高危因素联合分层法在预测N2-3M0期鼻咽癌预后的临床价值分析

目的 分析高危因素联合分层法在预测N2-3M0期鼻咽癌预后的临床价值。方法 2013-2015年间226例N2-3M0期首程鼻咽癌病例被纳入研究,分析肿瘤体积、颈部转移淋巴结特征(坏死、融合)和T、N分期等与生存的关系,分析影响生存的高危因素,探讨高危因素联合分层法在预测预后的价值。结果 N3期、Vn≥47.15cm³和淋巴结融合是N2-3M0期鼻咽癌患者远处转移的高危因素,根据高危因素分为低危、中危、高危、极高危组。生存分析显示低危、中危、高危、极高危组3年总生存率分别为84.2%、76.7%、58.7%、36.4%(P<0.001),无远处转移生存率分别为87.3%、85.2%、54.5%、12.1%(P<0.001),无进展生存率分别为76.8%、74.3%、49.2%、12.1%(P<0.001),无局部区域复发生存率分别为89.2%、88.5%、91.5%、88.3%(P=0.914)。比较N分期、Vn分组、淋巴结融合分组和高危因素联合分层法的无远处转移生存曲线发现:高危因素联合分层法将组间曲线分离的更开,明显优于其他三组(P<0.05)。结论 高危因素联合分层法在预测N2-3M0期鼻咽癌患者预后的临床价值更高。

Analysis of clinical value of high-risk factors combined with stratification analysis in predicting clinical prognosis of N2-3M0 nasopharyngeal carcinoma patients

Objective To evaluate the clinical value of high-risk factors in combination with stratification method in predicting the clinical prognosis of patients diagnosed with N2-3M0 nasopharyngeal carcinoma (NPC). Methods A total of 226 N2-3M0 NPC patients who underwent IMRT from November 2013 to May 2015 were enrolled in this study. The relationship between tumor volume, cervical metastatic lymph node characteristics (necrosis and fusion) and T and N staging was analyzed. The high-risk factors that affected the survival were identified. The value of high-risk factors combined with stratification method in predicting the clinical prognosis was assessed. Results N3 staging, Vn≥47.15cm³ and lymph node fusion (LNF) were the high-risk factors for distant metastasis in patients with stage N2-3M0 NPC. All patients were classified into the low-risk, medium-risk, high-risk and extremely high-risk groups according to high-risk factors. For patients in the low-risk, medium-risk, high-risk and extremely high-risk groups, the 3-year overall survival rates were 84.2%,76.7%,58.7% and 36.4%(all P<0.001), 87.3%,85.2%,54.5% and 12.1% for the distant metastasis-free survival (DMFS) rates (all P<0.001), 76.8%,74.3%,49.2% and 12.1%for the progression-free survival (PFS) rates (all P<0.001), and 89.2%,88.5%,91.5% and 88.3% for the loco-regional recurrence-free survival (LRRFS) rates (P=0.914), respectively. The risk stratification method showed the best curve separation for DMFS compared to the Vn, N staging and LNF classification groups (all P<0.05). Conclusion High-risk factors in combination with stratification method has the highest clinical value in predicting the clinical prognosis of N2-3M0 NPC patients.