Carcinoid TumorMalignant Carcinoid SyndromeCarcinoid Heart DiseaseIleal NeoplasmsBronchial NeoplasmsAppendiceal NeoplasmsCrystallographyHydroxyindoleacetic AcidIntestinal NeoplasmsChromograninsOctreotideNeuroendocrine TumorsChromogranin AACTH Syndrome, EctopicDuodenal NeoplasmsThymus NeoplasmsTumor Markers, BiologicalParaneoplastic Endocrine SyndromesProctoscopyCarcinoma, NeuroendocrineCommon Bile Duct NeoplasmsEnterochromaffin CellsLiver NeoplasmsPhenoxybenzamine3-IodobenzylguanidineAmpulla of VaterEndocrine Gland NeoplasmsReceptors, SomatostatinSomatostatinIndium RadioisotopesAppendixCell Line, TumorTomography, X-Ray ComputedJejunal NeoplasmsCushing SyndromeTumor BurdenGastrinsDuodenoscopyStomach NeoplasmsTumor Necrosis Factor-alphaNeoplasm MetastasisParaganglioma, Extra-AdrenalNeoplasms, Multiple PrimaryPolypsImmunohistochemistryEar NeoplasmsAppendectomyPancreatic NeoplasmsDigestive System NeoplasmsFlushingRetrospective StudiesSynaptophysinEnterobiusPhosphopyruvate HydrataseAdenocarcinomaRectal NeoplasmsIodobenzenesMultiple Endocrine Neoplasia Type 1Treatment OutcomeApudomaSerotoninMeckel DiverticulumAdenoma, Islet CellWilms TumorGlomus TumorOrbital NeoplasmsMuridaeRectal Prolapse