[Rupture of extensor tendons due to chronic post-traumatic distal radio-ulnar dislocation. Case report].

Introduction: We report a case of extensor tendon rupture due to chronic post-traumatic distal radioulnar dislocation. These lesions are frequent in rheumatic and arthrotic wrists due to dorsal capsule rupture and tendon erosion by the ulnar head. An identical mechanism was involved in this case.