StomachStomach NeoplasmsColorectal NeoplasmsAdenomaColonoscopyStomach DiseasesColonic NeoplasmsNeoplasmsColorectal Neoplasms, Hereditary NonpolyposisAdenocarcinomaColorectal SurgeryRectal NeoplasmsPancreatic NeoplasmsColonic PolypsLiver NeoplasmsImmunohistochemistryNeoplasm StagingRectumTumor Markers, BiologicalGastric MucosaColonNeoplasms, Multiple PrimaryDNA, NeoplasmStomach UlcerNeoplasms, Cystic, Mucinous, and SerousSigmoidoscopyAdenomatous PolypsAdenocarcinoma, MucinousCarcinomaPrognosisFluorouracilGastrointestinal NeoplasmsNeoplasm MetastasisNeoplasm ProteinsSkin NeoplasmsIntestinal PolypsGene Expression Regulation, NeoplasticAdenomatous Polyposis ColiNeoplasms, Second PrimaryCarcinoembryonic AntigenOrganoplatinum CompoundsLeucovorinLung NeoplasmsCase-Control StudiesIntestinal MucosaNeoplasm InvasivenessRisk FactorsMass ScreeningMicrosatellite RepeatsEarly Detection of CancerMutationKidney NeoplasmsRetrospective StudiesCamptothecinIntestinal NeoplasmsMutS Homolog 2 ProteinCell Line, TumorHT29 CellsTreatment OutcomeColectomyGenes, APCNeoplasm Recurrence, LocalThyroid NeoplasmsAntigens, NeoplasmSurvival RateGenes, rasDNA MethylationOvarian NeoplasmsTime FactorsHCT116 CellsSurvival AnalysisRectal DiseasesPrecancerous ConditionsMyeloproliferative DisordersProspective StudiesAppendiceal NeoplasmsFollow-Up StudiesNeoplasms, ExperimentalProto-Oncogene Proteins B-rafPolymerase Chain ReactionPyloric AntrumAntineoplastic AgentsAntineoplastic Combined Chemotherapy ProtocolsCystadenomabeta CateninDNA Mutational AnalysisParotid NeoplasmsIncidenceCarcinoma, Signet Ring CellGerm-Line MutationDNA Mismatch RepairNeoplasms, Connective and Soft TissueGenetic Predisposition to DiseaseDisease ProgressionColonic DiseasesCohort StudiesNeoplasms, Plasma CellRNA, MessengerDigestive System Neoplasmsras Proteins