肺原发性恶性纤维组织细胞瘤极罕见。本例曾误诊为良性纤维组织细胞瘤,报告如下。李某,男性,35岁,农民,病理号77—1099。既往身体健康,近1个月有轻微咳嗽,无咳血。1976年6月X线胸透发现肺内有球形病灶,县医院X线胸片诊断肺囊肿,转来本所。 Pulmonary primary malignant fibrous histiocytoma is rare. This case was misdiagnosed as benign fibrous histiocytoma. The report is as follows. Lee, male, 35 years old, farmer, path number 77-1099. He was previously healthy and had mild coughing and hemoptysis in the past 1 month. In June 1976, the X-ray chest was found to have spherical lesions in the lungs. X-ray chest radiographs in the county hospital diagnosed pulmonary cysts and transferred to the Institute.