近廿年来肺癌的总生存率并未显著提局,主要原因是大多数病例待确诊后已属中、晚期。凡瘤体直径在2cm以内,局限于支气管壁尚来外侵又无转移者,经手术切除后五年生存率达90％左右,可是临床上受诊的肺癌病例,适于手术切除者仅占肺癌总数的25％左右,可见肺癌早期诊断的重要性。为此,现将有关肺癌早期诊断问题,简述于后以供探 The overall survival rate of lung cancer in recent years has not been significantly raised, the main reason being that most cases are already in the middle and late stages after diagnosis. All tumors within 2cm in diameter, confined to the bronchial wall are still invasive and no metastasis, the survival rate after surgical resection is about 90%, but clinically diagnosed lung cancer cases, only suitable for surgical resection About 25% of the total number of lung cancers shows the importance of early diagnosis of lung cancer. To this end, the issue of early diagnosis of lung cancer is briefly described hereafter.