AIM:ToverifythemethylationstatusofCDH1,DAPK,COX2,hMLH1andCDKN2AgenesandtoevaluatetheirassociationwithHelicobacterpylori(H.pylori)-cagA+andEpsteinBarrvirus(EBV)infectionsingastricadenocarcinomas.METHODS:Methylation-specificPCR(MSP)assaywasperformedin89primarygastriccarcinomas(intestinalanddiffusetypes).Microsatelliteinstability(MSI)analysiswasperformedusingtheBAT26primersetandPCRproductswereanalyzedwiththeABIPRISM3100GeneticAnalyzerusingG...