Carcinoid TumorMalignant Carcinoid SyndromeCarcinoid Heart DiseaseIleal NeoplasmsBronchial NeoplasmsAppendiceal NeoplasmsGastrointestinal NeoplasmsNeuroendocrine TumorsHydroxyindoleacetic AcidIntestinal NeoplasmsChromograninsOctreotideChromogranin ATumor Markers, BiologicalACTH Syndrome, EctopicTumor BurdenCell Line, TumorTumor Necrosis Factor-alphaDuodenal NeoplasmsThymus NeoplasmsLiver NeoplasmsParaneoplastic Endocrine SyndromesWilms TumorNeoplasm MetastasisCarcinoma, NeuroendocrineProctoscopyNeoplasms, ExperimentalGenes, Tumor SuppressorCommon Bile Duct NeoplasmsLung NeoplasmsEndocrine Gland NeoplasmsIndium RadioisotopesAdenocarcinomaTumor Suppressor Protein p53Enterochromaffin CellsSomatostatinTomography, X-Ray ComputedAmpulla of VaterPancreatic NeoplasmsStomach NeoplasmsImmunohistochemistry3-IodobenzylguanidineJejunal NeoplasmsReceptors, SomatostatinNeoplasms, Multiple PrimaryCushing SyndromeAppendixTumor Suppressor ProteinsBrain NeoplasmsGastrinsTumor MicroenvironmentDuodenoscopyParaganglioma, Extra-AdrenalEar NeoplasmsCell ProliferationMammary Neoplasms, ExperimentalDigestive System NeoplasmsTreatment OutcomePolypsGlomus TumorRetrospective StudiesRectal NeoplasmsNeovascularization, PathologicAppendectomySynaptophysinPhosphopyruvate HydrataseAdenoma, Islet CellFlushingColonic NeoplasmsEnterochromaffin-like CellsKidney NeoplasmsTransplantation, HeterologousMultiple Endocrine Neoplasia Type 1Neoplasm StagingDNA, NeoplasmTime FactorsImmunoenzyme TechniquesIodobenzenesGastrointestinal Stromal TumorsLymphatic MetastasisXenograft Model Antitumor AssaysApudomaSerotoninPentetic AcidRNA, MessengerOrbital NeoplasmsMeckel DiverticulumNeoplasm Recurrence, LocalCarcinoma, Small CellMice, Inbred BALB CNeoplasm ProteinsReverse Transcriptase Polymerase Chain ReactionAntigens, NeoplasmNeoplasmsMuridaeSignal TransductionRadiopharmaceuticalsCell DivisionDisease Progression