Simultaneous metacarpophalangeal joint ulnar collateral ligament injury and carpometacarpal dislocation of the thumb in a football player: a case report.

An unusual case of ulnar collateral ligament avulsion in association with carpometacarpal dislocation of thumb is described. Symptoms and deformity caused by dislocation can mask the presence of injuries such as damage to the ulnar collateral ligament of thumb. This may lead to long term disability. A high index of suspicion and good clinical examination allows correct diagnosis and management of these uncommon injuries leading to a good clinical outcome.