Neuroendocrine TumorsCarcinoma, NeuroendocrineCarcinoma, Ehrlich TumorCarcinoid TumorNeurosecretory SystemsNeuroendocrine CellsChromogranin AOctreotidePancreatic NeoplasmsGastrointestinal NeoplasmsCarcinomaChromograninsReceptors, SomatostatinDigestive System NeoplasmsTumor Markers, BiologicalIntestinal NeoplasmsSomatostatinCarcinoma, Squamous CellIleal NeoplasmsVipomaCarcinoma, HepatocellularImmunohistochemistryLiver NeoplasmsBronchial NeoplasmsGastrinomaEndocrine Gland NeoplasmsGlucagonomaCarcinoma, Small CellCell Line, TumorRadiopharmaceuticalsLung NeoplasmsSynaptophysinCarcinoma, Islet CellParagangliomaCarcinoma, Large CellPheochromocytomaTumor BurdenNeuroendocrine Secretory Protein 7B2Organometallic CompoundsCarcinoma, MedullaryCarcinoma, Merkel CellNeoplasm StagingInsulinomaApudomaAdenocarcinomaDuodenal NeoplasmsIndium RadioisotopesLutetiumNeoplasm MetastasisPrognosisTomography, X-Ray ComputedMultiple Endocrine Neoplasia Type 1Yttrium RadioisotopesCarcinoma in SituTreatment OutcomeSomatostatinomaThyroid NeoplasmsCarcinoma, PapillaryAdrenal Gland NeoplasmsRetrospective StudiesStomach NeoplasmsAntineoplastic Agents3-IodobenzylguanidinePositron-Emission TomographyNeuroectodermal TumorsPhosphopyruvate HydrataseKi-67 AntigenGene Expression Regulation, NeoplasticParaganglioma, Extra-AdrenalNervous System NeoplasmsGallium RadioisotopesCommon Bile Duct NeoplasmsPentetic AcidNeoplasms, Complex and MixedCell ProliferationRNA, MessengerTumor Necrosis Factor-alphaZollinger-Ellison SyndromeTumor Suppressor Protein p53Carcinoma, Ductal, BreastNeoplasm ProteinsThymus NeoplasmsNeoplasms, Multiple PrimaryAmpulla of VaterFatal OutcomeLymphatic MetastasisSurvival AnalysisEndocrine GlandsPyrrolesAdenoma, Islet CellReverse Transcriptase Polymerase Chain ReactionDNA, NeoplasmSurvival RateDisease ProgressionSkin NeoplasmsCarcinoma, Acinar CellPancreaticoduodenectomyGenes, Tumor SuppressorSignal TransductionNeoplasms, Experimental