seth Andrews, Josue Flores, Shrena Patel, James M. Gudgeon, Susan Schaefer
      First page: 1979
      PubDate: 2017-05-12T00:29:44.638898-05:
      DOI: 10.1002/ajmg.a.38259
       
  • Artificial reproductive techniques and epigenetic alterations: Additional
           comments to the article by Arcos-Machancoses et al. ()
    • Authors: Antonio Pérez-Aytés; José V. Arcos-Machancoses, Purificacion Marin Reina, M. Teresa Jimenez Busselo, Francisco Martínez
      First page: 1983
      PubDate: 2017-05-09T23:20:32.224498-05:
      DOI: 10.1002/ajmg.a.38273
       
  • Response to: Toriello et al., “Update on the Toriello–Carey
           Syndrome.” Further delineation of a young woman with deletion
           1q42.12-q42.2
    • Authors: Alexandra Garza-Flores; Pamela Hawley, Jonathan Picker, Elizabeth Tannebring, Matthew A. Deardorff, Angela E. Lin
      First page: 1988
      PubDate: 2017-04-26T23:40:35.091187-05:
      DOI: 10.1002/ajmg.a.38203
       
  • Response to: Milosavljevic et al. “Two cases of RIT1 associated Noonan
           syndrome: Further delineation of the clinical phenotype and review of the
           literature”
    • Authors: Blair Stevens; Anthony Johnson, Thomas Rowe, Rebecca Carter, Roopali Donepudi
      First page: 1992
      PubDate: 2017-05-05T08:50:28.009943-05:
      DOI: 10.1002/ajmg.a.38249
       
  • Novel features of Helsmoortel–Van der Aa/ADNP syndrome in a boy with a
           known pathogenic mutation in the ADNP gene detected by exome sequencing
    • Authors: Chumei Li; Yongdong Wang, Marta Szybowska
      First page: 1994
      PubDate: 2017-05-05T08:50:23.714019-05:
      DOI: 10.1002/ajmg.a.38201
       
 
 
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