Colonic PolypsPolypsIntestinal PolypsColonography, Computed TomographicAdenomatous PolypsColonoscopyColonic NeoplasmsAdenomatous Polyposis ColiColonDiverticulosis, ColonicAdenomaNasal PolypsRectal DiseasesSigmoid DiseasesGenes, APCRadiographic Image Interpretation, Computer-AssistedIntestinal MucosaColorectal NeoplasmsColonic DiseasesRetrospective StudiesEarly Detection of CancerSensitivity and SpecificityStomach NeoplasmsProstatic NeoplasmsOvarian NeoplasmsBreast NeoplasmsLung Neoplasms