The significance of the os trigonum.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D050723:Fractures, Bone; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D013628:Talus / Q000000981:diagnostic imaging / Q000293:injuries / Q000601:surgery