[Mediocarpal instability].

The author reports his personal experience of eleven cases of midcarpal instability. Diagnosis was essentially based on dynamic radiological investigations of the wrist with distraction and posterior "drawer" movements. Damage to the anterior capsuloligamentous complex is the underlying cause. According to the predominance on the ulnar or radial side, one may speak of anteromedial or anterolateral midcarpal instability. Management differs in the case of recent injuries which should be treated on a nonoperative basis as compared to the case of longstanding lesions whose treatment is difficult. It seems as though only intercarpal arthrodesis is the solution to adequate stabilization of the lesions. To avoid loss of motion, the author suggests the possibility of palliative treatment by arthroplastic resection of the proximal row of the carpus, which, in this type of indication, seems to be a last resort.