Ultrasound: a powerful tool in the diagnosis of ulnar collateral ligament injuries of the thumb.

Proper treatment for injuries to the ulnar collateral ligament (UCL) of the metacarpophalangeal joint of the thumb relies on an accurate diagnosis of the pathology of the ligament. The current study evaluates the accuracy of ultrasonography to diagnose the specific pathology related to UCL injuries. The charts of 16 patients who underwent 21 studies of the UCL were reviewed.