Colonic PolypsColorectal NeoplasmsPolypsColonoscopyAdenomatous PolypsColonic NeoplasmsAdenomaIntestinal PolypsAdenomatous Polyposis ColiNasal PolypsColonRectal NeoplasmsEarly Detection of CancerColorectal Neoplasms, Hereditary NonpolyposisSigmoidoscopyAdenocarcinomaFluorouracilTumor Markers, BiologicalNeoplasm StagingNeoplasm MetastasisOccult BloodOrganoplatinum CompoundsPrognosisGene Expression Regulation, NeoplasticLeucovorinHT29 CellsCamptothecinRectumColonography, Computed TomographicCell Line, TumorCarcinomaLiver NeoplasmsMass ScreeningRisk FactorsCarcinoembryonic AntigenMicrosatellite InstabilityMutationNeoplasm ProteinsGenes, APCMicrosatellite RepeatsIntestinal MucosaGenetic Predisposition to DiseaseSurvival AnalysisHCT116 CellsImmunohistochemistryAntineoplastic Combined Chemotherapy ProtocolsColon, DescendingDNA MethylationSurvival RateProspective StudiesColorectal SurgeryNeoplasm InvasivenessAntineoplastic AgentsDNA, NeoplasmCase-Control StudiesColectomyMutS Homolog 2 ProteinRetrospective StudiesProto-Oncogene Proteins B-rafGerm-Line MutationDisease ProgressionMice, NudeFollow-Up StudiesDNA Mismatch RepairNeoplasmsTreatment OutcomeReverse Transcriptase Polymerase Chain ReactionRiskras Proteinsbeta CateninStomach NeoplasmsAntimetabolites, AntineoplasticGenes, rasLung NeoplasmsBreast NeoplasmsColon, SigmoidDisease-Free SurvivalRNA, MessengerIncidenceGenotypeNeoplasm Recurrence, LocalPolymerase Chain ReactionUnited StatesPrecancerous ConditionsSensitivity and SpecificityAntibodies, Monoclonal, HumanizedPolymorphism, GeneticRectal DiseasesOdds RatioRisk AssessmentDNA Mutational AnalysisRegistriesColon, AscendingAntibodies, MonoclonalAdaptor Proteins, Signal TransducingProto-Oncogene ProteinsCohort StudiesProstatic NeoplasmsColonic DiseasesSigmoid Neoplasms