Carcinoid TumorAdenocarcinomaMalignant Carcinoid SyndromeCarcinoid Heart DiseaseIleal NeoplasmsAppendiceal NeoplasmsBronchial NeoplasmsGastrointestinal NeoplasmsIntestinal NeoplasmsNeuroendocrine TumorsTumor Markers, BiologicalHydroxyindoleacetic AcidChromograninsOctreotideChromogranin ACell Line, TumorLung NeoplasmsDuodenal NeoplasmsACTH Syndrome, EctopicPancreatic NeoplasmsTumor BurdenStomach NeoplasmsTumor Necrosis Factor-alphaThymus NeoplasmsImmunohistochemistryNeoplasm MetastasisLiver NeoplasmsCommon Bile Duct NeoplasmsCarcinoma, NeuroendocrineNeoplasms, ExperimentalAmpulla of VaterNeoplasms, Multiple PrimaryParaneoplastic Endocrine SyndromesGenes, Tumor SuppressorWilms TumorColonic NeoplasmsTumor Suppressor Protein p53Jejunal NeoplasmsProctoscopyTomography, X-Ray ComputedNeoplasm StagingEndocrine Gland NeoplasmsMammary Neoplasms, ExperimentalIndium RadioisotopesEsophageal NeoplasmsEnterochromaffin CellsSomatostatinRectal NeoplasmsTumor Suppressor ProteinsAdenocarcinoma, MucinousCell ProliferationTreatment OutcomeReceptors, SomatostatinRetrospective Studies3-IodobenzylguanidineAppendixImmunoenzyme TechniquesPrognosisBrain NeoplasmsGastrinsTumor MicroenvironmentDNA, NeoplasmCushing SyndromeDigestive System NeoplasmsDuodenoscopyLymphatic MetastasisAdenocarcinoma, PapillaryEar NeoplasmsPolypsCarcinoma, Pancreatic DuctalTransplantation, HeterologousNeovascularization, PathologicParaganglioma, Extra-AdrenalRNA, MessengerCarcinoma, Squamous CellTime FactorsNeoplasm ProteinsAdenomaAdenocarcinoma, Bronchiolo-AlveolarDisease ProgressionReverse Transcriptase Polymerase Chain ReactionAntigens, NeoplasmKidney NeoplasmsGlomus TumorAppendectomySynaptophysinBarrett EsophagusNeoplasm Recurrence, LocalCarcinoma, Small CellGene Expression Regulation, NeoplasticSurvival RateXenograft Model Antitumor AssaysBiopsyAdenoma, Islet CellPhosphopyruvate HydrataseMutationFlushingOvarian NeoplasmsSurvival AnalysisEnterochromaffin-like Cells