IleumRectumRectal NeoplasmsRectal DiseasesColonAnal CanalIntestinal MucosaGuinea PigsProctoscopyMuscle, SmoothMyenteric PlexusColon, SigmoidSigmoid NeoplasmsIntestinal PolypsIntestine, SmallIleal DiseasesGastrointestinal MotilityMuscle ContractionIleitisMegacolonProctitisRectal ProlapseColostomyIntestinesTime FactorsColonic NeoplasmsIleal NeoplasmsIntestine, LargeAdministration, RectalColonoscopyCecumIntestinal AbsorptionIleostomyDefecationDigestive System Surgical ProceduresDuodenumDigestive SystemColectomyColitis, UlcerativeAtropineColorectal NeoplasmsCecal NeoplasmsSigmoidoscopyAdenocarcinomaGastrointestinal HemorrhageColonic DiseasesEnemaRadiotherapy Planning, Computer-AssistedAnastomosis, SurgicalGastrointestinal TransitCrohn DiseaseGastrointestinal TractSurgical StaplersAdenoma, VillousElectric StimulationConstipationIntestinal ObstructionColon, DescendingTreatment OutcomeRadiotherapy DosagePerineumIntestinal PerforationAnus, ImperforateDigestive System NeoplasmsDiphenylacetic AcidsBrachytherapyUlcerGastrointestinal NeoplasmsUrinary BladderSwineIntestinal DiseasesPelvisAdenomaOrgans at RiskHexamethonium CompoundsEnteric Nervous SystemColon, TransverseIleocecal ValveFecesRectovaginal FistulaProctocolectomy, RestorativeIntestinal NeoplasmsFollow-Up StudiesRabbitsSubstance PVaginaPolyphloretin PhosphateFecal IncontinenceNeoplasms, Multiple PrimaryBiopsyPolypsRadiotherapy, Intensity-ModulatedRetrospective StudiesAcetylcholineDose-Response Relationship, DrugTomography, X-Ray ComputedImmunohistochemistryEnteritisBarium SulfateColonic Polyps