Carcinoid TumorMalignant Carcinoid SyndromeCarcinoid Heart DiseaseIleal NeoplasmsBronchial NeoplasmsAppendiceal NeoplasmsHydroxyindoleacetic AcidOctreotideGastrointestinal NeoplasmsChromogranin AIntestinal NeoplasmsChromograninsNeuroendocrine TumorsACTH Syndrome, EctopicThymus NeoplasmsEnterochromaffin CellsDuodenal NeoplasmsCarcinoma, NeuroendocrineParaneoplastic Endocrine SyndromesSomatostatinReceptors, SomatostatinAppendixCushing SyndromeFlushing3-IodobenzylguanidineJejunal NeoplasmsIndium RadioisotopesLiver NeoplasmsCommon Bile Duct NeoplasmsLung NeoplasmsProctoscopyAmpulla of VaterSerotoninSynaptophysinGastrinsMultiple Endocrine Neoplasia Type 1DuodenoscopyPhosphopyruvate HydrataseStomach NeoplasmsAppendectomyNeoplasms, Multiple PrimaryPolypsTomography, X-Ray ComputedEnterochromaffin-like CellsPentetic AcidTricuspid ValveDigestive System Neoplasms