Treatment of Pheochromocytoma in Paraganglioma
Clinical Scenario
A paraganglioma is a tumor derived from extra-adrenal chromaffin cells of the sympathetic paravertebral ganglia of the thorax, abdomen, and pelvis. When hormonally functional, it shares the same perioperative risks as adrenal pheochromocytoma and requires careful preoperative preparation before any surgical intervention.
Surgical approach depends on tumor characteristics: open resection is preferred for paragangliomas, though laparoscopic resection may be considered for small, noninvasive tumors in surgically favorable locations.
Treatment Approach (Overview)
Management centers on preoperative adrenergic blockade initiated before surgery. The protocol specifies which class of receptor blocker is used first and under what conditions a second class is added — along with volume and dietary measures to address catecholamine-induced cardiovascular changes.
Full sequence, agent selection criteria, and timing details are in the structured protocol →
Target Goals
- Blood pressure < 130/80 mm Hg while seated
- Systolic blood pressure > 90 mm Hg while standing
- Heart rate 60–70 bpm seated; 70–80 bpm standing
References
DOI: 10.1210/jc.2014-1498
- We suggest open resection for paragangliomas, but laparoscopic resection can be performed for small, noninvasive paragangliomas in surgically favorable locations.
- A paraganglioma is a tumor derived from extra-adrenal chromaffin cells of the sympathetic paravertebral ganglia of thorax, abdomen, and pelvis.
- We recommend that all patients with a hormonally functional PPGL should undergo preoperative blockade to prevent perioperative cardiovascular complications.
- We suggest α-adrenergic receptor blockers as the first choice.
- We recommend preoperative medical treatment for 7 to 14 days to allow adequate time to normalize blood pressure and heart rate.
- Treatment should also include a high-sodium diet and fluid intake to reverse catecholamine-induced blood volume contraction preoperatively to prevent severe hypotension after tumor removal.
- Continuous administration of saline (1–2 L) is also helpful if started the evening before surgery.
- Preoperative coadministration of β-adrenergic receptor blockers is indicated to control tachycardia only after administration of α-adrenergic receptor blockers.
- Based on retrospective studies and institutional experience, a target blood pressure of less than 130/80 mm Hg while seated and greater than 90 mm Hg systolic while standing seems reasonable, with a target heart rate of 60–70 bpm seated and 70–80 bpm standing.
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