Adenoma in Adrenal Gland: Causes, Symptoms, Diagnosis and Treatment

An adenoma in the adrenal gland is a usually noncancerous growth that is often found by chance during imaging tests. Many cause no symptoms, but some make hormones and can affect blood pressure, weight, or energy levels.

Overview

An adenoma in adrenal gland is a benign growth that develops in one of the two small adrenal glands sitting above the kidneys. In many people, it is discovered during a scan done for another reason, such as back pain, abdominal discomfort, or a health check that includes imaging of the abdomen.

Although the word “tumor” can sound worrying, an adrenal adenoma is often not dangerous. The key question is whether it is simply sitting there quietly or whether it is producing hormones that the body does not need in excess. That difference shapes the next steps in evaluation and treatment.

For international patients, the practical challenge is often not just learning the diagnosis but understanding what happens next: which hormone tests are needed, whether the scan needs to be repeated, and if surgery is truly necessary. A careful, stepwise approach helps separate low-risk adenomas from those that deserve closer attention.

Symptoms

Many adrenal adenomas do not cause any symptoms at all. In those cases, a person may feel completely well, and the growth is found incidentally on an ultrasound, CT scan, or MRI. This is one reason adrenal adenomas are sometimes called “incidentalomas.”

When symptoms do appear, they often reflect hormone production rather than the mass itself. A hormone-producing adenoma may lead to high blood pressure, weight gain around the trunk, easy bruising, muscle weakness, palpitations, anxiety, or changes in blood sugar. Some people notice headaches, sweating, or low potassium levels if the tumor affects hormones involved in blood pressure control.

Because these signs can overlap with many common conditions, they are not enough on their own to diagnose an adrenal adenoma. Instead, doctors look at the full picture: symptoms, blood tests, and imaging results together.

Causes & Risk Factors

The exact cause of an adrenal adenoma is not always clear. In many cases, it appears to arise from a small cluster of adrenal cells that begin to grow more than usual without becoming cancerous. Most are discovered in adults and become more common with age.

Some adenomas are linked to hormone imbalance, although the trigger may still be uncertain. A minority produce cortisol, aldosterone, or, less commonly, other hormones. When that happens, the adenoma can affect blood pressure, metabolism, bone health, or the body’s stress response.

Risk factors are not always modifiable. Having certain endocrine conditions, being older, or undergoing imaging for another medical issue may increase the chance of detection. Family history and genetic syndromes can matter in selected cases, but many people with adrenal adenomas have no clear risk factor at all.

• Older age
• Incidental discovery during imaging
• Hormone-related adrenal conditions
• Selected inherited endocrine syndromes

Diagnosis

Diagnosis usually begins with imaging. A CT scan or MRI helps the doctor assess the size, shape, and appearance of the lesion. Radiologists look for features that suggest a benign adenoma, such as a smooth outline and imaging characteristics typical of fat-rich tissue.

Imaging alone is not always enough. Doctors also check whether the adenoma is producing hormones, even when symptoms are subtle. This may involve blood or urine tests to assess cortisol, aldosterone, adrenal androgens, or markers related to catecholamine-producing tumors when appropriate.

The result is a two-part decision: is it likely benign, and is it hormonally active? If the answer to both is reassuring, the doctor may recommend observation rather than treatment. If the findings are unclear, repeat imaging or referral to an endocrinologist may be suggested.

For patients traveling from another country, bringing prior scans and lab results can be very helpful. Comparing older images with new ones may prevent unnecessary repeat tests and gives the specialist a clearer sense of whether the lesion has changed over time.

Treatment Options

Treatment depends on the adenoma’s behavior, not just its presence. A small, nonfunctioning adenoma with benign imaging features is often monitored over time. In that situation, the goal is to confirm stability and avoid unnecessary procedures.

If the adenoma produces hormones or shows concerning imaging features, surgery may be recommended. In many cases, the operation is minimally invasive and performed through laparoscopic or robotic techniques, depending on the tumor’s size, location, and the surgeon’s assessment. The main aim is to remove the source of hormone excess or eliminate the risk posed by a suspicious lesion.

When hormone excess has already affected blood pressure, blood sugar, or potassium levels, treatment may also include medical management before or after surgery. This can help stabilize the body and make recovery safer. The plan is individualized, especially for people who are coordinating care across borders and need clear instructions for follow-up once they return home.

Prevention & Self-care

There is no proven way to prevent every adrenal adenoma, because many arise without a known cause. Still, people can support their overall endocrine health by keeping regular medical appointments, managing blood pressure, and addressing unexplained weight changes, fatigue, or muscle weakness promptly.

Self-care is especially important for those who are being monitored rather than treated right away. Keeping a record of symptoms, blood pressure readings, and test results can make follow-up visits more useful. If a doctor recommends repeat imaging or hormone tests, staying on schedule matters even when the person feels well.

Patients who have already traveled for evaluation may also benefit from organizing documents before leaving the treatment center: scan reports, lab values, medication lists, and a written follow-up plan. That practical preparation helps a local doctor continue care smoothly after return.

• Attend follow-up appointments as advised
• Monitor blood pressure if recommended
• Report new headaches, weakness, or palpitations
• Keep copies of imaging and lab reports

When to See a Doctor

A doctor should evaluate any adrenal mass found on imaging, even if it was discovered by accident. The main reason is to determine whether it is benign and whether it is making hormones that could affect long-term health.

Medical review is especially important if there is difficult-to-control high blood pressure, low potassium, unexplained weight gain, new diabetes, muscle weakness, or repeated episodes of headache and sweating. These symptoms may suggest that the adrenal gland is influencing the body more than expected.

Urgent assessment is not usually needed for a stable, incidental adenoma that has already been reviewed by a specialist. However, new or worsening symptoms, rapid changes in blood pressure, or a newly discovered adrenal mass should be discussed promptly. At Acibadem Health Point, multidisciplinary specialists and JCI-accredited hospitals support international patients with diagnosis and treatment planning for adrenal conditions.

Living With an Adrenal Adenoma

For many people, learning they have an adrenal adenoma is the start of a period of clarification rather than alarm. Once the lesion has been assessed, the next step is often simply monitoring, especially when it is small, benign-appearing, and not producing hormones.

Living with follow-up care can feel different when the patient is abroad or returning home after testing. In that setting, a clear summary from the treating team is valuable: what was found, why treatment is or is not needed, and what specific signs should trigger a return visit. Good communication reduces uncertainty and helps the patient stay in control of the plan.

When the adenoma does require treatment, outcomes are often favorable because the condition is commonly identified before it causes major problems. A thoughtful evaluation by endocrinology, radiology, and surgery teams helps match the treatment to the individual rather than to the scan alone.

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.