中文摘要：

目的探讨青年病理确诊肺癌患者的临床特征。方法回顾性分析33例年龄≤45岁肺癌患者的临床资料。结果青年肺癌患者的临床症状多半不典型。病理诊断以腺癌居多（66．7％），肿瘤分化程度不高，预后较差。结论青年肺癌患者以腺癌多发，预后较差，需提高认识，早期诊治，以改善预后。

英文摘要：

Objective To investigate the clinical features of young patients with lung cancer confirmed pathologically. Methods The clinical data of 33 young（≤45 years old） patients with lung cancer treated by surgery were retrospectively analyzed. Results The young patients with lung cancer usually lacked for typical clinical manifestations. Of 33 patients, 22（66.7%） cases were diagnosed as , the majority of which were lowerly differentiated and with poor prognosis. Conclusion The clinical symptoms of young patients with lung cancer are not typical, who are with poorer prognosis. Early diagnosis and treatment are helpful in improving the prognosis.