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在以前的一份回顾性的研究中分析了荷兰癌研究所自1960—1975年所放疗的233例头颈部癌转移至颈部淋巴结的体积缩小情况。结果表明放疗结束后6周颈部仍可触及肿瘤块则有较大复发可能性。其它研究单位的资料也表明鳞癌病人放疗后对残存肿瘤的估计能可靠地予测其复发机会的多少。至于时间间隔,对于小的声门癌应从放疗结束时而患有较大肿瘤患者则应从放疗后1至2个月时予以评价。在治疗开始后较长时间才予估价可减少由于治疗方式所致的影响,且可探索肿瘤的早期反应。如在放疗结束或结束后6周时估价其体积,则大体上可以估计出分割放疗中其体积的缩小率,其中也存在着一个可予测复发可能性的参数。为探索这
In a previous retrospective study, 233 head and neck cancers transferred from the 1960-1975 radiation therapy at the Dutch Cancer Institute were analyzed for neck volume reduction. The results showed that the neck can still reach the tumor block 6 weeks after the end of radiotherapy has a greater possibility of recurrence. The data from other research units also showed that the estimate of residual tumors after radiotherapy for squamous cell carcinoma patients can reliably predict the chance of recurrence. As for the time interval, patients with larger cancers from the end of radiotherapy for small glottic cancer should be evaluated from 1 to 2 months after radiotherapy. Valuing for a longer period of time after the start of treatment can reduce the effects of treatment and explore the early response of the tumor. If the volume is evaluated at the end of radiotherapy or at 6 weeks after the end of the radiotherapy, the volume reduction rate in fractionated radiotherapy can be estimated in general, and there is also a predictable recurrence probability parameter. To explore this