Anomalous insertion of the flexor pollicis longus.
D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D009068:Movement; D009132:Muscles / Q000002:abnormalities* / Q000601:surgery; D011859:Radiography; D013710:Tendons / Q000002:abnormalities* / Q000601:surgery; D013933:Thumb / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000601:surgery