放射治疗是目前治疗恶性肿瘤的有效手段之一,但随着治疗效果的提高,患者的生存时间不断延长,放射线的远期效应之一——放射致癌的问题也越来越引起人们的关注。现将作者在临床上遇到的2例介绍如下,并对有关问题进行分析。例1 男,1979年患者9岁时患鼻咽部鳞癌,行放射治疗,颈部预防量3600cGy,6年后发生甲状腺 Radiation therapy is currently one of the effective means for the treatment of malignant tumors, but with the improvement of the therapeutic effect, the patient’s survival time is prolonged, and one of the long-term effects of radiation - the problem of radiation carcinogenesis has increasingly attracted people’s attention. The two cases encountered by the author in clinical practice are described below, and related issues are analyzed. Example 1 Male, squamous cell carcinoma of the nasopharynx at the age of 9 in 1979. Radiotherapy was performed. The amount of cervical prophylaxis was 3600 cGy. Six years later, the thyroid gland developed.