Neuroendocrine TumorsPituitary NeoplasmsPituitary GlandCarcinoma, NeuroendocrineCarcinoid TumorOctreotideChromogranin APituitary Gland, AnteriorAdenomaPancreatic NeoplasmsGastrointestinal NeoplasmsNeurosecretory SystemsReceptors, SomatostatinProlactinomaNeuroendocrine CellsSomatostatinAdenoma, ChromophobeChromograninsTumor Markers, BiologicalDigestive System NeoplasmsProlactinPituitary HormonesPituitary ApoplexySecurinIntestinal NeoplasmsTumor BurdenCell Line, TumorEndocrine Gland NeoplasmsIleal NeoplasmsPituitary DiseasesACTH-Secreting Pituitary AdenomaAdrenocorticotropic HormoneVipomaGrowth Hormone-Secreting Pituitary AdenomaImmunohistochemistryMultiple Endocrine Neoplasia Type 1Tumor Necrosis Factor-alphaGastrinomaPituitary ACTH HypersecretionGrowth HormoneBronchial NeoplasmsGlucagonomaBromocriptineRadiopharmaceuticalsPituitary Hormones, AnteriorNeoplasms, ExperimentalThyrotropin-Releasing HormoneAcromegalyGenes, Tumor SuppressorParagangliomaCarcinoma, Islet CellLiver NeoplasmsNeoplasm ProteinsPheochromocytomaRNA, MessengerTumor Suppressor Protein p53Wilms TumorTomography, X-Ray ComputedSella TurcicaOrganometallic CompoundsNeoplasm MetastasisIndium RadioisotopesPituitary Function TestsCushing SyndromeCell ProliferationSomatotrophsTumor Suppressor ProteinsTreatment OutcomeInsulinomaHypopituitarismLutetiumDuodenal NeoplasmsKi-67 AntigenApudomaYttrium RadioisotopesLung NeoplasmsSomatostatinomaNeuroectodermal TumorsNeovascularization, PathologicSynaptophysinHuman Growth HormoneNeoplasm StagingAdenocarcinomaPositron-Emission TomographyPro-OpiomelanocortinRetrospective StudiesPituitary Gland, PosteriorMagnetic Resonance ImagingCarcinoma, Small CellPituitary Adenylate Cyclase-Activating PolypeptideBrain NeoplasmsReverse Transcriptase Polymerase Chain ReactionGene Expression Regulation, NeoplasticSignal TransductionAdrenal Gland NeoplasmsPentetic AcidTime FactorsGallium RadioisotopesTumor MicroenvironmentAntineoplastic Agents