Synovial sarcoma

Synovial sarcoma (synoviosarcoma) is a highly malignant soft tissue sarcoma, originating from mesenchymal cells with synovial differentiation, but rare in the joints. Synovial sarcoma is the fourth most common soft-tissue sarcoma, which occurs most frequently between the ages of 15 and 40. It rarely occurs in the synovium of the joint, but occurs in the soft tissue near the joint, sometimes even away from the joint. Occurs in the extremities, about 70% of which occur in the lower limbs, especially near the knee joint, followed by the feet and ankles, and the upper limbs are mostly elbows. In addition, unrelated parts such as head and neck, abdominal wall, and retroperitoneum can also occur.

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