Lung cancer is one of ordinary malignant tumors for human being.The key of treating it is early diagnosis and to perform sputumentum exfoliative cytologic examination.

• 肺癌是人类常见的恶性肿瘤之一,治疗肺癌的关键在于早期诊断,而早期诊断的主要手段之一就是痰液脱落细胞学检查。