Adenomatous PolypsColonic PolypsPolypsAdenomatous Polyposis ColiIntestinal PolypsAdenomaColonoscopyAdenomatous Polyposis Coli ProteinColorectal NeoplasmsColonic NeoplasmsNasal PolypsSigmoidoscopyColonography, Computed TomographicColonHyperplasiaRectal NeoplasmsIntestinal MucosaRectumBarium SulfateGardner SyndromeCecal NeoplasmsEnemaGenes, APCPrecancerous ConditionsSulindacRectal DiseasesSigmoid NeoplasmsAdenocarcinomaCystadenomaOccult BloodDiverticulum, ColonColon, TransverseCase-Control StudiesGerm-Line MutationAnti-Inflammatory Agents, Non-Steroidalbeta CateninEndoscopyRisk FactorsMutationFibromatosis, AggressiveBiopsyDuodenal NeoplasmsMass ScreeningImmunohistochemistryRetrospective StudiesCarcinomaCytoskeletal ProteinsIntestinal NeoplasmsVegetablesAdenomatosis, PulmonaryProctocolectomy, Restorative