肺癌起源于支气管的粘膜上皮。其发病率有逐年增加趋势 ,发病年龄 70 %～ 80 %在 40～ 60岁 ,以50～ 60岁发病率最高 ,30岁以下者则少见 ,偶见于2 0岁以下者。现对我院经手术证实的 1 86例肺癌患者的 X线表现作一分析。1　临床资料　　 1 86例中 ,男性 1 42例 ,女性 44例 ,二者 Lung cancer originates in the mucosal epithelium of the bronchi. The incidence rate has increased year by year. The age of onset is 70% to 80% in the 40 to 60 years old. The incidence rate is the highest in the 50 to 60 years old age group. The patients under the age of 30 are rare and occasionally seen in those under the age of 20. The X-ray findings of 186 lung cancer patients confirmed by surgery in our hospital are analyzed. 1 Clinical data Among 186 cases, 152 were males and 44 were females.