Irreducible dislocation of the metacarpophalangeal joint of the thumb due to tendon interposition.
Two cases of irreducible dorsal dislocation of the metacarpophalangeal joint of the thumb are reported. In both cases, there was interposition of the tendon of flexor pollicis longus. Open reduction was required to achieve successful reduction.
D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D004204:Joint Dislocations / Q000209:etiology*; D008297:Male; D008662:Metacarpophalangeal Joint; D013708:Tendon Injuries; D013933:Thumb / Q000293:injuries*