Adrenal Tumors

What is adrenal tumors?

Adrenal tumors are abnormal growths that develop in one or both adrenal glands. The adrenal glands are two small, triangle-shaped organs that sit on top of the kidneys. Despite their small size, these glands produce hormones that help control blood pressure, metabolism, the body’s response to stress, and the balance of salt and water. When a tumor develops in an adrenal gland, it may or may not affect how these hormones are made.

Most adrenal tumors are benign, which means they are not cancer and do not spread to other parts of the body. A common example is an adrenal adenoma, a benign growth that is often discovered by chance when a person has an imaging scan for an unrelated reason. Tumors found this way are sometimes called incidentalomas. Cancerous (malignant) adrenal tumors, such as adrenocortical carcinoma, are rare. Another important type is pheochromocytoma, a tumor that usually starts in the inner part of the adrenal gland and can release excess adrenaline-type hormones; most pheochromocytomas are benign, but they can still cause serious symptoms.

Doctors also divide adrenal tumors into two broad groups based on hormone activity. Functioning tumors produce excess hormones and often cause symptoms. Nonfunctioning tumors do not produce extra hormones and frequently cause no symptoms at all.

Adrenal tumors can occur at any age, but many types become more common as people get older. Some rare inherited conditions raise the risk in younger people and children. Understanding what is adrenal tumors as a diagnosis often begins with a simple distinction: whether the growth is benign or malignant, and whether it is producing hormones.

Symptoms of adrenal tumors

Many adrenal tumors cause no symptoms, especially small, nonfunctioning benign tumors. In these cases, the growth is often found by accident on a CT or MRI scan done for another reason. When adrenal tumors symptoms do appear, they usually depend on which hormone, if any, the tumor is producing, and, less often, on the size of the tumor itself.

Possible symptoms include:

• High blood pressure — this may be constant or come in sudden episodes, and it can be difficult to control with usual medications.
• Episodes of headache, sweating, and a racing or pounding heartbeat — a classic pattern seen with pheochromocytoma, often occurring in spells that last minutes.
• Unexplained weight gain, especially around the abdomen and face, which can occur when a tumor produces too much cortisol (a stress hormone), a condition known as Cushing syndrome.
• Muscle weakness, easy bruising, and thin or fragile skin — also linked to excess cortisol.
• Low potassium levels, muscle cramps, and excessive thirst or urination — these can occur when a tumor produces too much aldosterone, a hormone that controls salt balance (a condition called primary aldosteronism, or Conn syndrome).
• Changes related to sex hormones, such as new facial hair growth or a deeper voice in women, or breast enlargement in men, when a tumor produces excess androgens or estrogens.
• Anxiety, tremor, or a feeling of panic during hormone surges from a pheochromocytoma.
• Abdominal or back pain, a feeling of fullness, or unexplained weight loss — these are less common and more likely with large tumors or, rarely, with adrenal cancer.

Symptoms can also differ by type and stage. Small benign tumors are often silent. Functioning tumors tend to cause hormone-related symptoms early, even when the tumor is small. Adrenal cancers, in contrast, may grow quietly at first and cause pain, a noticeable mass, or general symptoms such as fatigue and weight loss only when they are larger or more advanced. Because many of these symptoms overlap with common, less serious conditions, only proper medical testing can determine the cause.

Causes and risk factors

In most cases, the exact cause of an adrenal tumor is not known. Tumors develop when cells in the adrenal gland acquire changes (mutations) in their DNA that cause them to grow abnormally. In many people, these changes happen by chance and are not inherited.

Known adrenal tumors causes and risk factors include:

• Inherited genetic conditions. A minority of adrenal tumors run in families. Conditions linked to a higher risk include multiple endocrine neoplasia (MEN) syndromes, von Hippel-Lindau disease, neurofibromatosis type 1, Li-Fraumeni syndrome, and hereditary paraganglioma-pheochromocytoma syndromes. People with these conditions may develop tumors at a younger age or in both adrenal glands.
• Age. Benign adrenal adenomas become more common with increasing age. Adrenocortical carcinoma is rare at any age but has been observed both in young children and in adults, most often between roughly 40 and 60 years of age.
• Family history. Having a close relative with an adrenal tumor or a related endocrine (hormone-producing) tumor may modestly increase risk, particularly when an inherited syndrome is present.

It is important to know that most people diagnosed with an adrenal tumor have no identifiable risk factor, and nothing they did caused the tumor. Lifestyle factors such as diet and exercise have not been clearly shown to cause adrenal tumors. If a hereditary syndrome is suspected — for example, in a young patient, in someone with tumors in both glands, or where there is a strong family history — your doctor may recommend genetic counseling and testing.

Diagnosis

Adrenal tumors diagnosis usually involves two parallel questions: is the tumor producing excess hormones, and does it look benign or potentially cancerous on imaging? Doctors combine hormone testing, imaging studies, and sometimes further specialized tests to answer these questions.

Hormone (biochemical) testing

Because functioning tumors change hormone levels in measurable ways, blood and urine tests are a central part of the workup. Depending on the situation, your doctor may order:

• Cortisol testing, often using a low-dose dexamethasone suppression test (a tablet taken at night followed by a morning blood test), late-night salivary cortisol, or 24-hour urine cortisol, to check for excess cortisol production.
• Metanephrines testing in blood (plasma) or 24-hour urine, which measures breakdown products of adrenaline-type hormones and is used to detect pheochromocytoma.
• Aldosterone and renin levels, especially in people with high blood pressure or low potassium, to check for primary aldosteronism.
• Sex hormone and steroid precursor levels in selected cases, particularly when adrenal cancer is a concern.

Imaging studies

Imaging helps determine the tumor’s size, appearance, and behavior:

• CT scan (computed tomography) is often the first and most informative test. Certain features on CT — such as the tumor’s density and how it handles contrast dye — help doctors judge whether a tumor is likely benign.
• MRI (magnetic resonance imaging) may be used as an alternative or an addition, particularly in pregnant patients, children, or when CT findings are unclear.
• Nuclear medicine scans, such as PET scans or specialized scans for pheochromocytoma, may be used in selected cases to look for cancer spread or additional tumors.

Size and follow-up criteria

Tumor size matters. Small tumors (generally under about 4 centimeters) with a typical benign appearance are usually considered low risk. Larger tumors, tumors with irregular or suspicious imaging features, and tumors that grow over time raise more concern for cancer and are evaluated more aggressively. For tumors found incidentally, doctors often recommend hormone testing and, in some cases, repeat imaging after an interval to confirm the tumor is stable.

Biopsy — used cautiously

Unlike many other tumors, adrenal tumors are usually not biopsied. A biopsy (taking a tissue sample with a needle) can be risky if the tumor is a pheochromocytoma, because it may trigger a dangerous hormone surge, and it is often unreliable for telling a benign adrenal tumor from adrenal cancer. Biopsy is generally reserved for situations where doctors suspect the adrenal mass is a spread (metastasis) from a cancer elsewhere in the body, and only after pheochromocytoma has been ruled out.

Treatment options

Adrenal tumors treatment depends on the type of tumor, its size, whether it produces hormones, and whether it is benign or malignant. There is no single approach that fits everyone, and your care team will tailor recommendations to your situation.

Watchful waiting (active surveillance)

Many small, nonfunctioning, benign-appearing tumors do not need any immediate treatment. Instead, doctors may recommend periodic monitoring with imaging and hormone tests to make sure the tumor is not growing or beginning to produce hormones. In many cases, these tumors remain stable for years and never require intervention.

Medications

Medications are used in several situations. For functioning tumors, drugs can help control the effects of excess hormones — for example, medications that block aldosterone in primary aldosteronism, or drugs that control cortisol excess when surgery is not immediately possible. Before surgery for a pheochromocytoma, patients typically take medications called alpha-blockers for a period of time to control blood pressure and reduce the risk of dangerous blood pressure swings during the operation. In adrenal cancer, a drug called mitotane, which specifically targets adrenal tissue, may be used after surgery or for disease that cannot be fully removed, sometimes together with chemotherapy.

Surgery

Surgical removal of the affected adrenal gland, called adrenalectomy, is the main treatment for functioning tumors that cause significant hormone problems, for pheochromocytomas, for tumors that are large or growing, and for suspected or confirmed adrenal cancer. Many benign tumors can be removed using minimally invasive (laparoscopic) surgery, which involves small incisions and often a shorter recovery. Larger tumors or suspected cancers may require open surgery so the tumor can be removed completely and intact. Because people have two adrenal glands, the remaining gland can usually take over hormone production after one gland is removed, although some patients need temporary or, less commonly, long-term hormone replacement.

Treatment for adrenal cancer

When an adrenal tumor is malignant, treatment is usually coordinated by a multidisciplinary team that may include endocrinologists (hormone specialists), surgeons, and cancer specialists. Complete surgical removal offers the best chance of controlling the disease when the cancer has not spread. Additional treatments — such as mitotane, chemotherapy, or radiation therapy in selected cases — may be recommended depending on the stage and features of the cancer. Systemic cancer treatment is typically planned and supervised by specialists in a Medical Oncology Department, working alongside the surgical and endocrine teams. At hospital groups such as Acibadem, adrenal tumors are generally managed in this multidisciplinary way, combining endocrinology, surgery, and oncology expertise as needed.

Living with adrenal tumors / outlook

The outlook for people with adrenal tumors varies widely by type. For the large majority of patients — those with small, benign, nonfunctioning tumors — the long-term outlook is generally very good, and many people need only periodic checkups. Benign functioning tumors also often have a favorable outlook once the hormone excess is treated, though some effects of long-standing hormone overproduction, such as high blood pressure or changes in bone strength, may take time to improve and sometimes require ongoing management.

After surgery to remove an adrenal gland, some patients need cortisol replacement for a period while the remaining gland recovers its function. Your doctor will guide you on medication doses and on what to do during illness or stress, when the body normally needs more cortisol. People who have had a pheochromocytoma usually need long-term follow-up, because these tumors can occasionally recur or, in people with inherited syndromes, appear on the other side.

Adrenal cancer is a more serious diagnosis. Outcomes depend heavily on whether the cancer can be completely removed and whether it has spread. Some patients achieve long-term control after surgery, while others need ongoing treatment. Doctors avoid making guarantees, because each person’s disease behaves differently; honest, regular conversations with your care team about goals and expectations are an important part of care.

Living well with an adrenal tumor often includes keeping follow-up appointments, taking medications as prescribed, monitoring blood pressure at home if advised, and telling your doctors about all your medications and any new symptoms. Emotional support matters too — a tumor diagnosis, even a benign one, can cause significant anxiety, and counseling or patient support groups can help.

Frequently asked questions

What is an adrenal tumor in simple terms?

An adrenal tumor is a growth in one of the adrenal glands, the small hormone-producing organs on top of the kidneys. Most are benign (not cancer) and many cause no symptoms. Some tumors produce excess hormones, which can cause problems such as high blood pressure or weight changes, while a small minority are cancerous and need more intensive treatment.

Are adrenal tumors usually cancer?

No. The great majority of adrenal tumors are benign, and many are discovered by chance on scans done for other reasons. Adrenal cancer (adrenocortical carcinoma) is rare. Doctors use tumor size, appearance on imaging, and hormone tests to judge how likely a tumor is to be cancerous, and they monitor or remove tumors that raise concern.

What are the most common adrenal tumors symptoms?

Many adrenal tumors cause no symptoms at all. When symptoms occur, they usually come from excess hormones and can include high blood pressure, episodes of headache, sweating and rapid heartbeat, unexplained weight gain, muscle weakness, easy bruising, or low potassium with cramps and excessive thirst. Large tumors can occasionally cause abdominal or back pain. Because these symptoms have many possible causes, testing is needed to find the reason.

Can adrenal tumors heal or go away on their own?

Benign adrenal tumors do not usually disappear on their own, but many remain small and stable and never cause problems, which is why doctors often recommend monitoring rather than immediate treatment. Tumors that produce excess hormones or that grow generally need active treatment, most often surgery. Cancerous tumors do not resolve without treatment and require prompt specialist care.

How serious is an adrenal tumor?

Seriousness depends on the type. A small, nonfunctioning benign tumor is often not serious and may only need periodic checkups. Functioning tumors can cause significant health problems — such as poorly controlled blood pressure or cortisol excess — but these are often treatable, frequently with surgery. Adrenal cancer is serious and requires coordinated treatment, and its outlook depends largely on how early it is found and whether it can be fully removed.

What is recovery like after adrenal tumor surgery?

Recovery depends on the type of operation. After minimally invasive (laparoscopic) adrenal surgery, many people leave the hospital within a few days and return to normal activities within a few weeks, though timelines vary. Open surgery for larger tumors typically involves a longer recovery. Some patients need temporary cortisol replacement while the remaining adrenal gland adjusts, and your care team will monitor hormone levels and blood pressure during follow-up.

Do adrenal tumors run in families?

Most adrenal tumors are not inherited. However, a minority are linked to genetic syndromes such as multiple endocrine neoplasia, von Hippel-Lindau disease, or hereditary pheochromocytoma syndromes. Doctors may suggest genetic counseling if you are diagnosed at a young age, have tumors in both glands, or have a family history of adrenal or related endocrine tumors.

When to see a doctor

Make an appointment with a doctor if you have persistent symptoms that could relate to adrenal hormone excess, such as high blood pressure that is hard to control, unexplained weight gain around the face and abdomen, new muscle weakness or easy bruising, unusual thirst and frequent urination, or ongoing abdominal or back discomfort. Also seek evaluation if a scan done for another reason showed a growth on your adrenal gland, even if you feel well — incidentally found tumors should always be assessed with hormone testing and appropriate follow-up.

Seek urgent medical care if you experience any of the following red-flag warning signs:

• Sudden, severe episodes of headache, heavy sweating, and a pounding or racing heartbeat, especially with very high blood pressure — this pattern can signal a pheochromocytoma crisis.
• Blood pressure readings that are extremely high, particularly with chest pain, shortness of breath, severe headache, or vision changes.
• Fainting, severe dizziness, or an irregular heartbeat.
• Severe muscle weakness or paralysis-like symptoms, which can occur with dangerously low potassium levels.
• Severe abdominal or back pain that comes on suddenly, especially with a known adrenal mass.
• In people who have had adrenal surgery or take cortisol replacement: vomiting, fever, confusion, or extreme weakness, which may indicate a dangerous shortage of cortisol (adrenal crisis) and requires emergency treatment.

Early evaluation of concerning symptoms allows doctors to identify hormone problems and tumors sooner, when they are usually easier to treat. If you are unsure whether a symptom is urgent, it is safer to seek medical advice promptly.