Postoperative Management of Pheochromocytoma

Immediate Postoperative Care

The American College of Surgeons recommends immediate transfer of patients to an intensive care unit for aggressive hemodynamic monitoring and management of hypotension, hypoglycemia, and potential adrenal insufficiency for at least 24-48 hours 1, 2
Anticipate and aggressively treat postoperative hypotension with fluid resuscitation, as the sudden drop in catecholamine levels following tumor removal commonly causes significant blood pressure drops 1, 2
Monitor blood glucose levels closely and frequently as hypoglycemia commonly occurs after the sudden reduction in catecholamine levels 1, 2
Check glucose every 2-4 hours initially, as catecholamines normally antagonize insulin and promote gluconeogenesis 1

Administer high-dose hydrocortisone 150 mg/day during the immediate postoperative period, as recommended by the Endocrine Society 4, 5
Transition to maintenance therapy with oral hydrocortisone 15-25 mg/day in divided doses (2/3 morning, 1/3 afternoon) 5
Add fludrocortisone 0.05-0.2 mg daily for mineralocorticoid replacement, titrated based on blood pressure and serum potassium 5

Measure plasma or urine metanephrines at 2-8 weeks postoperatively to confirm complete tumor removal, as recommended by the European Society of Endocrinology 3, 1, 2
For functional tumors, biochemical testing should occur within this 2-8 week window 3
All patients require lifelong surveillance due to 10-15% recurrence risk, regardless of initial tumor characteristics 1

Monitor patients every 3-4 months for the first 2-3 years, then every 6 months thereafter, with blood pressure and adrenergic symptoms assessment at each visit 1
Perform plasma/urine metanephrines and chromogranin A every 3-4 months for 2-3 years, then every 6 months 1
First imaging at 3-6 months post-resection, as recommended by the European Society of Endocrinology 3

Patients with bilateral carotid body paragangliomas are at risk for postoperative baroreflex failure causing severe hemodynamic complications, and require vigorous treatment and careful monitoring during and after any procedure 3, 6
Recognize adrenal crisis symptoms, including severe hypotension, nausea, vomiting, abdominal pain, and altered mental status, and treat immediately with IV hydrocortisone 100 mg and aggressive fluid resuscitation 5