作者报道4例气胸合并原发性支气管癌。例1 男,71岁。厌食,体重下降,胸片发现右肺萎陷,肺复张过程中出现右侧气胸,支气管镜检发现右主支气管有坏死性肿瘤为小细胞未分化癌。例2 男,55岁。体重下降,咳嗽,呼吸困难,胸片发现左侧气胸,左上叶部份萎陷,经左肺切除,发现左主支气管有分化不良型鳞癌,未查见胸膜受损处。例3 男,62岁。胸痛,呼吸困难,胸片见左侧 The authors reported 4 cases of pneumothorax combined with primary bronchial carcinoma. Example 1 Male, 71 years old. Anorexia, weight loss, chest radiograph found right lung collapse, right pulmonary pneumothorax during lung recruitment, bronchoscopy found necrotic tumor of the right main bronchus for small cell undifferentiated carcinoma. Example 2 Male, 55 years old. Weight loss, cough, dyspnea, chest radiographs revealed a left side pneumothorax, left upper lobe partially collapsed, left lung resection, found that the left main bronchus had poorly differentiated squamous cell carcinoma, did not check the pleural lesions. Example 3 Male, 62 years old. Chest pain, difficulty breathing, see chest X-ray