Chronic ulnar wrist pain secondary to partial rupture of the extensor carpi ulnaris tendon.

An unusual case of symptomatic partial rupture of the extensor carpi ulnaris (ECU) tendon after trauma is described. The patient was successfully treated by surgical removal of a prominent ulnar ridge, debridement of the ECU tendon, and ECU subsheath reconstruction. Extensor carpi ulnaris subluxation and partial rupture should be considered in the differential diagnosis of a patient with chronic ulnar wrist pain.