鼻咽癌放疗后鼻咽局部复发的早期CT诊断

Early CT Diagnosis of Local Recurrence of Nasopharyngeal Carcinoma after Radiotherapy

追踪观察了鼻咽癌放疗后的患者４３例，其中证实复发者１１例；鼻咽显示异常，但经追踪观察而否定复发者３２例。将复发与未复发病例的各种ＣＴ征象进行比较分析，提示在鼻咽癌放疗后局部复发的早期诊断中，“茎突内侧软组织增厚致密”为一重要征象，而“顶后壁增厚、侧壁增厚和咽隐窝变浅或消失”仅起次要作用，说明茎突内侧软组织处肿瘤复发，可能与该部位深在，未能接受足量照射有关。

There were 43 cases of NPC after radiotherapy during following-up, 11 of which had been proved to be recurrent, others which were abnormal in the nasopharynx had been proved to have no recurrence by following-up. Their CT signs were analysed and compared. It was suggested that thickening and compactness of the soft-tissue medial to the styloid process was useful sign. Thickening of the supero-posterior wall and the lateral wall and shallowing or disappearance of the Rosenmuller's fossa were additional useful signs in the CT diagnosis of early NPC after radiotherapy. It was indicated that recurrence of the tumor might be caused by not having enough irradiation in the soft-tissue medical to the styloid process.