EsophagusBarrett EsophagusStomachStomach NeoplasmsEsophageal NeoplasmsEsophagoscopyEsophageal DiseasesStomach DiseasesAdenocarcinomaMetaplasiaEsophageal StenosisEsophagogastric JunctionEsophagectomyNeoplasmsCardiaPancreatic NeoplasmsGastroesophageal RefluxGastric MucosaPrecancerous ConditionsEsophagoplastyStomach UlcerMucous MembraneEsophagitisNeoplasms, Cystic, Mucinous, and SerousNeoplasms, Multiple PrimaryGastrointestinal NeoplasmsEsophagitis, PepticPeristalsisManometryImmunohistochemistryEsophageal PerforationCarcinoma, Squamous CellEndoscopy, GastrointestinalSkin NeoplasmsNeoplasms, Second PrimaryEsophageal FistulaEndoscopy, Digestive SystemHernia, HiatalDimethylnitrosamineGastrectomyDNA, NeoplasmEsophageal Sphincter, LowerKidney NeoplasmsDigestive SystemDeglutitionBiopsyLung NeoplasmsGastroscopyNeoplasm StagingDeglutition DisordersEndoscopyGastric FundusThyroid NeoplasmsDigestive System NeoplasmsAdenocarcinoma, MucinousEsophageal AchalasiaPyloric AntrumHydrochloric AcidDuodenumLiver NeoplasmsHypopharynxIntestinal NeoplasmsTumor Markers, BiologicalCausticsRetrospective StudiesEsophagoscopesMyeloproliferative DisordersNeoplasms, ExperimentalCystadenomaEsophageal AtresiaParotid NeoplasmsTomography, X-Ray ComputedForeign BodiesFundoplicationNeoplasms, Connective and Soft TissueNeoplasms, Plasma CellGastrointestinal MotilityAppendiceal NeoplasmsUpper Gastrointestinal TractGastric AcidFatal OutcomeOvarian NeoplasmsNeoplasms, Radiation-InducedNeoplasm ProteinsEndocrine Gland NeoplasmsNeoplasm InvasivenessDilatationStomach RuptureCystadenoma, MucinousGastric JuiceEsophageal Sphincter, UpperDuodenogastric RefluxColonic NeoplasmsCarcinogensCarcinomaCarcinoma, Pancreatic DuctalNose NeoplasmsAntigens, NeoplasmBurns, ChemicalTreatment Outcome