Multi-institutional study of risk factors for perioperative morbidity following transnasal endoscopic pituitary adenoma surgery.

Background: The goal of this study was to identify preoperative risk factors associated with increased perioperative morbidity after endoscopic pituitary surgery.

Methods: A retrospective review of patients undergoing endoscopic pituitary adenoma surgery between 2002 and 2014 at 6 international centers was performed. Standard demographic and comorbidity data, as well as information regarding tumor extent and treatment were collected.