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AIM:To identify whether there could have been changes in survival if lymph node ratio (N ratio) had been used.METHODS:We assessed 334 gastric adenocarcinoma cases retrospectively between 2001 and 2009.Two hundred and sixteen patients out of 334 were included in the study.Patients were grouped according to disection1 (D1) or dissection 2 (D2) dissection.We compared the estimated survival and actual survival determined by Pathologic nodes (pN) class and N ratio,and SPSS 15.0 software was used for statistical analysis.RESULTS:Ninety-six (44.4%) patients underwent D1 dissection and 120 (55.6%) had D2 dissection.When groups were evaluated,23 (24.0%) patients in D1 and 21 (17.5%) in D2 had stage migration (P=0.001).When both D1 and D2 groups were evaluated for number of pathological lymph nodes,despite the fact that there was no difference in N ratio between D1 and D2 groups,a statistically significant difference was found between them with regard to pN1 and pN2 groups (P=0.047,P=0.044 respectively).In D1,pN0 had the longest survival while pN3 had the shortest.In D2,pN0 had the longest survival whereas pN3 had the shortest survival.CONCLUSION:N ratio is an accurate staging system for defining prognosis and treatment plan,thus decreasing methodological errors in gastric cancer staging.
AIM: To identify whether there may have been changes in survival if lymph node ratio (N ratio) had been used. METHODS: We assessed 334 gastric adenocarcinoma cases retrospectively between 2001 and 2009. Two hundred and sixteen patients out of 334 were included in the study. Patients were grouped according to disection 1 (D1) or dissection 2 (D2) dissection. We compared the estimated survival and actual survival determined by Pathologic nodes (pN) class and N ratio, and SPSS 15.0 software was used for statistical analysis .RESULTS (24.0%) patients in D1 and 21 (17.5%) in D2 had stage migration (P = 0.001). Ninety-six (44.4%) patients underwent D1 dissection and 120 ) Both both D1 and D2 groups were evaluated for number of pathological lymph nodes, despite the fact that there was no difference in N ratio between D1 and D2 groups, a significant significant difference was found between them with regard to pN1 and pN2 groups ( P = 0.047, P = 0.044 respe ctively) .In D1, pN0 had the longest survival while pN3 had the shortest.In D2, pN0 had the longest survival pN3 had the shortest survival.CONCLUSION: N ratio is an accurate staging system for defining prognosis and treatment plan, methodological errors in gastric cancer staging.