A 45-year-old woman presents to the clinic with episodic palpitations, severe headaches, and unprovoked sweating. Her blood pressure during these episodes reaches 190/110 mmHg. The physician suspects a pheochromocytoma. Arrange the following steps in the correct chronological sequence for the standard workup and management of this condition.
- 1Measure 24-hour urine fractionated metanephrines
- 2Perform abdominal CT or MRI for tumor localization
- 3Initiate alpha-adrenergic blockade with phenoxybenzamine
- 4Initiate beta-adrenergic blockade to control heart rate
Cevap
The correct sequence is: Measure 24-hour urine fractionated metanephrines, followed by abdominal imaging, then initiate alpha-adrenergic blockade, and finally initiate beta-adrenergic blockade.
The standard evaluation and treatment of a pheochromocytoma follows a strict sequence: biochemically prove the tumor's hypersecretion, find its anatomical location, block the alpha receptors to control systemic pressure, and finally block the beta receptors to control heart rate before attempting surgical resection.
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Anahtar Kavram
Diagnosis and Preoperative Management Sequence for Pheochromocytoma