What is the recommended treatment for pheochromocytoma prior to surgery?

• A. Beta-blockers
• B. Phenoxybenzamine (alpha-blocker)
• C. Chemotherapy
• D. Surgery alone

Answer: (B)

The recommended treatment for pheochromocytoma prior to surgery is phenoxybenzamine, which is an irreversible alpha-adrenergic blocker. The rationale for this choice is grounded in the pathophysiology of pheochromocytoma, which is characterized by excessive secretion of catecholamines, such as epinephrine and norepinephrine. These hormones can lead to severe hypertension, cardiac arrhythmias, and other cardiovascular complications.

By administering phenoxybenzamine before surgical intervention, the goal is to achieve adequate control of blood pressure and minimize the risk of hypertensive crises that may occur during or after tumor resection. This medication effectively blocks the peripheral effects of catecholamines, allowing for a more stable hemodynamic environment during surgery.

Preoperative management involves starting phenoxybenzamine at least 1 to 2 weeks prior to surgery to ensure that the body's adrenergic receptors are adequately blocked. This preparatory step is critical in the management of patients with pheochromocytoma to ensure a safer surgical experience and mitigate potential intraoperative complications.

In contrast, other treatments listed—such as beta-blockers—are not appropriate to initiate before adequate alpha blockade because they can exacerbate hypertension and are not effective without prior alpha-re