In 1915 I reported1 six instances of destruction of the tendon of the long head of the biceps. This destruction occurred between the region of the humeral tuberosities and the supraglenoid tubercle of the scapula. In five of these cases, the destruction of the tendon was complete and was accompanied by destructive changes in the capsule of the shoulder joint, on the acromion and the humeral tuberosities, in the glenoid cavity, on the head of the humerus, in the acromioclavicular joint, and even on the internal surface of the deltoid itself. In one case, the sixth, considerable portions of the articular capsule and the entire lesser tuberosity also were destroyed. Yet in this case, the tendon of the long head was only displaced anteriorly and downward, lying along the anterior margin of the glenoid cavity and then passing to the intertubercular sulcus, which it reached a centimeter distal to