Carcinoma, Signet Ring CellAdenocarcinoma, MucinousCarcinoma, Squamous CellStomach NeoplasmsCarcinomaAppendiceal NeoplasmsUmbilicusCarcinoma, Renal CellImmunohistochemistryCarcinoma, Basal CellCarcinoma, HepatocellularMicrosatellite InstabilityAdenocarcinomaGastrectomyRare DiseasesNeoplasm StagingMucinsCadherinsProto-Oncogene Proteins B-rafPeritoneal NeoplasmsPrognosisNeoplasm InvasivenessCarcinoma, Transitional CellColorectal NeoplasmsCarcinoma in SituLoss of HeterozygosityPyloric AntrumEndoscopy, GastrointestinalKidney Neoplasmsras ProteinsCarcinoma, PapillaryHistocytochemistryCarcinoma, Merkel CellHead and Neck NeoplasmsCarcinoma, Small CellMouth NeoplasmsMicrosatellite RepeatsSurvival AnalysisAlcian BlueLiver NeoplasmsSkin NeoplasmsTumor Markers, BiologicalMutationEsophageal NeoplasmsCarcinoma, Ductal, Breast