Results of arthroscopic subacromial decompression in patients with subacromial impingement and glenohumeral degenerative joint disease.

The purpose of this study was to determine the efficacy of shoulder arthroscopy with subacromial decompression in patients with concurrent glenohumeral arthrosis. A retrospective review of 36 patients who had arthroscopic subacromial decompression with concurrent glenohumeral degenerative joint disease was conducted. Office charts, operative notes, standard shoulder questionnaires, radiographs, and clinical examinations were used. The mean age of patients was 61 years, with 5-year follow-up. Patients with Outerbridge grade 1, 2, or 3 changes on either the glenoid or humerus had a mean final L'Insalata score of 90. Ten patients with grade 4 changes registered an ultimate score of 50. Radiographic arthrosis correlated similarly but with less reliability. Arthroscopic subacromial decompression for resistant impingement symptoms in the face of mild to moderate glenohumeral degenerative joint disease can improve shoulder function and provide durable results. Full-thickness loss of articular cartilage or radiographically severe degenerative joint disease had less predictable results.