Neuroendocrine TumorsCarcinoma, NeuroendocrinePancreatic NeoplasmsVipomaGlucagonomaChromogranin AOctreotideGastrinomavon Hippel-Lindau DiseaseInsulinomaMultiple Endocrine Neoplasia Type 1SomatostatinomaCarcinoma, Islet CellCarcinoid TumorPyrrolesNeurosecretory SystemsPancreaticoduodenectomyNeuroendocrine CellsReceptors, SomatostatinImmunohistochemistryGastrointestinal NeoplasmsEndosonographyIndolesSirolimusPancreasLiver NeoplasmsTumor Markers, BiologicalCarcinomaSomatostatinChromograninsAntineoplastic AgentsTomography, X-Ray ComputedTreatment OutcomePrognosisDigestive System NeoplasmsRetrospective StudiesPancreatectomyBrain NeoplasmsPancreatic CystIntestinal NeoplasmsCarcinoma, Squamous CellIleal NeoplasmsWilms TumorCarcinoma, HepatocellularBronchial NeoplasmsLung NeoplasmsRadiopharmaceuticalsEndocrine Gland NeoplasmsCell Line, TumorCarcinoma, Small Cell