肺癌的发病率在多数国家仍在不断增高 ,在发达国家不论男女均已占常见肿瘤的首位。我国沿海城市肺癌在男性中已占首位 ,在女性中居第 2位或第 3位[1] 。在慢性肺部疾病的基础上并发肺癌时 ,常易误漏诊。本人收集了从 1995年 1月到 2 0 0 0年12月收住院的慢性肺病合并肺癌 30例 The incidence of lung cancer is still increasing in most countries. Both men and women in developed countries have become the most common tumors. The lung cancer in the coastal cities of China has taken the first place among men and ranks second or third among women [1]. When chronic lung disease is complicated by lung cancer, it often leads to misdiagnosis. I collected 30 cases of chronic lung disease complicated with lung cancer admitted from January 1995 to December 2000