関節内索状物切除後に随意性肩関節脱臼が消失した一症例

抄録

Treatment of voluntary dislocation of the shoulder is generally difficult. We experienced a ten-year-old boy of voluntary dislocation of left shoulder with intra-articular abnormal band. He has had a painful shoulder from time to time since two years ago, and noticed his shoulder dimple. He was admitted to our university hospital in Feburary,1987. Physical examination revealed tenderness in left bicipital groove, limited elevation due to pain, and Yargason test was positive. In X-ray view inferior instability was 68%, even though it was not under general anesthesia. Arthroscopic examination was performed. Cartilage of humeral head and glenoid were clear. Three glenohumeral ligaments were intact. Abnormal band run like a bandle from the supraglenoidal region to superior intracapsule. In arthroscopic findings the band suspended biceps long head tendon by interior traction of arm. And so the band was resected by arthroscopic surgery. Two days after operation, he forgot to dislocate shoulder by his own will. The glenohumeral angle (θ) of postoperative X-ray was compared with that of preoperative one. That angle of postoperative X-ray increased. It was thought that the pathology in this case was an improvement of scapula abduction.