Petrosal Sinus SamplingACTH Syndrome, EctopicPituitary ACTH HypersecretionCushing SyndromeACTH-Secreting Pituitary AdenomaAdrenocorticotropic HormoneCorticotropin-Releasing HormoneCranial SinusesPituitary NeoplasmsCavernous SinusAntidiuretic AgentsPituitary IrradiationHydrocortisoneCarotid-Cavernous Sinus FistulaCentral Nervous System Vascular MalformationsPetrous BoneOccipital BoneAdenoma