Perioperative Hypertensive Urgency After Methylene Blue in a Patient With Undiagnosed Pheochromocytoma: A Case Report.

We report the perioperative course of a 75-year-old woman undergoing robotic-assisted laparoscopic hysterectomy and tumor debulking. The patient developed severe, persistent hypertension after intraoperative methylene blue administration requiring a Surgical Intensive Care Unit admission with further investigative evaluation revealing a previously undiagnosed pheochromocytoma. Our discussion focuses on the differential diagnoses for her perioperative hypertension. We evaluate whether methylene blue triggered a pheochromocytoma crisis in our patient and emphasize the caution and critical thinking we all should demonstrate while providing anesthetic care.