Adenocarcinoma, PapillaryCarcinoma, Signet Ring CellCystadenocarcinoma, PapillaryAdenocarcinomaAdenocarcinoma, MucinousStomach NeoplasmsAppendiceal NeoplasmsCarcinomaDuodenal NeoplasmsUmbilicusImmunohistochemistryThyroid NeoplasmsMicrosatellite InstabilityGastrectomyLung NeoplasmsRare DiseasesMucinsProto-Oncogene Proteins B-rafCadherinsPeritoneal NeoplasmsNeoplasm StagingTomography, X-Ray ComputedColorectal NeoplasmsCarcinoma, Squamous CellEndoscopy, GastrointestinalPyloric Antrumras ProteinsLoss of HeterozygosityPrognosisNeoplasm InvasivenessHistocytochemistryCarcinoma, Hepatocellular