title: Clinical features and natural history of Beckwith-Wiedemann syndrome: presentation of 74 new cases.
abstract: Beckwith-Wiedemann syndrome (BWS) is a congenital overgrowth syndrome with variable expression. To define the range and frequency of complications in BWS, we have studied a cohort of 76 affected patients (two previously reported). The most frequent complications were macroglossia (97%), abdominal wall defect (80%) and birth weight or postnatal growth > 90th centile (88%). Other common features were ear creases/pits (76%), facial naevus flammeus (62%), nephromegaly (59%) and hypoglycaemia (63%). Rarer complications included hemihypertrophy (24%), moderate/severe developmental delay (4%), congenital heart defects (6.5%), polydactyly (4%), neoplasia (4%) and cleft palate (2.5%). Pre-term labour occurred in 53% and polyhydramnios in 33% of BWS pregnancies. The six deaths all occurred in babies born pre-term, three of whom had major congenital abnormalities. Five patients (6.5%) from four kindreds had an unequivocal family history of BWS, but 15 of 68 apparently sporadic cases had a relative with possible BWS (minor features only). Incomplete penetrance may lead to familial BWS being underdiagnosed.
authors: Department of Clinical Genetics, Addenbrooke's Hospital, Southampton, UK.
authors: M
authors: M
authors: Elliott
authors: R
authors: R
authors: Bayly
authors: T
authors: T
authors: Cole
authors: I K
authors: IK
authors: Temple
authors: E R
authors: ER
authors: Maher
mesh_terms: D000293:Adolescent; D000328:Adult; D001506:Beckwith-Wiedemann Syndrome / Q000235:genetics / Q000503:physiopathology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D006130:Growth Disorders / Q000503:physiopathology; D006330:Heart Defects, Congenital / Q000503:physiopathology; D006801:Humans; D007003:Hypoglycemia / Q000503:physiopathology; D007223:Infant; D007231:Infant, Newborn; D007360:Intelligence / Q000502:physiology; D008297:Male; D009369:Neoplasms / Q000503:physiopathology; D010375:Pedigree