Adrenal Adenoma: Causes, Symptoms, Diagnosis and Treatment

An adrenal adenoma is a noncancerous growth in one of the adrenal glands, and many are found by chance during imaging done for another reason. Some cause no symptoms, while others may produce hormones that affect blood pressure, weight, or energy levels.

Overview

An adrenal adenoma is a benign growth that develops in one of the adrenal glands, the small hormone-producing glands that sit above each kidney. Many adrenal adenomas are discovered incidentally on a scan done for back pain, abdominal pain, kidney stones, or another unrelated issue, which is why the term adrenal incidentaloma is often used.

Finding an adrenal adenoma does not automatically mean there is a serious problem. The key question is not only whether the growth looks benign on imaging, but also whether it is making hormones that may influence the body. That distinction shapes the entire care plan, from simple observation to medication or surgery.

For patients who travel for evaluation, the usual first step is a careful review of prior scans and lab results, because the right decision depends on the full picture rather than on a single image. A specialist may recommend additional hormone testing, repeat imaging, or both before deciding on treatment.

Symptoms

Many adrenal adenomas cause no symptoms at all. In those cases, the person may feel completely well, and the lesion is only noticed on imaging. This is especially common when the adenoma does not produce hormones.

When an adrenal adenoma is hormonally active, symptoms depend on which hormone is involved. Excess cortisol can lead to weight gain around the abdomen, easy bruising, muscle weakness, mood changes, or poorly controlled diabetes. Excess aldosterone may cause high blood pressure and low potassium, which can bring on muscle cramps, weakness, or palpitations.

Some people also notice less specific changes such as fatigue, sleep disturbance, or difficulty regulating blood pressure. These symptoms are not unique to adrenal adenoma, which is why laboratory testing is important before any conclusions are drawn.

• High blood pressure that is difficult to control
• Unexplained weight gain or body shape changes
• Muscle weakness or cramps
• Easy bruising or thin skin
• Low potassium on blood tests

Causes & Risk Factors

The exact cause of an adrenal adenoma is often unknown. In many people it appears to arise from ordinary changes in adrenal tissue over time rather than from a single identifiable trigger. These tumors are usually slow growing and noncancerous.

Risk increases with age, and adrenal adenomas are more commonly found in adults than in children. Some are associated with hormone imbalance or with certain inherited conditions, but many occur in people with no clear family history or other risk factor.

Possible factors that may be considered during evaluation include:

• Older age
• History of high blood pressure or diabetes
• Unexpected hormone-related symptoms
• Prior imaging that shows the lesion has changed over time
• Personal or family history of endocrine disorders

Because the lesion is often found unexpectedly, risk assessment usually focuses less on what caused it and more on whether it behaves like a harmless, stable adenoma or a tumor that needs closer attention.

Diagnosis

Diagnosis usually begins with imaging and hormone testing. A doctor may first review a CT scan or MRI to examine the size, shape, and density of the adrenal mass. Certain imaging features can suggest that a lesion is likely to be benign, but imaging alone is not always enough to determine whether it is functioning.

Hormone evaluation is a central part of the workup. Depending on the situation, this may include blood or urine tests to look for excess cortisol, aldosterone, or catecholamines. The aim is to identify whether the adenoma is affecting the body even when the person has few symptoms.

In some cases, repeat imaging is recommended after a period of observation to confirm stability. If the mass is large, has unusual features, or shows growth, a specialist may advise additional testing or discussion of surgery. A clear diagnosis helps avoid both unnecessary procedures and delayed treatment.

Treatment Options

Treatment is individualized. A small, benign-appearing adrenal adenoma that is not producing hormones may only need periodic monitoring with imaging and lab tests. This approach is often appropriate when the lesion is stable and there are no concerning symptoms.

If the adenoma is producing hormones or causing health problems such as uncontrolled hypertension or cortisol excess, treatment may be recommended. Surgery to remove the affected adrenal gland or tumor is often considered when the benefits outweigh the risks. The exact approach depends on the tumor’s features, the patient’s overall health, and whether one or both glands are involved.

When surgery is needed, care is typically planned by an endocrine or surgical team, sometimes with anesthesiology, radiology, and internal medicine input. For international patients, this team-based planning can help organize testing, the procedure itself, and follow-up before the person returns home.

After treatment, hormone levels may need to be monitored, especially if the adenoma had been making cortisol or aldosterone. Some people also require temporary medication adjustments while the body rebalances after surgery.

Prevention & Self-care

There is no proven way to prevent adrenal adenoma. Since many cases arise without a clear cause, prevention is less about avoiding the tumor and more about supporting overall endocrine health and following up appropriately when a lesion is found.

People advised to monitor an adrenal adenoma should keep scheduled appointments and bring prior imaging or laboratory reports to each visit. This is especially important for patients receiving care in another country, where coordinated records make it easier to compare scans and avoid repeating tests unnecessarily.

Practical self-care may include:

• Tracking blood pressure at home if recommended
• Noting new symptoms such as weakness, headaches, or weight changes
• Taking prescribed medications as directed
• Sharing all supplements and over-the-counter medicines with the doctor
• Returning for repeat testing on schedule

If a hormonally active adenoma has been treated, lifestyle measures that support recovery—such as balanced nutrition, gentle activity as advised, and rest—can help, but they do not replace medical follow-up.

When to See a Doctor

Any newly discovered adrenal mass should be reviewed by a doctor, even if it was found incidentally and the person feels well. An endocrinologist or other specialist can determine whether the finding is likely to be harmless or whether hormone testing and follow-up are needed.

Prompt medical review is especially important if there is persistent high blood pressure, low potassium, unexplained weight gain, muscle weakness, palpitations, or a rapidly changing clinical picture. These signs do not prove the adenoma is active, but they do justify a closer look.

Patients who are considering travel for care may benefit from bringing scan images, hormone results, and a medication list in advance so the first consultation can be focused and efficient. Acibadem Health Point’s multidisciplinary specialists and JCI-accredited hospitals diagnose and treat adrenal adenoma for international patients, with evaluation and follow-up planned around the patient’s situation.

Outlook

The outlook for adrenal adenoma is usually good. Many are benign, remain stable for years, and never require treatment beyond observation. When the lesion is hormonally active, effective treatment can often improve symptoms and reduce the long-term strain on the heart, kidneys, and metabolism.

The most important part of care is accurate classification: benign or suspicious, nonfunctioning or hormone-producing. Once that is clear, the care plan can be tailored to the individual rather than applied as a one-size-fits-all approach.

Patients do best when they stay engaged with follow-up, ask for explanations in plain language, and keep copies of their records—especially if they may need care across borders or from more than one specialist.

Frequently asked questions

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.