Disruption of the ulnolunate ligament as a cause of chronic ulnar wrist pain.

Chronic ulnar wrist pain is both difficult to diagnose and difficult to treat effectively. A number of anatomic derangements have been reported as potential causes of this pain. We discuss a patient with pain on the ulnar side of the wrist and an arthroscopically diagnosed disruption of the ulnolunate ligament. This was an isolated lesion, and the patient responded well to debridement.