Barrett EsophagusEsophagusEsophageal NeoplasmsMetaplasiaPrecancerous ConditionsAdenocarcinomaGenes, MCCCardiaGastroesophageal RefluxEndoscopy, GastrointestinalEsophagoscopyDisease ProgressionImmunohistochemistryEsophagogastric JunctionEsophagectomyMucous MembraneHernia, HiatalStomach NeoplasmsEsophageal DiseasesPharmacy AdministrationEarly Detection of CancerEsophageal StenosisEndoscopyBiopsyTumor Markers, BiologicalGene Expression Regulation, NeoplasticCarcinoma, Squamous CellPrognosis