恶性纤维组织细胞瘤(以下简称MFH)多发生于四肢及软组织。发生于肺内组织者在国外或国内报道极少,实属罕见病例。本文报告1例如下: 男性,67岁,反复咳嗽、吐痰20余年,咯血,痰中带血2个月;不吸烟胸部透视:右下肺野呈团块状阴影,边界不清,约4×4大小。经纤维支气管镜检查:见右中支气管下段、下叶支气管开口处有息肉样组织突起。活检组织病理学报告:低分化腺癌。经北京首都医院 Malignant fibrous histiocytoma (hereinafter referred to as MFH) mostly occurs in limbs and soft tissues. There are very few cases of organizing in the lungs reported abroad or in the country. This is a rare case. The report 1 is as follows: Male, 67 years old, repeatedly coughing, spitting for more than 20 years, hemoptysis, sputum with blood for 2 months; non-smoking chest perspective: the right lower lung field was a mass of shadow, the border is unclear, about 4 ×4 size. After fiberoptic bronchoscopy: see the right middle bronchus, lower bronchial opening of the polypoid tissue protrusions. Biopsy histopathology report: poorly differentiated adenocarcinoma. Beijing Capital Hospital