凡是由恶性肺肿瘤所致的气胸，或肺癌与气胸并存，排除其它肺部疾患所致，均称为癌性气胸[1]。癌性气胸极为少见，我院近20年共发现6例，报告如下。1临床资料6例中男4例，女2例；年龄46～70岁，平均58岁。6例均有长期大量吸烟史。有刺激性干咳3例；间歇性咯血痰4例；均有胸痛。 Any pneumothorax caused by malignant lung tumors, or lung cancer and pneumothorax coexist, excluding other lung diseases caused by, are known as cancerous pneumothorax [1]. Cancerous pneumothorax is extremely rare and was found in 6 cases in our hospital in the past 20 years. The report is as follows. 1 clinical data in 6 cases of 4 males and 2 females; aged 46 to 70 years, mean 58 years old. All 6 patients had long-term smoking history. There were 3 cases of irritating dry cough, 4 cases of intermittent hemoptysis, and chest pain.