Intra-articular inflammatory diseases of the shoulder

Intra-articular disease processes of the shoulder are uncommon. Of all the processes, adhesive capsulitis is by far the most prevalent. Stage 1 of adhesive capsulitis mimics the impingement syndrome and must be ruled out by arthroscopy before decompression is performed. Other rare conditions of the shoulder joint, such as pigmented villonodular synovitis and synovial chondromatosis, can be treated with the same surgical techniques.