Esophagogastric JunctionStomach NeoplasmsAdenocarcinomaEsophageal NeoplasmsGastroesophageal RefluxCardiaStomachEsophagusHernia, HiatalBarrett EsophagusEsophagoscopyEsophageal DiseasesMetaplasiaManometryEsophageal pH MonitoringGastrectomyEsophagectomyFundoplicationEsophageal AchalasiaFluorouracilTreatment OutcomeCisplatinNeoplasm StagingAntineoplastic Combined Chemotherapy ProtocolsGap JunctionsIntercellular JunctionsTight JunctionsEsophagitisSurvival RateTaxoidsPrognosisLung Neoplasms