Colorectal NeoplasmsColonic NeoplasmsAdenomaColonoscopyColon, DescendingColorectal SurgeryColorectal Neoplasms, Hereditary NonpolyposisRectal NeoplasmsAdenocarcinomaRectumColonic PolypsColon, SigmoidHT29 CellsSigmoidoscopyAdenomatous PolypsIntestinal MucosaColon, AscendingFluorouracilColonIntestinal PolypsColonic DiseasesTumor Markers, BiologicalLiver NeoplasmsNeoplasm StagingColectomyOrganoplatinum CompoundsAdenomatous Polyposis ColiLeucovorinCarcinomaCarcinoembryonic AntigenGene Expression Regulation, NeoplasticCell Line, TumorPrognosisImmunohistochemistryCamptothecinGenes, APCColon, TransverseMass ScreeningCase-Control StudiesNeoplasm MetastasisAzoxymethaneMicrosatellite RepeatsEarly Detection of CancerMutS Homolog 2 ProteinRisk FactorsRectal Diseasesbeta CateninDNA, NeoplasmMutationDNA MethylationHCT116 CellsNeoplasm ProteinsProto-Oncogene Proteins B-rafAntineoplastic AgentsSigmoid NeoplasmsDNA Mismatch RepairGenes, rasTumor Cells, CulturedDiverticulum, ColonAdenomatous Polyposis Coli ProteinSurvival AnalysisProspective StudiesTreatment OutcomeSurvival RateCaco-2 CellsAntineoplastic Combined Chemotherapy ProtocolsColonography, Computed Tomographicras ProteinsEnemaAntimetabolites, AntineoplasticRNA, MessengerNeoplasm InvasivenessPrecancerous ConditionsGenetic Predisposition to DiseaseMice, NudeApoptosis1,2-DimethylhydrazineReverse Transcriptase Polymerase Chain ReactionGerm-Line MutationRetrospective StudiesCell ProliferationTime FactorsPolymerase Chain ReactionColitisAdaptor Proteins, Signal TransducingIncidenceBase Pair MismatchAntibodies, MonoclonalDisease ProgressionAdenocarcinoma, MucinousDNA Mutational AnalysisProto-Oncogene ProteinsFollow-Up StudiesBarium SulfateLymphatic MetastasisCohort StudiesCyclooxygenase 2DietColitis, UlcerativeNeoplasms