Carcinoid TumorMalignant Carcinoid SyndromeCarcinoid Heart DiseaseIleal NeoplasmsBronchial NeoplasmsAppendiceal NeoplasmsGastrointestinal NeoplasmsHydroxyindoleacetic AcidIntestinal NeoplasmsChromograninsOctreotideNeuroendocrine TumorsChromogranin AACTH Syndrome, EctopicDuodenal NeoplasmsThymus NeoplasmsTumor Markers, BiologicalParaneoplastic Endocrine SyndromesProctoscopyCarcinoma, NeuroendocrineCommon Bile Duct NeoplasmsEnterochromaffin CellsLiver Neoplasms3-IodobenzylguanidineAmpulla of VaterEndocrine Gland NeoplasmsLung NeoplasmsReceptors, SomatostatinSomatostatinIndium RadioisotopesCell Line, TumorAppendixJejunal NeoplasmsCushing SyndromeTumor BurdenGastrinsDuodenoscopyTumor Necrosis Factor-alphaStomach NeoplasmsTomography, X-Ray ComputedParaganglioma, Extra-AdrenalNeoplasm MetastasisPolypsNeoplasms, Multiple PrimaryEar NeoplasmsAppendectomyImmunohistochemistryDigestive System NeoplasmsFlushingPancreatic NeoplasmsSynaptophysinEnterochromaffin-like CellsPhosphopyruvate HydrataseRectal NeoplasmsIodobenzenesAdenocarcinomaMultiple Endocrine Neoplasia Type 1SerotoninApudomaMeckel DiverticulumAdenoma, Islet CellWilms TumorRetrospective StudiesGlomus TumorMuridaeTreatment Outcome