ACTH-Secreting Pituitary AdenomaPituitary ACTH HypersecretionAdrenocorticotropic HormonePituitary NeoplasmsCorticotrophsPro-OpiomelanocortinAdenomaPituitary GlandAdenoma, ChromophobeProprotein Convertase 1Pituitary Gland, AnteriorCorticotropin-Releasing HormoneThyrotrophsNelson SyndromeNADH Tetrazolium ReductaseCushing SyndromeLypressinACTH Syndrome, EctopicHydrocortisoneGalectin 3Tumor Markers, BiologicalReceptors, SomatostatinTumor BurdenTumor Necrosis Factor-alphaCell Line, TumorRNA, MessengerDog DiseasesCorticosteroneReceptors, VasopressinPituitary-Adrenal SystemImmunohistochemistryWilms TumorGlucocorticoidsNeoplasms, ExperimentalGenes, Tumor SuppressorCarcinoid TumorCell LineTumor Suppressor Protein p53Magnetic Resonance ImagingNeuroendocrine TumorsTumor Suppressor ProteinsBrain NeoplasmsTumor Microenvironment