在恶性肿瘤的放射治疗中，患者受照部位的局部易受到射线的损伤，我们采用维生素B12局部湿敷，取得了良好的疗效，报告如下。病例1：邹XX，男，37岁，住院号36721，右上臂纤维肉瘤，术后进行放疗。用深部X线外照射，肿瘤量30Gy，局部皮肤色素加深，出现红、肿、热感随即及水泡 In the radiotherapy of malignant tumors, the affected part of the patient is easily damaged by radiation. We used the topical wet compress of vitamin B12 and achieved good results. The report is as follows. Case 1: Zou XX, male, 37 years old, hospital number 36721, right upper arm fibrosarcoma, postoperative radiotherapy. With deep X-rays, the tumor volume is 30 Gy. The local skin pigments are deepened, redness, swelling, heat sensation and blisters appear.