Neuroendocrine TumorsPancreatic NeoplasmsCarcinoma, NeuroendocrineVipomaGlucagonomaChromogranin AGastrinomaOctreotidevon Hippel-Lindau DiseaseInsulinomaMultiple Endocrine Neoplasia Type 1SomatostatinomaCarcinoma, Islet CellPyrrolesCarcinoid TumorPancreaticoduodenectomyReceptors, SomatostatinEndosonographyIndolesGastrointestinal NeoplasmsSirolimusImmunohistochemistryTumor Markers, BiologicalPancreasNeurosecretory SystemsSomatostatinTomography, X-Ray ComputedLiver NeoplasmsTreatment OutcomeAntineoplastic AgentsBrain NeoplasmsNeuroendocrine CellsWilms TumorPrognosisRetrospective StudiesDigestive System NeoplasmsChromograninsPancreatectomyPancreatic CystIntestinal NeoplasmsTumor BurdenCell Line, TumorIleal NeoplasmsRadiopharmaceuticalsTumor Necrosis Factor-alphaEndocrine Gland Neoplasms