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本文总结我院1984年10月至1987年1月鼻咽癌患者CT扫描102例,重点讨论:(1)咽旁间隙解剖;(2)咽旁间隙侵犯率53/102(52％),茎突后间隙侵犯率22/102(21.6％),并综述其它作者咽旁间隙侵犯率;(3)咽旁间隙侵犯对鼻咽癌T分期影响;由于临床对咽旁间隙侵犯无法作出估计,所以过去对T分期偏低,本文对超腔概念作了讨论,一旦咽旁间隙侵犯应列为T_3;(4)咽旁间隙侵犯鼻咽癌放射治疗设野的探讨:本文提出常规耳前野、鼻前野照射咽旁间隙侵犯常被遗漏或剂量不足,建议耳前野后界往后移至乳突前缘,鼻前野X轴(水平轴)改为7—7.5cm(即患侧4—4.5cm,对侧3cm),布野方式:采用二耳前野,一鼻前野,一耳后野的四野布野方式,本方式等剂量曲线分布满意,靶区(鼻咽,咽旁间隙)剂量分布在100％、90％范围内。
This article summarizes 102 cases of CT scan of patients with nasopharyngeal carcinoma in our hospital from October 1984 to January 1987, focusing on: (1) parapharyngeal space anatomy; (2) parapharyngeal space invasion rate 53/102 (52%), stem The rate of axonal invagination was 22/102 (21.6%), and the authors reviewed the invasion rate of parapharyngeal space of other authors; (3) The influence of parapharyngeal space invasion on the T staging of nasopharyngeal carcinoma; because the clinic cannot estimate the parapharyngeal space invasion, In the past, the T stage was low, this article discussed the concept of hypercavity, and if the invasion of parapharyngeal space should be listed as T_3; (4) Discussion of the setting of wild radiotherapy for nasopharyngeal carcinoma with parapharyngeal space invasion. The irradiation of the parapharyngeal space before the irradiation of the wild field is often missed or the dose is insufficient. It is recommended that the wild front boundary of the ear be moved backwards to the front of the mastoid, and the X-axis (horizontal axis) of the prenasal field should be changed to 7-7.5 cm (ie, the affected side is 4-4.5 cm). On the contralateral side (3cm), Buyeye method: using Eryeqianye, a wild front field, and a wild field behind the wild field wild field method, the distribution of this method is satisfactory, the target area (nasopharynx, parapharyngeal space) dose distribution in 100%, 90% range.