The IL-2 was given 500000 IU 3 times a week (Monday, Thursday, Friday) by intratumorally injection in solution of 1ml normal saline.

• . 9%25生理盐水 1ml溶解稀释IL - 2 50万U；放疗前 3 0min瘤体内局部注射；每周 3次；(周 1、3、5)。