简介：Objective:ResponseEvaluationCriteriainSolidTumors(RECIST)guidelineversion1.0(RECIST1.0)wasproposedasanewguidelineforevaluatingtumorresponseandhasbeenwidelyacceptedasastandardizedmeasure.WithanumberofissuesbeingraisedonRECIST1.0,however,arevisedRECISTguidelineversion1.1(RECIST1.1)wasproposedbytheRECISTWorkingGroupin2009.ThisstudywasconductedtocompareCTtumorresponsebasedonRECIST1.1vs.RECIST1.0inpatientswithadvancedgastriccancer(AGC).Methods:Wereviewed61AGCpatientswithmeasurablediseasesbyRECIST1.0whowereenrolledinotherclinicaltrialsbetween2008and2010.Thesepatientswereretrospectivelyre-analyzedtodeterminetheconcordancebetweenthetworesponsecriteriausingtheκstatistic.Results:ThenumberandsumoftumordiametersofthetargetlesionsbyRECIST1.1weresignificantlylowerthanthosebyRECIST1.0(P<0.0001).However,therewasexcellentagreementintumorresponsebetweenRECIST1.1andRECIST1.0(κ=0.844).Theoverallresponserates(ORRs)accordingtoRECIST1.0andRECIST1.1were32.7%(20/61)and34.5%(20/58),respectively.Onepatientwithpartialresponse(PR)basedonRECIST1.0wasreclassifiedasstabledisease(SD)byRECIST1.1.OftwopatientswithSDbyRECIST1.0,onewasdowngradedtoprogressivediseaseandtheotherwasupgradedtoPRbyRECIST1.1.Conclusions:RECIST1.1providedalmostperfectagreementwithRECIST1.0intheCTassessmentoftumorresponseofAGC.