原发性肺平滑肌肉瘤极为少见。１９８０年～１９９８年共收治５例术前诊断为周围型肺癌，术后病理证实为原发性肺平滑肌肉瘤的患者，现报告如下。方法　一般资料：本组５例均为男性。年龄５６岁～６７岁，平均（６２．４±５．９）岁，病程从２个月～４年。４例病变部位在左上 Primary pulmonary leiomyosarcoma is extremely rare. From 1980 to 1998, a total of 5 cases of preoperative lung cancer were diagnosed as peripheral lung cancer. The pathologically confirmed primary pulmonary leiomyosarcoma was reported as follows. Methods General Information: 5 patients in this group were all male. Ages 56 to 67 years, mean (62.4±5.9) years, duration from 2 months to 4 years. 4 cases of lesion in the upper left