Two rare involvement sites: synovial chondromatosis.

Synovial chondromatosis (SC) is a rarely encountered benign disease of unknown etiology characterized by multiple joint mouse, as well as metaplastic cartilage points in the joint, bursa and tendon sheaths. Although single joint involvement is frequently encountered, multiple joint involvements may also occur. In this study, two patients with SC in the right shoulder joint and in both ankles were presented, reviewed according to literature.