在放疗中常把肿瘤的消退程度作为预后的指标。有人认为在放疗中肿瘤的消退程度可指示出放疗的成功或失败,也有人按喉癌在放疗达到4,000拉得时的消退情况,来决定是选择手术还是继续放疗。但电有人认为头颈部肿瘤在放疗结束时仍然存在并不预示局部失败 In radiotherapy, the degree of tumor regression is often used as an indicator of prognosis. Some people think that the degree of tumor regression in radiotherapy can indicate the success or failure of radiotherapy. Some people decide whether to choose surgery or continue radiotherapy according to the regression of laryngeal cancer when radiotherapy reaches 4,000 pull. However, some people believe that head and neck tumors still exist at the end of radiotherapy and do not indicate local failure