在我国恶性肿瘤发病率和死亡率的调查中 ,发现近几年肺癌的死亡率上升最快 ,其中肺腺癌的发生有升高趋势〔1〕。西方国家的研究也发现肺腺癌尤其周围型腺癌的发生率增高 ,而鳞癌相对减少。肺腺癌的主要类型一直是周围型〔2〕。周围型腺癌的临床病理特点不同于其它类型包括支气 In the investigation of the incidence and mortality of malignant neoplasms in China, it was found that the mortality rate of lung cancer rose most rapidly in recent years, and the occurrence of lung adenocarcinoma has an increasing trend [1]. Studies in Western countries have also found that the incidence of lung adenocarcinoma, especially peripheral adenocarcinoma, is increased, while squamous cell carcinoma is relatively reduced. The main type of lung adenocarcinoma has always been the peripheral type [2]. The clinicopathological features of peripheral adenocarcinoma are different from other types including bronchial