肺炎性假瘤是一种肺实质内以炎性肉芽组织为主的瘤样病变。临床上少见 ,因组织学表现复杂 ,缺乏特异性的临床表现及影像学征象 ,易误诊为肺癌、结核瘤、肺错构瘤等。我们自 1991年 1月～ 2 0 0 1年 12月共收治 73例肺炎性假瘤患者 ,其中 49例误诊为其他肺肿瘤 ,误诊率达 67.1% Pneumothorax pseudotumor is a pulmonary parenchyma with inflammatory granulation tissue-based tumor-like lesions. Clinically rare, due to the complexity of histological manifestations, the lack of specific clinical manifestations and imaging signs, easily misdiagnosed as lung cancer, tuberculosis, pulmonary hamartoma and so on. From January 1991 to December 2001, we treated 73 patients with pneumoconiosis, of which 49 were misdiagnosed as other lung tumors, with a misdiagnosis rate of 67.1%