From 1983 to 1987

59 patients with lung cancer were IreaLcd by postoperative radiotherapy

including 48 males and 11 females. Among them

21 cases were in stage I

18 in stage II

19 in stage III and 1 in stage IV. Radiation therapy was administered through parallel opposed AP-PA portals. The treatment volume included the entire width of the mediastinum

homolalcral hili and the region of residual cancer. The tumor dose was mostly around 5000-5500 cGy. The overall 1-

3-

and 5- year survival rates were 71.20%

37.28% and 28.89% respectively. The 5- year survival rates for potients with involvement of resection margins and regional nodes were 28.57% and 20.00% respectively

and were compared with 40.00% for patients without nodes metastases. The 5-year survival rate of squamous cell careinoma and small cell anaplastic carcinoma was significantly better (P<0.01). Our result indicated that postoperative radiation therapy for lung cancer should be a potential benefit