Lateral epicondylitis: anatomic relationships of the extensor tendon origins and implications for arthroscopic treatment.

The purpose this study was to provide an understanding of the location of the extensor carpi radialis brevis (ECRB) and its relationship to surgically relevant landmarks. In part I, 20 fresh-frozen cadaveric elbows were dissected, and the anatomic boundaries of the ECRB origin were determined, including its relationship to the extensor carpi radialis longus, the extensor digitorum communis, the lateral epicondyle, the radiocapitellar joint, the lateral collateral ligament, and the elbow capsule. All measurements were made by 3 separate investigators.