1　临床资料　　我科曾收治一名患者 ,于右臀下方发现一较大肿物 ,经手术及术后病理诊断为滑膜肉瘤且严重侵蚀坐骨神经 ,导致右下肢功能丧失 ,现报告如下。患者　男 ,68岁。缘于 1个月前提重物后感到右下肢疼痛 ,用手触摸右侧臀下方 ,摸及一包块 ,小腿及足有麻痛感 ,现发现包块 1 Clinical data One patient was admitted to our department and a large mass was found below the right hip. Synovial sarcoma was diagnosed by surgery and postoperative pathology and severely eroded the sciatic nerve, resulting in loss of right lower limb function. The report is as follows. Male patient, 68 years old. Due to the weight of the right lower limb after 1 month of heavy lifting, touch the right hip below the hand and touch a mass. The calf and the foot have numbness.