肺原发性平滑肌肉瘤(primary leiomyosarcoma of the lung)较罕见,1907年Davisohn首次报告以来。陆续有病例报告,国内文献报告12例(1～8)。现将两院3例(徐医1例,兰军医2例)报告如下: 例1:男,57岁。咳嗽、左胸痛、痰中偶带血丝二周。胸片发现左下肺肿块,拟诊左下肺癌 Primary leiomyosarcoma of the lung is rare and was first reported in 1907 by Davisohn. There are case reports one after another, domestic reports of 12 cases (1 to 8). Three cases in the two hospitals (1 in Xu Yi and 2 in Lan Jun) are reported as follows: Example 1: Male, 57 years old. Cough, left chest pain, sputum occasionally bloodshot for two weeks. The left chest mass was found on the chest radiograph and the left lower lung cancer was diagnosed