RESUMO
Objective:To explore the significance of lateral lymph node dissection for low rectal cancer.Methods:Retrieval the Cochrane Library,PubMed,EMBASE,CBM,VIP,CNKI,WANFANG DATA,the time is from January 2000 to October 2015.Bring into the comparative studies about lateral lymph node dissection for low rectal cancer.Processing data using the revman 5.2 to reaserch the significance of lateral lymph node dissection for low rectal cancer.Results:9 clinical comparative studies were included in this study.The observation group was the lateral lymph node dissection group and the control group was the traditional operation group.Results showed that the length of incision of the observation group was longer [MD=-42.48,95％CI (32.92,-52.04),P＜0.00001],The amount of bleeding in observation group was more[MD=-18.72,95％Cl(5.60,31.83),P＜0.005],The local recurrence rate in the observation group was Iower[OR=-0.52,95％CI (0.38,0.71),P＜0.0001],The 3 year survival rate and the 5 year survival rate in the observation group were higher than those in the control group,the difference was statistically significant,Their combined OR and 95％CI were [OR=2.65,95％ CI (1.76,3.99),P＜0.00001] and [OR=3.57,95％ CI (2.05,6.22),P＜0.00001].Conclusion:Lateral lymph node dissection increasing operation time、hemorrhage volume and postoperative complication risk,but could increase the survival rate of the patients.