Colorectal Neoplasms, Hereditary NonpolyposisColorectal NeoplasmsAdenomatous Polyposis ColiGenetic TestingNeoplastic Syndromes, HereditaryGenetic CounselingMutS Homolog 2 ProteinDNA Mismatch RepairMicrosatellite RepeatsGenetic Predisposition to DiseaseAdenomaColonoscopyColorectal SurgeryColonic PolypsRectal NeoplasmsColonic NeoplasmsAdenocarcinomaRectumSigmoidoscopyAdenomatous PolypsColonFluorouracilLiver NeoplasmsOrganoplatinum CompoundsLeucovorinTumor Markers, BiologicalNeoplasm StagingIntestinal PolypsPrognosisCarcinoembryonic AntigenMass ScreeningCamptothecinCarcinomaEarly Detection of CancerHT29 CellsCase-Control StudiesGene Expression Regulation, NeoplasticImmunohistochemistryNeoplasm MetastasisIntestinal MucosaColectomyHCT116 CellsGenes, APCRisk FactorsRectal DiseasesCell Line, TumorProto-Oncogene Proteins B-rafDNA, NeoplasmMutationDNA MethylationColonic DiseasesNeoplasm ProteinsSurvival AnalysisGenes, rasProspective StudiesSurvival RateTreatment Outcomeras Proteinsbeta CateninAntineoplastic Combined Chemotherapy ProtocolsGerm-Line MutationColonography, Computed TomographicAntineoplastic AgentsAdenomatous Polyposis Coli ProteinRetrospective StudiesAntimetabolites, AntineoplasticBase Pair MismatchDNA Mutational AnalysisAdaptor Proteins, Signal TransducingIncidenceNeoplasm InvasivenessHepatectomyPolymerase Chain ReactionFollow-Up StudiesAntibodies, Monoclonal, HumanizedDisease ProgressionAdenocarcinoma, MucinousCohort StudiesLymphatic MetastasisProto-Oncogene ProteinsNeoplasm Recurrence, LocalPolymorphism, GeneticGenotypeAntibodies, MonoclonalEnemaGenes, DCCSigmoid NeoplasmsDisease-Free SurvivalTime FactorsSensitivity and SpecificityReverse Transcriptase Polymerase Chain ReactionCpG IslandsRiskRNA, MessengerOdds RatioBarium SulfateLoss of HeterozygosityTumor Cells, CulturedPrecancerous ConditionsThymidylate Synthase