There are several sp ecial patterns of local NPC tumor recurrence after radiation therapy in the pres ence of normal nasopharyngeal mucosa. MR imaging is the method of choice to depi ct the location and extent of NPC tumor recurrence.

• 鼻咽癌放疗后复发存在多种特殊类型 ,MR是检查鼻咽癌放疗后复发的较好方法