Pheochromocytoma: the adrenaline surges with a cause, the blood pressure that spikes, and the surgery that cures most
Last updated September 3, 2026.
A pheochromocytoma is a rare, usually non-cancerous tumor of the adrenal gland that produces adrenaline and its cousins in uncontrolled bursts, causing episodes of pounding heart, drenching sweats, severe headache, and a blood pressure that spikes to dangerous levels, often for years before anyone connects the episodes to a cause. The diagnosis, once suspected, is straightforward: blood or urine tests for the hormone breakdown products, then a scan to find the tumor. The treatment is surgery to remove the adrenal gland, and it cures the great majority, but the preparation matters as much as the operation: weeks of medication that blocks the adrenaline's grip on the blood vessels first, because operating on an unprepared tumor can trigger a crisis, and the preparation phase is the part patients find strangest, feeling sicker from the tablets before they feel better from the surgery. The worth-knowing parts: about a third of cases are inherited, so genetic testing is offered to most patients and sometimes finds the same tumor in relatives; a small share behave as cancer, which changes the follow-up; and the years of being told the episodes were panic attacks, the commonest wrong label, end properly when the chemistry proves otherwise.
What does it look like?
Episodes that arrive in surges: a pounding racing heart, drenching sweats, a severe headache, a feeling of doom, shaking, and a pale or flushed face, lasting minutes to an hour, then passing. Between episodes, high blood pressure that is hard to control, or blood pressure that swings wildly. Attacks can be triggered by physical strain, certain medicines, anesthesia, or nothing at all. The pattern of episodes plus blood pressure that resists control in a younger person is the classic picture.
Why does it happen?
The tumor grows from the adrenaline-producing cells of the adrenal medulla and secretes the hormones in bursts rather than in the body's normal controlled trickle. About a third of cases come from an inherited gene change, which is why genetic testing is offered to nearly everyone diagnosed, and why a positive result leads to screening for relatives and a surveillance plan for other linked tumors. The rest arise by chance.
How is it treated?
- Preparation comes before surgery, always. Weeks of alpha-blocking medication, then often a beta-blocker, bring the blood pressure under control and protect the heart during the operation. The preparation phase can feel rough, dizziness and stuffy nose are common, but skipping it is what makes surgery dangerous.
- Surgery removes the gland and usually cures. Keyhole removal of the adrenal is the standard operation, the hormone surges stop, and most blood pressures settle, some immediately, some over months.
- Genetic testing follows for most. A third of cases are inherited, so testing guides both your own surveillance and whether relatives should be screened.
- Follow-up runs long. Yearly hormone tests continue after surgery because a small share recur, and a small share behave as cancer needing a different plan.
When is it urgent?
An episode with chest pain, severe breathlessness, confusion, or a blood pressure reading far above your usual is an emergency, the surge can strain the heart and brain. Pymander's escalation routing is built and tested specifically for this class of decision; see the safety architecture working paper.
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Common questions
Why do I feel worse on the preparation medicines than I did before?
Because the medication is doing exactly what it is meant to do, and its side effects are the price of a safe operation. The alpha-blocker relaxes the blood vessels your tumor's adrenaline has been clamping for years, and the dizziness, stuffy nose, and washed-out fatigue are its classic signatures, not a sign anything is wrong. The preparation exists for a serious reason: operating on an unprepared pheochromocytoma can trigger a massive hormone surge during surgery, and the weeks of medication are what turn the operation from a gamble into a routine procedure. It feels backwards, sicker before better, and it is temporary: the preparation ends at the operating room door, and most people feel dramatically better within days of the tumor coming out.
Is it really over after the surgery?
For the great majority, yes, and that is what makes this one of the most satisfying diagnoses in hormone medicine. Removing the adrenal gland stops the hormone surges at the source, the episodes simply stop, and most people taper off the blood pressure medicines over the following weeks to months as their own pressure finds its normal level. The two honest footnotes: you will have yearly hormone blood or urine tests afterward, because a small share of these tumors recur, and you will be offered genetic testing, because about a third come from an inherited gene change. A positive genetic result means a surveillance plan for you and possibly screening for close relatives. Neither footnote dims the headline: surgery cures most pheochromocytomas outright.
Three doctors said panic attacks. How does that happen?
It happens because the chemistry is a perfect mimic: a burst of adrenaline produces a racing heart, sweating, trembling, and a sense of doom, which is also the exact description of a panic attack, and panic attacks are common while pheochromocytomas are rare, so the common explanation gets reached for first, second, and third. The clues that were there in hindsight: the splitting headache with the episodes, the episodes waking some people from sleep, and the blood pressure spiking high during attacks, none of which fit panic neatly. Your anger is earned and you are in crowded company; the average delay to this diagnosis is measured in years. The practical use for it now: let it fuel the genetic testing, the good questions, and the recovery, rather than the re-litigating, because the next five weeks are about arriving at surgery steady.
What is the genetic testing for, and what if it is positive?
It looks for the inherited gene changes that cause about a third of pheochromocytomas, and it matters in two directions. For you: a positive result means the tumor is part of a syndrome that can produce other linked tumors over the years, so you would get a surveillance plan, regular scans and hormone checks that catch anything new early and small. For your family: an inherited gene means close relatives, parents, siblings, children, may carry it too, and they would be offered testing and screening, which is how these tumors get found in relatives before they ever cause an episode. A negative result is the commoner outcome and closes the family question. Either way, the testing is offered to nearly everyone with this diagnosis, and the genetics team walks you through it before anything is tested.
What is the surgery actually like, and what is recovery?
Most adrenal removals are keyhole operations: a few small incisions, a hospital stay of a day or three, and a recovery measured in weeks rather than months. The first days after surgery are the watched part, because blood pressure can swing as the body adjusts to life without the extra hormone, but that settles quickly under monitoring. Most people notice the difference fast: the episodes stop, the medicine load shrinks over the following weeks, and the constant background vigilance, the waiting for the next surge, lifts in a way people describe as getting their life back. Full energy takes a few weeks. The yearly hormone test afterward is the long goodbye: a quick blood or urine check that confirms, year after year, that it stays gone.
Is there anything I should avoid in the five weeks before surgery?
A few things, and your team will give you the list, but the big ones are worth knowing now. Take the preparation medication exactly as prescribed and do not stop it early, even feeling rough, because the protection only counts if it is running at surgery. Watch the dizziness: stand up slowly, and mention it if it is limiting, because doses can sometimes be adjusted. Certain medicines are on the avoid list with this tumor, some decongestants, some anti-nausea drugs, some antidepressants, so every new prescription or over-the-counter purchase gets a quick check with the team. And know the emergency rule: an episode with chest pain, severe breathlessness, or confusion is an emergency, not a ride-it-out. Beyond that, the five weeks are for arriving steady: sleep, walks, and the questions list for the surgeon.