EsophagusBarrett EsophagusEsophageal NeoplasmsEsophagoscopyEsophageal DiseasesEsophageal StenosisEsophagectomyEsophagogastric JunctionMetaplasiaGastroesophageal RefluxCardiaAdenocarcinomaEsophagoplastyEsophagitisMucous MembranePrecancerous ConditionsEsophagitis, PepticEsophageal PerforationPeristalsisManometryEsophageal FistulaCarcinoma, Squamous CellDimethylnitrosamineEsophageal Sphincter, LowerDeglutitionEndoscopy, GastrointestinalHypopharynxHernia, HiatalEsophageal AchalasiaDeglutition DisordersEndoscopy, Digestive SystemEsophagoscopesCausticsStomachEndoscopyFundoplicationEsophageal Sphincter, UpperEsophageal AtresiaHydrochloric AcidStomach NeoplasmsDilatationDiverticulum, EsophagealForeign BodiesBurns, ChemicalBiopsyDuodenogastric RefluxEosinophilic EsophagitisUpper Gastrointestinal TractTracheoesophageal FistulaEsophageal Motility DisordersCineradiographyEsophageal pH MonitoringImmunohistochemistryBile RefluxDigestive System NeoplasmsGastrointestinal NeoplasmsNumismaticsFistulaDigestive SystemAnastomosis, SurgicalNitrosaminesMediastinumRetrospective StudiesLaryngopharyngeal RefluxLarynxDisease ProgressionRisk FactorsGastroscopyUlcerGastrectomyCarcinoma, BasosquamousCase-Control StudiesDuodenumTreatment OutcomeGastric MucosaEsophageal Spasm, DiffuseDiagnostic Techniques, Digestive SystemCatheter AblationEpitheliumHeartburnEsophagostomyNodose GanglionPressureGoblet CellsPhotochemotherapyCarcinogensNeoplasm StagingEsophageal CystTumor Markers, BiologicalMucin-2Pharyngeal Diseases