徐经世教授认为气阴亏虚是肺癌的基础病机,特别是肺癌晚期、放化疗术后的患者,脾胃虚弱对肺癌的病机变化具有重要影响.治疗应以益气养阴、培土生金为大法,扶助正气,整体调节,协调脏腑.徐教授临证用药轻灵,药性缓和,强调肺司宣通,注意翕辟,取得较好疗效.“,”Professor XU Jingshi believes that qi and yin deficiency is the basic pathogenesis of lung can-cer,especially in patients with advanced lung cancer. After radiotherapy and chemotherapy,the weakness of spleen and stomach has an important influence on the changes of pathogenesis of lung cancer. He points out supplementing qi and nourishing yin,reinforcing the earth to generate the metal should be the main methods in treatment of the disease,because these methods can reinforce the healthy qi,regulate the function of the whole body and promote the coordination of the viscera. The medicine used by Professor XU is light and skillful in nature,mild and slow in effect. In clinical treatment,he pains attention to the dispersing,ventilat-ing,opening and closing function of the lung,which has achieved good curative efficacy.