The overall 5 year survival rate (OS), disease free survival rate (DFS), distant metastasis free rate(DMF)and local regional free rate (LRF) were 57.1%, 52.9%, 61.0% and 83.3%, respectively.

• 5年总生存率 (OS)为 5 7.；1%25；5年无瘤生存率 (DFS)为 5 2