Adenomatous PolypsIntestinal PolyposisAdenomatous Polyposis ColiPolypsIntestinal PolypsColonic PolypsBone Morphogenetic Protein Receptors, Type INeoplastic Syndromes, HereditarySmad4 ProteinAdenomatous Polyposis Coli ProteinHamartoma Syndrome, MultiplePeutz-Jeghers SyndromeAdenomaGerm-Line MutationColorectal NeoplasmsColonoscopyGenes, APCRectumColonic NeoplasmsTelangiectasia, Hereditary HemorrhagicNasal PolypsSigmoidoscopyColonography, Computed TomographicGastrointestinal NeoplasmsChromosomes, Human, Pair 10Gardner SyndromeColonIntestinal MucosaHyperplasiaRectal NeoplasmsPTEN PhosphohydrolaseSulindacTrans-ActivatorsCecal Neoplasmsbeta CateninBarium SulfatePrecancerous ConditionsEnemaRectal DiseasesAdenocarcinomaFibromatosis, AggressiveDuodenal NeoplasmsSigmoid NeoplasmsCytoskeletal ProteinsCystadenomaOccult BloodIntestinal NeoplasmsProctocolectomy, RestorativeAnti-Inflammatory Agents, Non-SteroidalEndoscopyDiverticulum, ColonMutationColon, TransverseCase-Control StudiesFibromatosis, AbdominalAxin ProteinColonic PouchesRisk FactorsImmunohistochemistryOsteomaCarcinomaBiopsySinusitisMass ScreeningChromosomes, Human, Pair 5DuodenoscopyRetrospective StudiesVegetablesAdenomatosis, PulmonaryDNA Mutational AnalysisRhinitis