[Arthroscopy of post-traumatic shoulder pain].
Thirty-two consecutive patients suffering chronic shoulder pain for more than six months after a non-dislocating shoulder trauma were examined clinically and with arthroscopy of the shoulder. The trauma was blunt or simple distortion of the shoulder. The patients complained of pain during loading, especially during over the head activities. Symptoms of dead arm and feeling of instability with a popping sensation inside the shoulder were also present. Patients with previous dislocations, trauma or radiographic signs of degenerative shoulder lesions were excluded. Clinically, 21 patients had decreased range of motion, 19 patients had a positive anterior apprehension sign and four of these had signs of shoulder instability. Nine patients had signs of impingement. The suspected preoperative diagnoses included a tear of the rotator cuff (17), a tear of the labrum (12), tendinitis of the biceps tendon (2) and periarthrosis of the shoulder (1). Arthroscopic findings consisted of 22 labral tears, six partial and three total rotator cuff lesions and three cases of synovitis of the rotator cuff with signs of subacromial impingement. Four patients had tendinitis of the biceps tendon. One patient had a lesion of the greater tubercle. Only two shoulders were found to be unstable under anaesthesia. In conclusion, patients with posttraumatic chronic shoulder pain after a non-dislocating trauma of the shoulder should be evaluated with arthroscopy in order to diagnose possible intraarticular lesions.