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（目的）分析鼻咽癌腔外侵犯的情况及其与颈部淋巴结转移的关系。（方法）总结38例经活检病理证实为鼻咽癌患者的CT图像。平扫11例，平扫加增强27例，横断加冠状位扫描4例。层厚、层距各5mm。（结果）38例均有鼻咽腔变形、局部隆起、粘膜下增厚肿块、咽隐窝挤压、消失等变化。参照黎福祥的咽旁间隙划区方法，94．7％有不同程度咽旁间隙侵犯。咽旁间隙后区受侵者，颈淋巴结转移63．3％（19／30）。口咽受侵者，颈淋巴结转移率为100％（10／10）。受侵部位大于3个者，颈淋巴结转移率为86．6％（13／15）。（结论）CT扫描对鼻咽癌诊断及明确侵及部位具有重要价值。合理扫描可增加肿瘤侵及范围的检出率。咽旁后间隙受侵、口咽受侵及部位多者其颈淋巴结转移率高，这对放疗设野具有重要参考价值。
Objective To analyze the relationship between extracavitary invasion of nasopharyngeal carcinoma and cervical lymph node metastasis. Methods Thirty-eight CT images of nasopharyngeal carcinoma confirmed by biopsy were summarized. Eleven cases were plain scan, 27 cases were plain scan and enhanced, and 4 cases were transverse and coronal scan. Layer thickness, layer spacing 5mm. Results All the patients had nasopharyngeal cavity deformation, local uplift, submucosal thickened mass, extrusion of pharyngeal crypts and disappearance. Reference Li Fuxiang parapharyngeal space division method, 94.7% of the degree of parapharyngeal space violations. Parapharyngeal space after the aggressor, neck lymph node metastasis 63.3% (19/30). Oesophageal invaders, neck lymph node metastasis rate was 100% (10/10). Invasive sites more than 3 people, cervical lymph node metastasis rate was 86.6% (13/15). (Conclusion) CT scan is of great value in the diagnosis and definite invasion of nasopharyngeal carcinoma. Reasonable scan can increase the detection rate of tumor invasion. Parapharyngeal clearance after the invasion, oropharyngeal invasion and more parts of its high rate of cervical lymph node metastasis, which sets the field of radiotherapy has an important reference value.