Colonic PolypsColonic DiseasesPolypsColorectal NeoplasmsColonoscopyColonIntestinal PolypsColonography, Computed TomographicColonic NeoplasmsAdenomatous PolypsCrohn DiseaseEnemaAdenomaIntestinal MucosaColitis, UlcerativeRectumAdenomatous Polyposis ColiDiverticulosis, ColonicGenes, APCRectal DiseasesNasal PolypsSigmoid DiseasesRectal NeoplasmsColonic Diseases, FunctionalRadiographic Image Interpretation, Computer-AssistedEarly Detection of CancerColorectal Neoplasms, Hereditary NonpolyposisSigmoidoscopyAdenocarcinomaFluorouracilRetrospective StudiesOccult BloodTumor Markers, BiologicalNeoplasm StagingNeoplasm MetastasisPrognosisOrganoplatinum CompoundsSensitivity and SpecificityGene Expression Regulation, NeoplasticHT29 CellsLeucovorinCamptothecinCarcinomaLiver NeoplasmsMass ScreeningCarcinoembryonic AntigenColectomyRisk FactorsImmunohistochemistryCell Line, TumorHCT116 CellsColitisMutationNeoplasm ProteinsColorectal SurgeryMicrosatellite InstabilityMicrosatellite RepeatsGenetic Predisposition to DiseaseProspective StudiesSurvival AnalysisDNA MethylationSurvival RateAntineoplastic Combined Chemotherapy ProtocolsCase-Control StudiesNeoplasm InvasivenessDNA, NeoplasmAntineoplastic AgentsMutS Homolog 2 ProteinGerm-Line MutationProto-Oncogene Proteins B-rafReverse Transcriptase Polymerase Chain ReactionDisease ProgressionPrecancerous ConditionsTreatment OutcomeFollow-Up StudiesRNA, MessengerStomach Neoplasmsbeta CateninRiskDNA Mismatch Repairras ProteinsAzoxymethaneMice, NudeGenes, rasNeoplasmsPolymerase Chain ReactionGenotypeAntimetabolites, AntineoplasticLung NeoplasmsIncidenceBreast NeoplasmsBarium SulfateDisease-Free SurvivalGastrointestinal TransitNeoplasm Recurrence, LocalAntibodies, MonoclonalUnited StatesAntibodies, Monoclonal, HumanizedPolymorphism, GeneticRisk Assessment