Colonic PolypsPolypsIntestinal PolypsAdenomatous PolypsColonography, Computed TomographicColonoscopyAdenomaHyperplasiaNasal PolypsColonic NeoplasmsColonRectal DiseasesAdenomatous Polyposis ColiColorectal NeoplasmsDiverticulosis, ColonicGenes, APCIntestinal MucosaSigmoid DiseasesStomach DiseasesColonic DiseasesAdenoma, VillousRadiographic Image Interpretation, Computer-AssistedPrecancerous ConditionsMucin-6Intestinal PolyposisProlapseRectal NeoplasmsIntestine, LargeEndoscopy, GastrointestinalGastroscopyDuodenoscopyColon, AscendingColon, DescendingRectumNarrow Band ImagingDuodenal NeoplasmsRetrospective StudiesPolyphosphatesImmunohistochemistryAdenocarcinomaProto-Oncogene Proteins B-rafMicrosatellite RepeatsSensitivity and SpecificityGenes, rasStomach Neoplasms