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对２６例已确诊鼻咽癌放疗后复发病例进行鼻咽部ＣＴ横断或冠状扫描。结果发现：①鼻咽表浅结构受累，主要表现为鼻咽表浅软组织增厚，形态不规则，可形成肿块突入鼻咽腔，致使鼻咽腔变形、变窄。②鼻咽深部结构受累，主要表现为脂肪间隙模糊、消失或密度增高，肿块影占据。③颅底骨质硬化或／和骨质破坏。鼻咽癌放疗后复发应注意与放射治疗引起的局部纤维化相鉴别。颅底骨质改变应仔细对此放疗前颅底ＣＴ片后加以确认。
Thirty-six cases of nasopharyngeal carcinoma who had been diagnosed with recurrent nasopharyngeal CT scan or CT scan were retrospectively analyzed. The results showed that: (1) Nasopharyngeal superficial structures were involved, which mainly manifested as thickening of nasopharyngeal superficial soft tissue with irregular shape. The tumors formed into the nasopharyngeal cavity, causing the nasopharyngeal cavity to deform and narrow. Involved in the deep structure of the nasopharynx, the main performance of the fat gap fuzzy, disappear or increased density, mass shadow occupy. ③ skull base bone sclerosis or / and bone destruction. Nasopharyngeal carcinoma recurrence after radiotherapy and radiation therapy should pay attention to the differential diagnosis of local fibrosis. Skull bone changes should be carefully radiotherapy before the skull base CT film to be confirmed.