恶性纤维组织细胞瘤是一类好发于腹腔及腹膜后的恶性肿瘤。原发于肺部者很少见。作者报道5例,就其临床病理特点进行简要的讨论分析。临床资料本组5例,均系男性,年龄21岁～63岁。左上肺3例,右肺上、下叶各1例。病史3个月～3年。以胸痛、胸闷、咳嗽、咳痰、痰中带血及肺部块影为主 Malignant fibrous histiocytoma is a type of malignant tumor that occurs in the abdominal cavity and retroperitoneum. Primarily in the lungs are rare. The author reported 5 cases and briefly discussed the clinical and pathological features. Clinical data in this group of 5 cases, all male, age 21 to 63 years old. There were 3 cases of left upper lung and 1 case of right upper lung and lower lobe. History of 3 months to 3 years. Chest pain, chest tightness, cough, sputum, sputum blood and lung block shadow