A 16-year-old male baseball and football player complained of pain in his right, dominant shoulder after 3 episodes of subluxation over the course of 2 years secondary to diving on the football and baseball fields. He was treated conservatively after each but failed to improve with 4 months of rehabilitation after the third subluxation. He underwent right shoulder arthroscopy in April 2001 at an outside institution for debridement of a posteroinferior labral tear. Figure 1 shows a preoperative radiograph of the affected shoulder. A radiofrequency ablator was used for this debridement. An extensive synovectomy and a coracoacromial ligament resection were also performed with the ablator followed by a modified subacromial decompression. His postoperative course was complicated by poor return of glenohumeral motion and mild to moderate pain with activities of daily living (ADLs). He was unable to return to sports.

His glenohumeral joint was injected 4 months after the procedure with steroid and marcaine. He reported good immediate relief of pain following the injection with relief lasting for only 24 hours. Plain radiography was repeated at 5 months postoperative (Figure 2). It demonstrated significant glenohumeral space narrowing with early subchondral cyst formation in the glenoid. He presented to our clinic for the first time the following week. Range of motion (ROM) at that time was forward elevation to 180°, external rotation with elbow at the side to 60° and internal rotation to L4, and 1+ anterior laxity. Physical therapy was continued, focusing on maintaining glenohumeral ROM.