清扫淋巴结数和N1淋巴结阳性数与Ⅱ期非小细胞肺癌预后的关系

目的 探讨淋巴结清扫相关指标与完全切除的Ⅱ期(T1～2N1)非小细胞肺癌(NSCIC)患者预后的关系.方法 回顾性分析121例完全切除的Ⅱ期NSCLC患者,分析清扫的淋巴结数、N1阳性数、N2淋巴结的总数、N1淋巴结的转移度等淋巴结的临床指标对总生存率(OS)和无病生存率(DFS)的影响.结果 单因素分析显示,清扫的淋巴结数、N1淋巴结阳性数、N1淋巴结转移度和清扫N2淋巴结的总数与OS相关;多因素分析显示,清扫的淋巴结数、N1淋巴结阳性数为影响OS的独立因素.单因素分析和多因素分析均显示,肿瘤直径、清扫淋巴结总数、N1淋巴结阳性数为DFS的独立因素.结论 对于可完全切除的Ⅱ期NSCLC患者,术中至少应清扫10枚以上淋巴结.清扫淋巴结的总数≥10枚是预后的良好因素,而N1阳性淋巴结数≥3枚是预后的不良因素.

Impact of the number of resected and involved lymph nodes on the outcome in patients with stage II non-small cell lung cancer

Objective The aim of this study was to evaluate if factors associated with dissected lymph nodes affect the outcome of completely resected stage II (T1-2N1) non-small cell lung cancer (NSCLC). Methods Clinical data of 121 patients with complete resection of stage II NSCLC in Sun Yat-sen University Cancer center from January 1998 to December 2004 were reviewed retrospectively and the effect of factors of dissected lymph nodes on overall survival (OS) and disease-free survival ( DFS) of NSCLC was analyzed.Results The univariate analysis demonstrated that the total number of removed lymph nodes, the number of involved N1 lymph nodes, the ratio of involved N1 lymph nodes and the total number of removed N2 lymph nodes were significant prognostic factors for OS. In the multivariate analysis, the total number of removed lymph nodes and the number of involved N1 lymph nodes were independent prognostic factors for OS. In both of univariate and multivariate analyses, tumor size, the total number of removed lymph nodes and the number of involved N1 lymph nodes were independent prognostic factors for DFS.Conclusion For patients with completely resectable stage II NSCLC, 10 or more lymph nodes should be removed at the surgical resection. Total number of removed lymph nodes ≥ 10 is a favorable prognostic factor and involved N1 ≥ 3 is an adverse one.