How Adrenal Cancer Is Diagnosed

Adrenal cancer diagnosis involves a series of tests to identify abnormal growths on the adrenal glands, which are small hormone-producing organs located above your kidneys. Doctors typically start with a physical exam and medical history, followed by blood and urine tests to check hormone levels. Imaging scans like CT or MRI help locate tumors, and sometimes a biopsy is needed to confirm if the growth is cancerous.

What is How Adrenal Cancer Is Diagnosed?

Adrenal cancer diagnosis is the process of identifying abnormal, cancerous growths on your adrenal glands, which are small hormone-producing organs located above each kidney. Because adrenal cancer (adrenocortical carcinoma) is rare and its symptoms can be vague, a thorough diagnostic approach is crucial to distinguish it from benign (non-cancerous) conditions and ensure timely treatment.

Your adrenal glands play a vital role in your body, producing hormones like cortisol, aldosterone, and sex hormones (androgens and estrogens). These hormones regulate many bodily functions, including metabolism, blood pressure, and your body's response to stress. When cancer develops in these glands, it can either produce excess hormones, leading to specific symptoms, or grow large enough to cause symptoms by pressing on nearby organs. Adrenal cancer, also known as adrenocortical carcinoma (ACC), is a very rare but aggressive type of cancer. The diagnostic process aims to determine if a growth on the adrenal gland is cancerous, whether it is producing hormones, and if it has spread to other parts of the body. Early and accurate diagnosis is essential for effective management and can significantly impact treatment outcomes.

Symptoms

Symptoms of adrenal cancer often arise from excess hormone production or the tumor's physical size pressing on nearby organs. Common signs can include unexplained weight gain or loss, muscle weakness, high blood pressure (hypertension), and changes in body hair or menstrual cycles. These symptoms can be subtle and vary widely, making diagnosis challenging.

Many symptoms of adrenal cancer are caused by the overproduction of hormones by the cancerous adrenal gland. For example, excess cortisol can lead to a condition called Cushing's syndrome. This is characterized by weight gain, especially around the abdomen and face (often called a 'moon face'), muscle weakness, easy bruising, and high blood pressure (hypertension). Too much aldosterone, another adrenal hormone, can also cause high blood pressure and low potassium levels in the blood. In women, excess male hormones (androgens) produced by an adrenal tumor can lead to increased facial and body hair (hirsutism), a deepening voice, and irregular menstrual periods. In men, excess female hormones (estrogens) might cause breast enlargement (gynecomastia) and decreased sex drive. If the tumor does not produce excess hormones, symptoms may only appear when the tumor grows large enough to cause pain or pressure in the abdomen or back, or a feeling of fullness.

Causes & risk factors

The exact causes of most adrenal cancer (adrenocortical carcinoma) cases are largely unknown, and most occur without a clear reason. However, certain rare genetic conditions can increase your risk. These include Li-Fraumeni syndrome, Multiple Endocrine Neoplasia type 1 (MEN1), Beckwith-Wiedemann syndrome, and familial adenomatous polyposis (FAP).

Adrenal cancer is considered very rare, affecting about 1 to 2 people per million each year. While most cases are sporadic, meaning they happen by chance without a clear inherited link, a small percentage are associated with inherited genetic syndromes. These syndromes involve specific gene mutations that increase a person's susceptibility to various cancers, including adrenal cancer. For instance, Li-Fraumeni syndrome is a rare inherited disorder that significantly increases the risk of developing several types of cancer, often at a young age, including adrenal cancer. Another condition, Multiple Endocrine Neoplasia type 1 (MEN1), is a genetic disorder that causes tumors in endocrine glands, which can include the adrenal glands. It's important to note that having these risk factors does not guarantee you will develop adrenal cancer, but it does mean your doctor might recommend closer monitoring if you have a family history of these conditions.

How it's diagnosed

Diagnosing adrenal cancer typically begins with a thorough physical exam and a review of your medical history, focusing on symptoms related to hormone imbalances or abdominal discomfort. This is followed by specialized blood and urine tests to measure hormone levels, and then imaging scans like CT, MRI, or PET to locate and characterize any adrenal masses. A biopsy may be performed if imaging is inconclusive.

The diagnostic process for adrenal cancer is comprehensive and often involves several steps to accurately identify the condition: **Physical Exam and Medical History:** Your doctor will start by asking about your symptoms, your overall medical history, and any family history of genetic conditions linked to adrenal cancer. They will perform a physical exam, checking for signs like high blood pressure, muscle weakness, easy bruising, or changes in body hair, which can suggest hormone imbalances associated with adrenal tumors. **Blood and Urine Tests:** These tests are crucial for checking hormone levels. Blood tests can measure levels of cortisol, aldosterone, and sex hormones (androgens and estrogens). A 24-hour urine collection is often used to measure levels of hormones and their breakdown products (metabolites) over a full day. High levels of certain hormones, such as cortisol or androgens, can strongly point towards a functional adrenal tumor, meaning it is actively producing hormones. **Imaging Tests:** If hormone tests suggest a problem or if a mass is suspected, imaging scans are used to visualize the adrenal glands and identify any tumors. A computed tomography (CT) scan uses X-rays to create detailed cross-sectional images of your abdomen, helping to locate and assess the size of an adrenal mass. Magnetic resonance imaging (MRI) uses strong magnetic fields and radio waves to produce detailed images, which can be particularly useful for distinguishing between benign (non-cancerous) and cancerous growths based on their characteristics. Positron emission tomography (PET) scans, often combined with CT (PET-CT), use a radioactive tracer to highlight areas of increased metabolic activity, which can indicate cancer and help detect if it has spread. **Biopsy:** In some cases, if imaging and hormone tests are not conclusive, a biopsy may be performed. This involves taking a small tissue sample from the adrenal mass, usually guided by imaging like a CT scan, and examining it under a microscope to confirm if cancer cells are present. However, biopsies of adrenal masses are sometimes avoided if there's a strong suspicion of adrenal cancer, as there's a small risk of spreading cancer cells or causing bleeding. Your doctor will carefully weigh the risks and benefits of a biopsy for your specific situation.

Treatment options

Treatment for adrenal cancer primarily involves surgery to remove the tumor, especially when the cancer is localized. Depending on the stage and spread of the cancer, other treatments may include radiation therapy, chemotherapy, or medications to block excess hormone production. Your treatment plan will be tailored by a team of specialists based on your specific condition.

The primary treatment for adrenal cancer, particularly if it's caught early and hasn't spread beyond the adrenal gland (localized), is surgery. This procedure, called an adrenalectomy, involves surgically removing the affected adrenal gland and any surrounding tissue that might contain cancer cells. Complete surgical removal offers the best chance for a cure and improved long-term outcomes. If the cancer has spread to other parts of the body (metastasized) or cannot be fully removed by surgery, other treatments may be considered. Radiation therapy uses high-energy X-rays to kill cancer cells or shrink tumors, often used to manage symptoms or prevent recurrence in specific areas. Chemotherapy uses powerful drugs, administered orally or intravenously, to destroy cancer cells throughout the body. Additionally, medications may be prescribed to manage symptoms caused by excess hormone production, such as drugs to lower cortisol levels or block the effects of other hormones. Your healthcare team, which may include oncologists, endocrinologists, and surgeons, will discuss the most appropriate treatment options for your individual situation.

Recovery & outlook

The recovery and outlook for adrenal cancer vary significantly depending on the cancer's stage at diagnosis, the success of treatment, and individual factors. Early diagnosis and complete surgical removal generally lead to a better prognosis. Regular follow-up care, including imaging and hormone tests, is crucial to monitor for recurrence and manage any long-term effects.

Adrenal cancer is a challenging disease, and the outlook is generally better when it is diagnosed at an early stage, before it has spread beyond the adrenal gland. If the tumor can be completely removed surgically, the chances of long-term survival improve significantly. However, even after successful surgery, adrenal cancer has a tendency to recur, meaning it can come back. Recovery after treatment, especially surgery, involves a period of healing and rehabilitation. You may need hormone replacement therapy if both adrenal glands are removed or if the remaining gland doesn't produce enough hormones. This is vital for maintaining your body's essential functions. Regular follow-up appointments with your medical team are essential. These appointments typically include physical exams, blood tests to check hormone levels, and imaging scans to monitor for any signs of cancer recurrence. Your doctor will provide personalized information about your specific prognosis and what to expect during recovery and long-term management.

When to see a doctor

You should see a doctor if you experience persistent or new symptoms that could indicate an adrenal problem, such as unexplained weight changes, new high blood pressure, muscle weakness, or unusual changes in body hair or menstrual cycles. While these symptoms can have many causes, it's important to get them checked, especially if they are worsening or concerning.

It's important to pay attention to your body and seek medical advice if you notice any unusual or persistent changes. For example, if you develop new or worsening high blood pressure (hypertension) that is difficult to control with standard medications, or if you experience unexplained fatigue, muscle weakness, or changes in your body's appearance like sudden weight gain or loss, these warrant a visit to your doctor. Women should also be aware of changes like increased facial hair growth (hirsutism), deepening of the voice, or irregular menstrual periods. Men might notice breast enlargement (gynecomastia) or decreased libido. While these symptoms are often due to less serious conditions, discussing them with your healthcare provider allows for proper evaluation and, if necessary, early diagnosis of conditions like adrenal cancer. Early detection can significantly improve treatment outcomes and your overall health.

Frequently asked questions

Is adrenal cancer common?

No, adrenal cancer (adrenocortical carcinoma) is very rare. It affects approximately 1 to 2 people per million each year, making it one of the less common types of cancer.

Can adrenal cancer be benign (non-cancerous)?

Yes, many growths found on the adrenal glands are benign (non-cancerous) adenomas, not cancer. Distinguishing between benign and cancerous growths is a key part of the diagnostic process, often relying on imaging characteristics and hormone tests.

What is the main test for adrenal cancer?

There isn't one single 'main' test, but a combination of blood and urine tests to check hormone levels, along with imaging scans like CT or MRI to visualize the adrenal glands, are the primary diagnostic tools used to detect adrenal cancer.

Do all adrenal tumors produce hormones?

No, not all adrenal tumors produce hormones. Some adrenal cancers are 'functional,' meaning they produce excess hormones, leading to specific symptoms. Others are 'non-functional' and may only cause symptoms when they grow large enough to press on nearby organs.

How long does it take to diagnose adrenal cancer?

The time it takes to diagnose adrenal cancer can vary widely. It often involves multiple tests over several weeks or even months, especially because symptoms can be vague and the condition is rare, requiring specialized evaluation by different medical professionals.

What is the difference between an adrenal adenoma and adrenal cancer?

An adrenal adenoma is a common, usually benign (non-cancerous) tumor of the adrenal gland that often doesn't cause symptoms. Adrenal cancer (adrenocortical carcinoma) is a rare, malignant tumor that can grow aggressively and spread. Diagnostic tests aim to differentiate between these two types of growths.

Sources

• MedlinePlus — How Adrenal Cancer Is Diagnosed
• Mayo Clinic — How Adrenal Cancer Is Diagnosed
• Cochrane Library — How Adrenal Cancer Is Diagnosed