Clinical Study of Combined Radical Operation With Postoperative Adjuvant Chemotherapy and Prophylactic Cranial Irradiation in pT1-2N0M0 Stage of Small Cell Lung Cancer

Patients in the control group are enrolled in the follow-up, and the patients in research group will receive prophylactic cranial irradiation （PCI） by 25 gy/10 fx.

lobectomy + mediastinal lymph node dissection or systematic lymph node sampling

If the postoperatively pathological examination of the patient is confirmed to be in pT1-2N0 stage, a single postoperative adjuvant chemotherapy (combining etoposide with cisplatin) is recommended. If patients are difficult to tolerate the side effects of cisplatin, we can replace cisplatin by carboplatin in the adjuvant chemotherapy scheme.