Pheochromocytoma treatment nearly always centers on surgical removal of the tumor, but the weeks of preparation before surgery are just as critical as the operation itself. These rare tumors, found in the adrenal glands, produce surges of adrenaline and related hormones that can cause dangerous spikes in blood pressure and heart rate. Removing the tumor without proper preparation can trigger a life-threatening cardiovascular crisis, so treatment follows a careful, staged approach.
Why Preparation Starts Weeks Before Surgery
The biggest risk with pheochromocytoma isn’t the tumor itself growing or spreading. It’s the flood of stress hormones it releases, especially when it’s physically handled during surgery. To bring that risk under control, doctors start blood pressure medications 2 to 3 weeks before the operation, with specific targets: below 130/80 mmHg when lying down and a systolic reading between 90 and 110 mmHg when standing up.
The first medication introduced is always an alpha-blocker, which relaxes blood vessels that have been chronically constricted by the tumor’s hormone output. Two commonly used options are phenoxybenzamine and doxazosin, and the dose is gradually increased based on blood pressure readings. Only after the alpha-blocker is working well can a beta-blocker (which slows heart rate) be added. This sequence is non-negotiable: starting a beta-blocker first, or without adequate alpha-blockade, can trigger an acute hypertensive crisis because the blood vessels remain clamped down while the heart loses its ability to compensate.
Alongside blood pressure control, you’ll typically be asked to follow a high-sodium diet of 3 to 5 grams per day. This sounds counterintuitive for someone with high blood pressure, but pheochromocytoma causes chronic blood vessel constriction that shrinks your effective blood volume over time. Loading up on salt and fluids helps expand that volume back to normal. In the final 24 hours before surgery, most patients also receive 1 to 2 liters of saline through an IV to further protect against a dangerous blood pressure drop once the tumor is removed and the hormone surge suddenly stops.
The Surgery Itself
Minimally invasive (laparoscopic) adrenalectomy is the standard approach for most pheochromocytomas. The surgeon works through several small incisions using a camera and specialized instruments, which means less pain, a shorter hospital stay, and faster recovery compared to open surgery. Most patients with tumors that appear well-contained on imaging are good candidates for this approach.
Open surgery, which requires a larger incision, is reserved for specific situations. Tumors larger than about 6 to 8 centimeters, those showing signs of invading surrounding tissue on imaging, or cases where primary adrenal cancer is suspected typically require the open approach to ensure the surgeon can remove all affected tissue with wide margins. If a laparoscopic procedure is underway and the surgeon encounters unexpected invasion or complexity, conversion to an open operation is a reasonable and sometimes necessary step. Patients who have had prior surgery on the same adrenal gland also face a higher chance of needing conversion.
During the operation, the anesthesia team closely monitors blood pressure on a moment-to-moment basis. When the surgeon handles the tumor, it can release a burst of hormones that sends blood pressure soaring within seconds. The anesthesia team uses fast-acting IV medications to counteract these spikes in real time. Once the blood supply to the tumor is clamped and the tumor is removed, blood pressure often drops sharply, and IV fluids and medications are used to keep it stable.
What Happens After Surgery
Once the tumor is out, your body needs time to adjust to the sudden absence of excess hormones. Blood pressure often drops in the first hours and days, which is why the preoperative fluid loading matters so much. Most patients spend at least a day or two in the hospital for close monitoring.
To confirm the tumor was fully removed, doctors check levels of plasma metanephrines, which are breakdown products of the hormones the tumor was producing. Guidelines recommend testing 2 to 4 weeks after surgery, though research has shown that levels measured as early as 3 to 7 days post-surgery are just as reliable and match one-year follow-up results. A normal result is strong evidence the tumor is gone.
Even after a successful operation, long-term follow-up is important. Pheochromocytomas can recur, sometimes years later. Annual or periodic blood tests for metanephrines are typically part of ongoing surveillance, and the schedule may be more frequent depending on your individual risk factors.
The Role of Genetic Testing
About 35% of pheochromocytomas in adults are caused by an inherited genetic mutation in one of at least 25 known susceptibility genes. In children, that number jumps to 70 to 80%. This makes genetic testing a high priority for nearly everyone diagnosed with the condition, not just those with a family history.
Modern testing uses gene panels that screen multiple genes at once, since the clinical presentation alone can’t reliably predict which gene is involved. The results matter practically: a positive genetic finding changes how often you need screening for recurrence, whether family members should be tested, and whether you’re at elevated risk for tumors in other locations (such as paragangliomas, which are related tumors that arise outside the adrenal glands).
When the Tumor Is Malignant or Can’t Be Removed
Roughly 10% of pheochromocytomas are malignant, meaning they’ve spread to other parts of the body. There’s no reliable way to determine malignancy from the tumor’s appearance under a microscope alone. The diagnosis of malignant pheochromocytoma is made when the tumor has metastasized to sites where adrenal tissue doesn’t normally exist, such as bone, liver, or lungs.
For metastatic disease, the primary chemotherapy regimen is a combination of three drugs (commonly called CVD) given in cycles every 21 to 28 days. The goal is to control tumor growth and reduce hormone production, which in turn controls symptoms like dangerously high blood pressure. Some patients eventually shift to longer intervals between cycles, sometimes 60 to 90 days, depending on how their body responds and tolerates treatment.
Radiation-based therapies that deliver targeted treatment to tumor cells expressing certain receptors are another option for metastatic cases. For patients who can’t undergo surgery due to tumor location or overall health, long-term medical management with alpha-blockers and other blood pressure medications can control symptoms, though it doesn’t address the underlying tumor.
Living With Pheochromocytoma Before Treatment
If you’ve been diagnosed and are in the preoperative preparation phase, there are practical things to know. The classic symptoms, including sudden severe headaches, rapid heartbeat, and drenching sweats, are caused by hormone surges and should improve as alpha-blockade takes effect. You may feel lightheaded when standing, especially as medications lower your blood pressure and your body adjusts. This is expected and is part of why the high-salt diet and fluid intake are so important during this period.
Certain triggers can provoke a hormone surge from the tumor before it’s removed. These include physical strain, certain anesthetics, and some common medications (including certain antidepressants and anti-nausea drugs). Your medical team will review your current medications and advise you on what to avoid. Physical activity doesn’t need to stop entirely, but heavy exertion or anything that increases abdominal pressure is best avoided until the tumor is out.