Two patients developed chondrolysis following injection of 0.4% aqueous gentian violet into the glenohumeral joint to visualize a rotator cuff tear during surgery. In both cases, conventional radiographs revealed joint space narrowing 10-12 months after surgery. Histological examination of the humeral heads revealed loss of the articular cartilage.Résumé Deux patient s ont développé une chondrolyse à la suite d'une injection de violet de gentiane à 0.4% dans l'articulation glénohumérale pour visualiser une lé-sion de la coiffe pendant une intervention. Dans les deux cas, les radiographies conventionnelles ont montré s une diminution de l'interligne articulaire 10-12 mois après la chirurgie. L'examen histologique des têtes humérale a révélé une perte du cartilage articulaire.
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