Recurrent posterior subluxation of the shoulder.

The rare posterior form of instability syndrome of the shoulder is taken into consideration. A diagnostic protocol aimed at revealing posterior slipping of the humeral head following spontaneous movement or with stress is suggested; this involves semiological maneuvers, and the help of radiographs in specific projections and CT scan. As for treatment, the importance of physiatric treatment is emphasized, and surgery advised in young patients who do not benefit from conservative treatment. The authors prefer posterior capsulomyoplasty associated with posterior glenoplasty in forms of the pathology characterized by excessive glenoid retroversion. Finally, 4 personal cases are presented.