慢性支气管炎合并肺癌有时极易误诊 ,这在医学文献上都曾有多次报道 ,归纳起来大概有以下原因 :1　临床症状 :慢性支气管炎主要症状是长期咳嗽、咯痰、偶尔痰中带有血丝 ,而肺癌早期缺乏特异性临床表现 ,也往往表现为干咳及痰中带血丝 ,因此 ,临床上很容易将肺癌的症状误认为慢 Chronic bronchitis with lung cancer is often misdiagnosed. This has been reported several times in the medical literature and can be summed up for the following reasons: 1 Clinical symptoms: The main symptoms of chronic bronchitis are chronic cough, expectoration, and occasional spasms. Bloodshot, and lack of specific clinical manifestations in early stage of lung cancer, often show as dry cough and blood stained sputum, therefore, clinically it is easy to mistake the symptoms of lung cancer as slow