患者桑某,男,14岁,因发现腰部肿物半年来诊。查体:左腰背部可触及约3 cm×3 cm大小圆形肿物,质韧,活动度不佳。在我院门诊手术室局麻下行左腰部肿物切除术,术中见肿物质韧,切开后剖面成乳白色,无脂肪组织及豆渣样物。术后送病理检查显示:外周神经纤维瘤。其父曾有“脑膜瘤、听 Sang Mou, male, 14 years old, because of the discovery of lumbar tumor for six months. Physical examination: left back and back can reach about 3 cm × 3 cm size round tumor, quality toughness, poor mobility. In our hospital outpatient operating room local anesthesia down the left lumbar tumor resection, intraoperative see tumor mass toughness, incised section into milky white, no adipose tissue and bean dregs samples. Postoperative pathological examination showed: peripheral neurofibroma. His father had "meningioma, listen