Neuroendocrine TumorsAdenocarcinomaCarcinoma, NeuroendocrineCarcinoid TumorPancreatic NeoplasmsChromogranin AOctreotideGastrointestinal NeoplasmsNeurosecretory SystemsReceptors, SomatostatinNeuroendocrine CellsDigestive System NeoplasmsChromograninsIntestinal NeoplasmsTumor Markers, BiologicalIleal NeoplasmsSomatostatinVipomaLung NeoplasmsGastrinomaImmunohistochemistryEndocrine Gland NeoplasmsBronchial NeoplasmsGlucagonomaCell Line, TumorRadiopharmaceuticalsStomach NeoplasmsCarcinoma, Islet CellDuodenal NeoplasmsParagangliomaTumor BurdenOrganometallic CompoundsPheochromocytomaLiver NeoplasmsNeoplasm StagingAdenocarcinoma, MucinousIndium RadioisotopesLutetiumInsulinomaApudomaMultiple Endocrine Neoplasia Type 1Neoplasm MetastasisTomography, X-Ray ComputedCarcinoma, Pancreatic DuctalPrognosisYttrium RadioisotopesCarcinoma, Small CellSomatostatinomaSynaptophysinTreatment OutcomeEsophageal NeoplasmsCommon Bile Duct NeoplasmsCarcinoma, Large CellPositron-Emission TomographyAdrenal Gland Neoplasms3-IodobenzylguanidineTumor Necrosis Factor-alphaRetrospective StudiesCarcinoma, Acinar CellNeuroectodermal TumorsAmpulla of VaterAdenocarcinoma, PapillaryAntineoplastic AgentsPancreaticoduodenectomyGallium RadioisotopesGene Expression Regulation, NeoplasticKi-67 AntigenParaganglioma, Extra-AdrenalPentetic AcidNeoplasms, Multiple PrimaryTumor Suppressor Protein p53Cell ProliferationColonic NeoplasmsBarrett EsophagusZollinger-Ellison SyndromeAdenocarcinoma, Bronchiolo-AlveolarNeoplasms, Complex and MixedNeoplasms, ExperimentalNeoplasm ProteinsPancreatectomyNervous System NeoplasmsFatal OutcomeSurvival AnalysisRNA, MessengerDisease ProgressionCarcinoma, MedullaryEndosonographyGenes, Tumor SuppressorCarcinoma, Merkel CellNeuroendocrine Secretory Protein 7B2Mammary Neoplasms, ExperimentalThymus NeoplasmsDNA, NeoplasmSurvival RatePhosphopyruvate HydratasePyrrolesLymphatic MetastasisAdenoma, Islet CellReverse Transcriptase Polymerase Chain ReactionKaplan-Meier Estimate