鼻咽癌由于其生长部位及生物学特性,放射治疗是目前被公认的首选和最有效的治疗手段,但在足量外照射后仍有13%～18%的病例有局部病灶残留和30%～39%病例原发灶复发.其中65%～85%的复发出现在放疗后的前3年内.有为数不少复发病人,早期可全无症状,仅在例行复查时才发现鼻咽肿 Nasopharyngeal carcinoma due to its growth position and biological characteristics, radiation therapy is currently recognized as the preferred and the most effective treatment, but after adequate external exposure, there are still 13% to 18% of cases with local lesions and 30% ~ 39% of cases of primary tumor recurrence, of which 65% to 85% of the recurrence occurred in the first 3 years after radiotherapy. There are a large number of relapse patients, early all-cause symptoms, nasopharyngeal only found in routine review