915例单纯根治性放疗鼻咽癌分期系统比较及建议(一)——对'92福州分期的校验

Staging 915 Cases of Nasopharyngeal Carcinoma after Simple Radical Radiotherapy——Checkout of Fuzhou Staging System (1992)

背景与目的:随着治疗技术的进展,肿瘤不同分期系统并存并经过了相应调整。本研究旨在对鼻咽癌N92福州分期进行进一步验证和提出适当的建议。方法:自1997年1月至1998年12月,本中心共收治915例单纯根治性放疗鼻咽癌住院患者,经过反复随诊,其1、3、5年随访率分别达98.7%、95.2%和91.7%,采用寿命表法、Cox回归分析,Kaplan-Meier及log-rank法等对其生存资料进行分析。结果:915例患者的1、3、5年合计生存率分别为87.7%、72.7%和64.4%;1、3、5年无瘤生存率分别为86.9%、69.7%和58.3%。Cox模型分析表明年龄、%92福州大体分期或T和N分期与生存状况显著相关,统计学差异显著。选择年龄≤60岁患者803例再行Cox模型分析,生存状况仅与福州大体分期或T和N显著相关,而与年龄的相关无统计学显著性。对803例鼻咽癌患者的寿命表法分析表明,福州分期基本可反映预后,但Ⅰ和Ⅱ期5年生存率比较差异不显著。Kaplan-Meier法分析表明在考虑N分期因素影响下,T1期与T2期差别不显著。将无咽旁间隙受侵的T2期下调为T1期;原T3期的颈动脉鞘区受侵者下调为T2期;原T3期中有前组颅神经受侵者调整为T4期;原T4期之副鼻窦受侵者下调为T3期。将双颈淋巴结受侵的N1期上调为N2期。重新进行分析,调整后大体分期、T分期和N分期各自组间比较差异具统计学显著性,分组更为合理。结论:在充分考虑年龄对预后的影响及T分期和N分期之间相互影响的前提下,本组病例对福州分期(1992)的验证提示可对其进行上述调整。

BACKGROUND ＆ OBJECTIVE. Along with the development of treatments, different tumor staging systems are coexisted and have been modified. This study was to validate the rationality of the Fuzhou staging system （1992） of nasopharyngeal carcinoma （NPC）, and to provide some suggestions. METHODS. A total of 915 NPC patients received radical radiotherapy alone in Cancer Center of Sun Yat-sen University from Jan. 1997 to Dec. 1998. The 1-, 3-, and 5-year follow-up rates were 98.7%, 95.2%, and 91.7%, respectively. The survival data were analyzed with Life table, Cox regression, Kaplan-Meier, and log-rank methods. RESULTS. The 1-, 3- , and 5-year overall survival rates of the 915 patients were 87.69%, 72.73%, and 64.44%; the 1-, 3-, and 5-year disease-freely survival rates were 86.87%, 69.72%, and 58.33%, respectively. Cox regression analysis showed that the 5-year survival statuses of the 915 patients were significantly correlated with their age and the tumor stage classified by the Fuzhou staging system （1992）; the 5-year survival statuses of the 803 patients no more than 60 years old were only significantly correlated with tumor stage, and had no correlation with their age. Life table analysis validated that the tumor stage classified by Fuzhou staging system （1992） can roughly predict the prognosis, but the difference between the 5-year survival rates of stage Ⅰ and Ⅱ patients was not significant. Kaplan-Meier analysis showed no significant difference between survival statuses of stage T1 and T2 patients when adjusted by N classification. Therefore, we adjusted stage T2 without parapharyngeal space invasion to stage T1, stage T3 with carotid vagina invasion to stage T2, stage T4 with paranasal sinus involvement to stage T3, stage T3 with cranial nerve injury to stage T4, and stage N1 with bilateral lymph nodes involvement to stage N2. After the modifications, the differences among stage Ⅰ to Ⅳa, stage T1 to T4 （adjusted by N stage）, or stage N0 to N3 （adjusted by T stage） were significant. CONCLUSION. Taking the impact of age on the prognosis and the interaction between T stage and N stage into consideration, the above modifications of should be included when renewing the Fuzhou staging system （1992）.