Adenomatous PolypsIntestinal PolyposisAdenomatous Polyposis ColiPolypsColonic PolypsIntestinal PolypsPeutz-Jeghers SyndromeAdenomatous Polyposis Coli ProteinNeoplastic Syndromes, HereditaryBone Morphogenetic Protein Receptors, Type IColorectal NeoplasmsSyndromeAdenomaColonoscopyHamartoma Syndrome, MultipleGerm-Line MutationSmad4 ProteinGenes, APCColonic NeoplasmsHyperplasiaColonNasal PolypsSigmoidoscopyColonography, Computed TomographicGardner SyndromeGenetic TestingIntestinal MucosaRectumRectal NeoplasmsDNA Mutational AnalysisMutationSulindacCecal Neoplasmsbeta CateninBarium SulfatePrecancerous ConditionsEnemaRectal DiseasesAdenocarcinomaFibromatosis, AggressiveDuodenal NeoplasmsSigmoid NeoplasmsCytoskeletal ProteinsCystadenomaOccult BloodIntestinal NeoplasmsAnti-Inflammatory Agents, Non-SteroidalProctocolectomy, RestorativeEndoscopyCase-Control StudiesDiverticulum, ColonColon, TransverseFibromatosis, AbdominalRisk FactorsAxin ProteinDown SyndromeColonic PouchesMetabolic Syndrome XImmunohistochemistryBiopsyOsteomaCarcinomaChromosomes, Human, Pair 5SinusitisRetrospective StudiesMass ScreeningDuodenoscopyTrans-ActivatorsPedigreeVegetablesAdenomatosis, PulmonaryNephrotic SyndromePhenotypeDisease ProgressionColectomyRhinitis