Short broad thumbs and mental retardation in two brothers without facial dysmorphia.
D002648:Child; D006801:Humans; D008607:Intellectual Disability / Q000150:complications / Q000235:genetics*; D008297:Male; D009264:Nails, Malformed; D012640:Seizures / Q000150:complications / Q000235:genetics; D013577:Syndrome; D013933:Thumb / Q000002:abnormalities*