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What is Conn's Syndrome?

Tricia Christensen
By
Updated Mar 03, 2024
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Conn's syndrome causes high blood pressure (hypertension) in people who are usually relatively young or between about the ages of 30 and 50. It has alternate names such as hyperaldosteronism, suggesting that it is very different from other conditions causing hypertension. Principally, the second name suggests cause of Conn's syndrome; it tends to be due to high amounts of aldosterone. Knowing this and accurately diagnosing the disease can be very important because it means there’s some likelihood of curing the disease and ending the hypertensive state.

As stated, the cause of Conn's syndrome is high aldosterone levels, and this hormone is produced in the endocrine system by the adrenal glands. There are two possible ways that aldosterone levels dramatically increase. One of these occurs if an adrenal gland has a tumor on it, which is almost always non-cancerous. Another potential reason aldosterone levels would go up is if the two adrenal glands start to increase in size or develop hyperplasia.

On the surface, the main symptom of Conn's syndrome is high blood pressure. Another potential symptom is excessive urination due to poor action of the kidneys. This sign could take a while to develop and isn’t always present at first.

In order to really determine that hyperaldosteronism is present, doctors would have to look for it via blood tests. They may look for general things like elevated calcium levels, but the more important test may be to determine levels of aldosterone. This, plus low readings of another hormone called renin, may make it easier to determine that hypertension is a symptom of Conn's syndrome.

This indication suggests further examination of the adrenal glands to confirm diagnosis. If a tumor is found, one possibility for cure is surgical removal of a gland, since this could normalize aldosterone levels. When adrenal hyperplasia is indicated, cure is not as straightforward and people may need medical follow-up and management for life. Some medicines that tend to be used include spironolactone, which helps to block the action of aldosterone so blood pressure levels can decrease. Blood pressure medicines of other types might be needed too, and careful watch of the kidneys could be an important part of treatment.

In the best case scenario, the person with Conn's syndrome does have a tumor, which is removed, and is thus cured of hypertension. Worst cases include failure to diagnose or difficulty treating due to incurable adrenal hyperplasia. There’s also debate on the degree of rarity this disease represents. Some believe that about 10-20% of all hypertension cases are truly Conn’s. Other medical professionals think Conn's syndrome is extremely rare and they may not frequently test for what could be a potentially curable illness.

The Health Board is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Tricia Christensen
By Tricia Christensen , Writer
With a Literature degree from Sonoma State University and years of experience as a The Health Board contributor, Tricia Christensen is based in Northern California and brings a wealth of knowledge and passion to her writing. Her wide-ranging interests include reading, writing, medicine, art, film, history, politics, ethics, and religion, all of which she incorporates into her informative articles. Tricia is currently working on her first novel.

Discussion Comments

By anon120533 — On Oct 21, 2010

After years of complaints regarding overwhelming fatigue, high BP that spiked at night, insomnia and palpitations my cardiologist suggested my internist test aldosterone and renin.

Surprise -- I was hyperaldosterone. This was after adding drug after drug in an attempt to reduce my BP. Why is it so difficult for physicians to listen and believe women's complaints?

Patients know their bodies better than anyone else, but are often dismissed for a variety of reasons. I am still in the process of testing, but am relieved -- and a bit angry -- to finally have a diagnosis.

By anon113366 — On Sep 24, 2010

I was diagnosed to have Conn syndrome. My right adrenal gland was removed and now remarkably I don't have hypertension and my potassium and calcium levels are fine. My family doc diagnosed it and I am now recovering from the surgery and I feel great. No pills.

Tricia Christensen

Tricia Christensen

Writer

With a Literature degree from Sonoma State University and years of experience as a The Health Board contributor, Tricia...
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