head. The extensor aponeurosis is identified and a longitudinal incision is made to visualize the extensor group. The extensor carpi radialis longus is then retracted back to visualize the brevis tendon. The pathologic tissue usually includes the origin of the extensor carpi radialis brevis and less frequently the anterior extensor aponeurosis or extensor longus. The pathologic tissue is then excised. Often osteotome decortication of the exposed lateral epicondyle is performed to