随着人口老龄化速度的加快和生存环境的变化,肺癌对人口的发病和致死率的影响日益显现,早期发现、早期诊断、正确分期和合理治疗对于延长肺癌患者的寿命、改善其生存质量具有十分重要的意义。肺癌影像学的诊断和鉴别诊断至关重要。病理学把肺癌分为小细胞肺癌 With the accelerated aging of the population and changes in the living environment, the impact of lung cancer on the incidence and mortality of the population has become increasingly apparent. Early detection, early diagnosis, correct staging and rational treatment have the potential to prolong the life of lung cancer patients and improve their quality of life Very important meaning. Diagnostic and differential diagnosis of lung cancer is essential. Pathology of lung cancer is divided into small cell lung cancer