Barrett EsophagusEsophagusMetaplasiaEsophageal NeoplasmsPrecancerous ConditionsAdenocarcinomaGenes, MCCCardiaGastroesophageal RefluxEndoscopy, GastrointestinalEsophagoscopyEsophagogastric JunctionMucous MembraneEsophageal DiseasesHernia, HiatalEsophagectomyDisease ProgressionImmunohistochemistryPharmacy AdministrationEsophageal StenosisEndoscopyEsophagitisBiopsyEsophagitis, PepticEsophageal PerforationChromosomes, Human, Pair 5PeristalsisStomach NeoplasmsChromosomes, Human, Pair 17ManometryDeglutition DisordersEsophagoplastyLoss of HeterozygosityTumor Markers, BiologicalEsophageal AchalasiaEsophageal FistulaDilatationDeglutition