I--triphalangeal thumbs in three sibs.
D002648:Child; D002675:Child, Preschool; D000013:Congenital Abnormalities / Q000235:genetics; D005260:Female; D005384:Finger Joint / Q000002:abnormalities; D006225:Hand / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D011859:Radiography; D013933:Thumb / Q000002:abnormalities*