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目的：了解ＣＴ显示不超过正中线的单侧鼻咽癌对侧正常隐窝是否有癌细胞及其意义。方法：选择５０例临床确诊ＣＴ显示不超过正中线的单侧鼻咽癌在肿物、顶后正中、对侧正常隐窝作病理活检。结果：在未见肿物的对侧正常隐窝癌细胞阳性率为１８％，顶后癌细胞阳性率为４４％。ＮＰＣＴ对本组５０例单侧鼻咽癌顶后描述分为正常、轻度增厚、明显增厚、结节肿物四组，而各组活检癌细胞阳性，阴性对照计算Ｐ＝０５５３６无统计学差异。结论：根据肉眼观察一个壁或二个壁有肿物作Ｔ分期的Ｔ１Ｔ２是不恰当的。设计放射野时，ＣＴＶ应把看似没有肿瘤部位考虑进去。对单侧鼻咽癌ＣＴ不能准确判断顶顶后正中有无肿瘤。
OBJECTIVE: To investigate the significance of the presence or absence of cancer cells in the normal contralateral contralateral unilateral nasopharyngeal carcinoma (CT) not exceeding the median line. Methods: 50 cases of clinically confirmed CT showed no more than the median line of unilateral nasopharyngeal carcinoma in the tumor, the middle of the back, the opposite side of the normal crypt biopsy. Results: The positive rate of normal crypt cancer cells on the opposite side of the tumor was 18%, while the positive rate of the top cancer cells was 44%. NPCT on the group of 50 patients with unilateral nasopharyngeal carcinoma described after the top is divided into normal, mild thickening, significant thickening, nodular tumor four groups, and each group of biopsy cancer cells positive and negative control calculated P = 0.55536 Statistical differences. CONCLUSIONS: It is not appropriate to visualize T1T2 with one or two wall-grafts as a T-staging according to the naked eye. When designing the radiation field, the CTV should take into account the seemingly no tumor site. Unilateral CT of nasopharyngeal carcinoma can not accurately determine whether the top of the top tumor.