Carcinoma, Signet Ring CellAdenocarcinoma, MucinousStomach NeoplasmsCarcinomaAppendiceal NeoplasmsUmbilicusCarcinoma, Squamous CellCarcinoma, HepatocellularMicrosatellite InstabilityImmunohistochemistryGastrectomyAdenocarcinomaRare DiseasesMucinsProto-Oncogene Proteins B-rafCadherinsNeoplasm StagingPeritoneal NeoplasmsColorectal NeoplasmsPyloric AntrumEndoscopy, GastrointestinalCarcinoma in SituNeoplasm InvasivenessLoss of HeterozygosityPrognosisras ProteinsHistocytochemistryCarcinoma, PapillaryMicrosatellite RepeatsAlcian BlueLiver NeoplasmsSurvival AnalysisCarcinoma, Ductal, BreastCarcinoma, Basal Cell