Carcinoid TumorMalignant Carcinoid SyndromeCarcinoid Heart DiseaseInflammatory Bowel DiseasesIleal NeoplasmsBronchial NeoplasmsAppendiceal NeoplasmsIrritable Bowel SyndromeHydroxyindoleacetic AcidIntestinal NeoplasmsOctreotideGastrointestinal NeoplasmsChromogranin ANeuroendocrine TumorsChromograninsACTH Syndrome, EctopicShort Bowel SyndromeThymus NeoplasmsDuodenal NeoplasmsCrohn DiseaseEnterochromaffin CellsColitis, UlcerativeCarcinoma, NeuroendocrineParaneoplastic Endocrine SyndromesSomatostatinAppendixReceptors, SomatostatinFlushingIndium RadioisotopesCushing Syndrome3-IodobenzylguanidineLiver NeoplasmsJejunal NeoplasmsColonCommon Bile Duct NeoplasmsLung NeoplasmsProctoscopySerotoninAmpulla of VaterAbdominal PainTomography, X-Ray ComputedConstipationSynaptophysinGastrinsIntestinal DiseasesDefecationGastrointestinal TransitIntestinal MucosaMultiple Endocrine Neoplasia Type 1IleumDuodenoscopyGastrointestinal AgentsRectal NeoplasmsAppendectomyPhosphopyruvate HydrataseStomach NeoplasmsPolypsNeoplasms, Multiple PrimaryIntestine, LargeDigestive System NeoplasmsTreatment OutcomeRectumPentetic AcidEnterochromaffin-like CellsDiarrheaTricuspid ValvePancreatic NeoplasmsRetrospective StudiesNeurogenic BowelImmunohistochemistry