Adenomatous PolypsColonic PolypsPolypsIntestinal PolypsAdenomatous Polyposis ColiAdenomaColonoscopyHyperplasiaColorectal NeoplasmsNasal PolypsAdenomatous Polyposis Coli ProteinColonic NeoplasmsColonography, Computed TomographicColonSigmoidoscopyPrecancerous ConditionsRectal NeoplasmsIntestinal MucosaRectal DiseasesStomach DiseasesRectumAdenoma, VillousGenes, APCAdenocarcinomaGardner SyndromeBarium SulfateCecal NeoplasmsEnemaIntestinal PolyposisMucin-6Duodenal NeoplasmsCase-Control StudiesDuodenoscopyImmunohistochemistrySulindacSigmoid NeoplasmsAnti-Inflammatory Agents, Non-SteroidalEndoscopy, GastrointestinalProlapseIntestine, LargeGastroscopyRisk FactorsCystadenomaOccult BloodColon, AscendingDiverticulum, ColonMutationEndoscopyGerm-Line MutationNarrow Band Imagingbeta CateninColon, TransverseCarcinomaColon, DescendingColonic DiseasesRetrospective StudiesPolyphosphatesMicrosatellite RepeatsNeoplasms, Multiple PrimaryGenes, rasProto-Oncogene Proteins B-rafTumor Markers, BiologicalStomach NeoplasmsBiopsyOdds RatioIntestinal NeoplasmsFibromatosis, AggressiveMass ScreeningDisease ProgressionCytoskeletal ProteinsPeutz-Jeghers Syndrome