InsulinomaAdenoma, Islet CellPancreatic NeoplasmsGlucagonomaGastrinomaReceptors, SomatostatinCalcium GluconatePancreatectomyNesidioblastosisMultiple Endocrine Neoplasia Type 1VipomaHypoglycemiaEndocrine Gland NeoplasmsJejunal NeoplasmsProinsulinPentetic AcidIslet Amyloid PolypeptideIntraoperative CareOctreotideHepatic VeinsNeuroendocrine TumorsInsulinHeterocyclic Compounds, 1-RingIslets of LangerhansEndosonographyInjections, Intra-ArterialC-PeptideIndium RadioisotopesGastrointestinal NeoplasmsSomatostatinPancreasBlood GlucoseInsulin-Secreting CellsImmunohistochemistryTomography, X-Ray ComputedTomography, Emission-Computed, Single-PhotonLiver NeoplasmsProto-Oncogene ProteinsSensitivity and SpecificityRNA, MessengerGene Expression Regulation, NeoplasticPrognosis