D-二聚体对胃癌患者的转移诊断价值及评估预后的研究

目的 探讨胃癌患者术前D-二聚体对诊断胃癌转移和评估胃癌患者预后的价值.方法 回顾性分析2010年1月-2011年1月安徽医科大学第一附属医院收治的132例胃癌患者完整的临床病理及随访资料.以D-二聚体等于1.465 mg/L为分界值,将患者分为低D-二聚体组和高D-二聚体组,通过x2检验分析D-二聚体水平与患者临床病理特征的关系,并用Kaplan-Meier法和rank检验进行生存分析,采用Cox回归模型分析患者的预后因素.结果 共132例胃癌患者纳入本研究.卡方检验结果提示D-二聚体与患者性别、肿瘤大小、淋巴结转移、TNM分期、分化程度无明显相关(P均＞0.05),而与年龄(x2 =4.311,P＜0.05)、侵犯深度(x2=4.996,P＜0.05)和胃癌是否远处脏器转移(x2=8.300,P＜0.05)相关;胃癌远处脏器转移患者血浆中D-二聚体浓度为(1.39±0.73) mg/L,胃癌非远处脏器转移患者血浆中D-二聚体浓度为(0.97 ±0.83) mg/L,差异具有统计学意义(P =0.023),手术后5年内死亡的胃癌患者血浆中D-二聚体浓度为(1.22±0.92) mg/L,在手术后5年存活的胃癌患者血浆中D-二聚体浓度为(0.78±0.58) mg/L,差异具有统计学意义(P=0.001);Kaplan-Meier生存分析提示高D-二聚体组的胃癌患者总生存率远低于低D-二聚体组(P＜0.01);单因素分析结果表明性别、D-二聚体、肿瘤大小、肿瘤浸润深度、淋巴结转移和TNM分期与胃癌患者总生存率有关(均P ＜0.05),多因素Cox回归模型分析显示D-二聚体为影响胃癌患者预后的独立因素(P＜0.01).结论 D-二聚体可能对判断胃癌患者是否转移提供一定的诊断价值,同时D-二聚体是影响胃癌患者预后的独立预测因素.

Research of preoperative D-dimer value in patients with gastric cancer in judging gastric cancer metastasis and assessing prognosis

Objective To explore the value of preoperative D-dimer in patients with gastric cancer in judging gastric cancer metastasis and assessing prognosis.Methods Clinicopathological data of 132 patients with gastric cancer in the First Affiliated Hospital of Anhui Medical University between Jan.2010 and Jan.2011 was analyzed retrospectively in this study.All patients were divided into two groups according to the cutoff value (1.465 mg/L)of D-dimer and the relationships between D-dimer and clinicopathological data were determined by chi-square test.Moreover,the association of preoperative D-dimer and the prognosis was analyzed by Kaplan-Meier analysis and Log-rank test.Univariate and multivaritate Cox model were used to analyze the factors which might affect the survival of the patients and significant independent factors.Results A total of 132 patients were enrolled in this study in accordance with the inclusion criteria.D-dimer was positively correlated with the depth of invasion (x2 =4.996,P ＜ 0.05),age (x2 =4.311,P ＜ 0.05) and distant metastasis of gastric cancer (x2 =16.641,P ＜0.01),but not with thc gcndcr,lymph node metastasis,tumor size,the degree of differentiation and TNM stage (P ＞ 0.05).The mean D-dimer level was (1.39 ± 0.7) mg/L in distant metastasis patients and (0.97 ±0.83) mg/L in non distant metastasis patients (P =0.023),the mean plasma D-dimer level in patients alive at the 5 years after the surgery was (0.78 ± 0.58) mg/L,which was significantly lower than the amounts determined for the deceased patients (0.75 ± 0.58) mg/L (P ＜ 0.01).The Kaplan-Meier curves showed that the patients with gastric cancer had a longer time in the low D-dimer group than in the high D-dimer group,showing a significant difference between the two groups (P ＜ 0.01).Univariate analysis showed that the overall survival rate was significantly correlated with the gender,D-dimer,tumor size,the depth of invasion,lymph node metastasis and TNM stage (P all ＜ 0.05).The D-dimer was proved to be independent risk factor for the prognosis of gastric cancer by multivariate analysis(P ＜ 0.05).Conclusion According to the analysis,D-dimer may be valuable biomarker for metastasis patients,besides,D-dimer was an independent prognostic factor for patients with gastric cancer.