恶性纤维组织细胞瘤是组织细胞瘤的一种。现将一例经手术病理征实的后腹膜恶性纤维组织细胞瘤介绍如下:患者女性,32岁。发现上腹部肿物1月余而就诊,起初发现肿物时有核桃大小,自觉肿物增长较快。不伴疼痛、发烧、乏力等症状。体检:中上腹部剑突下可触及一约6cm×3cm 大小的肿物,质硬,表面欠光滑, Malignant fibrous histiocytoma is a kind of histiocytoma. A case of retroperitoneal malignant fibrous histiocytoma confirmed by surgery and pathology is now introduced as follows: Female patient, 32 years old. Found more than a month on the abdomen tumor treatment, initially found the size of walnuts when the tumor, the rapid growth of conscious mass. Not accompanied by pain, fever, fatigue and other symptoms. Physical examination: the upper and lower abdominal xiphoid can reach about 6cm × 3cm size of the tumor, hard, less smooth surface,