The relationship between metastatic lymph node ratio and prognosis in stage Ⅲ gastric cancer after D2 nodal dissection
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摘要: [目的]研究淋巴结转移率 (MLR) 与Ⅲ期胃癌患者D2根治术后生存率和化疗获益的关系。[方法]选取2010年1月~2013年12月我院收治的87例Ⅲ期胃癌患者作为研究对象, 进行回顾性研究。患者行胃癌R0切除伴D2淋巴结清扫术, 其中83例接受胃全切除, 4例接受胃大部切除术;57例患者接受含5-Fu的辅助化疗。通过Kaplan-Meier法分析患者生存率。[结果]淋巴结总数的中位值是35 (10~104) , 转移淋巴结的中位数是8 (0~71) 。中位生存期31.7个月, 3年生存率36.4%。患者按MLR分为4组:MLR0, 0;MLR1, <0.1;MLR2, 0.1~0.25;MLR3, >0.25。中位随访31个月后, MLR0到MLR3组患者中位生存时间分别是37.1个月、35.9个月、31.5个月、20.8个月 (P=0.013) 。选取中位值0.24作为MLR高低的临界值, MLR<0.24的患者中, 采用辅助化疗和不采用辅助化疗的中位生存期分别是39.3个月和36.5个月。MLR>0.24的患者中, 采用辅助化疗和不采用辅助化疗的中位生存期分别是22.9个月和12.2个月 (P=0.002) 。多变量分析表明, MLR是一个独立的预后因素。[结论]Ⅲ期胃癌患者行R0切除伴D2淋巴结清扫术后, MLR是一个有效的预后指标;高MLR患者可能从辅助化疗中获益最多。Abstract: [Objective] To investigate the prognostic value of metastatic lymph node ratio (MLR) and adjuvant chemotherapy in Ⅲ gastric cancer after D2 nodal dissection. [Methods]A total of 87 gastric cancer patients from January 2010 to December 2013 were retrospectivelyenrolled in this study.Of these patients, 83 underwent total gastrectomy, the remaining 4 underwent subtotal gastrectomy and 57 patients received adjuvant chemotherapy with fluoropyrimidines.Survival analysis was determined by the Kaplan-Meier method. [Results]Median total retrieved lymph node number was 35 (range: 10-104) with median metastatic lymph node amount of eight (range: 0-71) . Median survival time was 31.7 months with a 3-year survival rate of 36.4%. Patients were divided into four groups according to MLR: MLR0, 0; MLR1, <0.1; MLR2, 0.1-0.25; MLR3, >0.25. After median follow-up of 31 months, median OS rates of MLR0 to MLR3 were 37.1 m, 35.9 m, 31.5 m and 20.8 m, respectively (P=0.013) . Median survival time were 9.3 m and 36.5 m in low subgroups (MLR<0.24) with or without adjuvant chemotherapy; 22.9 m and 12.2 m were found in high subgroups (MLR>0.24) with and without chemotherapy, respectively (P=0.002) . Finally, MLR constituted an independent prognostic factor in multivariable analysis. [Conclusion]After R0 resection with D2 lymphadenectomy for stage Ⅲ gastric cancer, MLR constitutes an effective prognostic indicator. Patients with high MLR may benefit from adjuvant chemotherapy.
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Key words:
- MLR /
- gastric cancer /
- D2 nodal dissection /
- prognosis
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