鼻咽癌根治性外照射后 ,1 0 %～ 1 8%有局部病灶残留 ,复发率达 2 0 %～ 30 % [1] 。对鼻咽癌足量外照射后腔内残留灶进行高剂量率后装腔内放疗具有良好疗效。我科 1 997年 2月～ 1 999年 4月对治疗的 1 5 0例鼻咽癌中 2 1例鼻咽腔内有残留病灶的患者进行了后装治疗。1　材料与 Nasopharyngeal carcinoma after radical external irradiation, 10% ~ 18% of local lesions, the recurrence rate of 20% to 30% [1]. After sufficient external irradiation of nasopharyngeal carcinoma, the residual cavity in high dose rate posterior chamber radiotherapy has good curative effect. Our department from February 1997 to April 1999 on the treatment of 150 cases of nasopharyngeal carcinoma in 21 cases of patients with residual lesions in the nasopharynx for post-treatment. 1 material and