The aim of this study was to report that we experienced a case that developed recurrent dislocation of both shoulders. The case was dislocated by a slight force. The case was a 74 year old woman. When she was going to close a sliding door in 1987, she was aware of a dislocation of her right shoulder. She was aware of a dislocation of her left shoulder in the way that she fell down stairs in 1990. She has often dislocated since 2003, and came to our hospital on October,2003. Apprehension tests were positive for both shoulders. She had a general joint laxity in Carter index 3/5. In X-ray, we had an OA change with both shoulders. An arthrogram and MRI showed a rotator cuff rupture. It did not show a Bankart, s lesion. Suture of the rotator cuff was performed in both shoulders. For 57 weeks after the postoperative day, right shoulder did not show a dislocation. For 42 weeks after the postoperative day, the left shoulder did not show any dislocation. Apprehension tests were negative for both shoulders. The postoperative observation period was short, but the person herself was satisfied. When we first thought about this case, we thought it would reject a Bankart lesion. Slipping phenomenon of the humeral head was presumed, because the case had a general joint laxity. It lost the function of joint stability with the rotator cuff tear, and that the humeral head slid into the scapular inferior margin.
