患者男性，50岁。1996年3月3日因外伤腹腔脏器穿孔手术时发现左侧大网膜6cmX6cmXscm肿块。肿块表面光滑，质轨。切除送病理检查，肉眼见：灰白色圆形肿块，包膜完整。切面灰白色，实性，质初。光镜下：肿瘤由分化好的平滑肌细胞构成、癌细胞呈校形，边界清楚，胞浆丰富，可见纵 The patient is male, 50 years old. On March 3, 1996, a 6cmX6cmXscm mass was found on the left omentum when a traumatic intraperitoneal organ perforation was performed. The surface of the mass is smooth and the mass track. Resection sent for pathological examination, naked eye: grayish white round mass, complete capsule. Cut gray, solid, early quality. Under the light microscope: the tumor is composed of well-differentiated smooth muscle cells, the cancerous cells are shaped, the boundaries are clear, the cytoplasm is abundant, and visible