گزارش 1 مورد بیمار مبتلا به سینوویال کندروماتوزیس زانو

Synovial chondromatosis is a rare neoplastic condition which usually involves major joints. This tumor is a cartilaginous metaplasia which occurs within synovial membrane of joint or tendon sheets. Multiple cartilaginous nodules can become free from synovial membrane and float in the joint space. X-Ray almost always shows multiple calcified areas so evidently that usually diagnosis can be established preoperatively. The patient of the present report is a 20-year-old male who referred with knee problems which he had for about 4 years. There was no evidence of boney calcification or erosion in radiography of his knee. Biopsy was taken from his knee mass which reported sunovial cyst with chondromatosis changes. In arthrotomy no loose body was found. Only a large mass about 10cm in diameter, which was attached to synovial membrane and capsule, was found and excised. This case is an uncommon manifestation of a rare disease.