Preoperative Levels of Catecholamines and Metanephrines and Intraoperative Hemodynamics of Patients Undergoing Pheochromocytoma and Paraganglioma Resection

Substantial intraoperative hemodynamic instability was encountered in patients with PGL-PCC resection, regardless of preoperative hormonal activity level; therefore, universal preoperative adrenergic receptor blockade should be recommended. Postoperative hypotension was rare and more prevalent in those with higher preoperative hormonal activity.