Neuroendocrine TumorsTumor Markers, BiologicalCarcinoma, NeuroendocrineCarcinoid TumorChromogranin APancreatic NeoplasmsOctreotideGastrointestinal NeoplasmsNeurosecretory SystemsReceptors, SomatostatinDigestive System NeoplasmsNeuroendocrine CellsChromograninsIntestinal NeoplasmsCarcinoembryonic AntigenCA-19-9 AntigenSomatostatinCell Line, TumorTumor BurdenIleal NeoplasmsVipomaAntigens, Tumor-Associated, CarbohydrateImmunohistochemistryTumor Necrosis Factor-alphaLiver NeoplasmsBronchial NeoplasmsGastrinomaCA-125 AntigenRadiopharmaceuticalsEndocrine Gland NeoplasmsGlucagonomaNeoplasm StagingBiological MarkersNeoplasm MetastasisLung NeoplasmsAntigens, NeoplasmGenetic MarkersTissue Polypeptide AntigenAdenocarcinomaParagangliomaPrognosisCarcinoma, Islet CellTumor Suppressor Protein p53Treatment OutcomeTomography, X-Ray ComputedPhosphopyruvate HydrataseSensitivity and SpecificityPheochromocytomaWilms TumorApudomaOrganometallic Compoundsalpha-FetoproteinsNeoplasmsKeratin-19Neoplasms, ExperimentalGenes, Tumor SuppressorIndium RadioisotopesCarcinoma, Small CellPositron-Emission TomographyMucin-1Cell ProliferationNeoplasm ProteinsLutetiumInsulinomaDuodenal NeoplasmsRNA, MessengerMultiple Endocrine Neoplasia Type 1Retrospective StudiesYttrium RadioisotopesKi-67 AntigenBrain NeoplasmsSomatostatinomaNeuroectodermal TumorsReverse Transcriptase Polymerase Chain ReactionSynaptophysinAntineoplastic AgentsNeovascularization, PathologicStomach NeoplasmsTumor Suppressor ProteinsOvarian NeoplasmsDisease ProgressionTime FactorsSignal TransductionGene Expression Regulation, NeoplasticTumor MicroenvironmentTesticular NeoplasmsSurvival AnalysisGallium RadioisotopesCarcinoma, MedullaryPentetic AcidModels, Biological3-IodobenzylguanidineDNA, NeoplasmParaganglioma, Extra-AdrenalAdrenal Gland NeoplasmsMolecular Sequence DataSurvival RateAntibodies, MonoclonalNeoplasms, Germ Cell and EmbryonalGene Expression Profiling