KBG syndrome Public Deposited

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Creator
  • Morel Swols, Dayna
    • Other Affiliation: Division of Clinical and Translational Genetics, Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, 1501 NW 10th Avenue, BRB-336 (M-860), Miami, FL 33136, USA
  • Foster, Joseph
    • Affiliation: School of Medicine
    • Other Affiliation: John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
  • Tekin, Mustafa
    • Other Affiliation: Division of Clinical and Translational Genetics, Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, 1501 NW 10th Avenue, BRB-336 (M-860), Miami, FL 33136, USA; John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL, USA
Abstract
  • Abstract Clinical Description KBG syndrome is characterized by macrodontia of upper central incisors, distinctive craniofacial features such as triangular face, prominent nasal bridge, thin upper lip and synophrys; skeletal findings including short stature, delayed bone age, and costovertebral anomalies; and developmental delay/intellectual disability sometimes associated with seizures and EEG abnormalities. The condition was named KBG syndrome after the initials of the last names of three original families reported in 1975. Epidemiology The prevalence of KBG syndrome is not established. There are over 100 patients reported in the literature. It is likely that KBG syndrome is underreported due to incomplete recognition and very mild presentations of the disorder in some individuals. KBG syndrome is typically milder in females. Etiology Causative variants in ANKRD11 have been identified in affected individuals. The vast majority of identified variants are loss of function, which include nonsense and frameshift variants and larger deletions at 16q24.3. Haploinsufficiency appears to be the mechanism of pathogenicity. Genetic Counseling Familial and de novo cases have been reported. Causative de novo variants occur approximately one third of the time. Transmission follows an autosomal dominant pattern. The syndrome displays inter- and intra-familial variability.
Date of publication
Identifier
  • doi:10.1186/s13023-017-0736-8
Resource type
  • Article
Rights statement
  • In Copyright
Rights holder
  • The Author(s).
Language
  • English
Bibliographic citation
  • Orphanet Journal of Rare Diseases. 2017 Dec 19;12(1):183
Publisher
  • BioMed Central
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