Carcinoid TumorMalignant Carcinoid SyndromeCarcinoid Heart DiseaseStomachIleal NeoplasmsStomach NeoplasmsBronchial NeoplasmsAppendiceal NeoplasmsHydroxyindoleacetic AcidGastrointestinal NeoplasmsOctreotideStomach DiseasesChromogranin AIntestinal NeoplasmsNeuroendocrine TumorsChromograninsACTH Syndrome, EctopicGastric MucosaStomach UlcerThymus NeoplasmsEnterochromaffin CellsDuodenal NeoplasmsCarcinoma, NeuroendocrineSomatostatinParaneoplastic Endocrine SyndromesGastrinsReceptors, SomatostatinAppendixLiver NeoplasmsJejunal NeoplasmsCushing SyndromeLung NeoplasmsFlushingIndium Radioisotopes3-IodobenzylguanidineSerotoninCommon Bile Duct NeoplasmsAmpulla of VaterProctoscopyPolypsDigestive System NeoplasmsGastroscopyEnterochromaffin-like CellsGastrectomyPyloric AntrumNeoplasms, Multiple PrimarySynaptophysinImmunohistochemistryMultiple Endocrine Neoplasia Type 1Tomography, X-Ray ComputedDuodenoscopyStomach RupturePancreatic NeoplasmsPhosphopyruvate HydratasePentetic AcidAppendectomyGastric FundusAdenocarcinomaTricuspid ValveGastrointestinal MotilityStomach Volvulus