16848 Carotid Body Tumors

Overview

A carotid body tumor is a rare growth that forms in the carotid body, a small cluster of cells located in the neck at the point where the carotid artery divides. These cells help sense oxygen levels in the blood, and in rare cases they can grow into a tumor. Most of these tumors are not cancer and they tend to grow very slowly.

This is a rare condition. It accounts for a very small fraction of all head and neck tumors and is usually not cancer.

Carotid body tumors can affect people of any age, and they tend to be diagnosed most often in adults between their 30s and 50s. They are slightly more common in women. In children, they are extremely rare.

Symptoms

Common symptoms

• A slow-growing, often painless lump in the side of the neck
• A feeling of pulsing in the neck
• Hoarseness or voice changes
• Difficulty swallowing
• A ringing sound in the ear (tinnitus)
• Dizziness

Symptoms in children

• In very rare cases, a neck lump may be noticed during a routine check-up.
• The child might have voice changes, swallowing trouble, or ear ringing if the tumor presses on nearby structures.

Symptoms in older adults

• The tumor may be larger at diagnosis and can press on nearby nerves, causing hoarseness, swallowing difficulty, or shoulder weakness.
• Some older adults have no symptoms and the tumor is discovered during an imaging scan for another reason.

Causes

Main causes

• The exact cause is often unknown.
• Some cases are inherited, meaning a gene change can increase the chance of developing this type of tumor.
• Rarely, long-term low oxygen levels in the body – such as living at high altitude – may play a role.

Risk factors

• Family history of carotid body tumors or related growths called paragangliomas
• Inherited gene changes that affect certain body functions
• Long-term residence at high altitude

When to see a doctor

See a doctor urgently if:

• You notice a new lump in your neck, especially if it is growing.
• You have new voice changes, trouble swallowing, or new neck pain.

Book a routine appointment if:

• You have a family history of carotid body tumors or paragangliomas and want to discuss genetic testing and screening.

Diagnosis

A doctor will start by asking about your symptoms and medical history and examining your neck. If a carotid body tumor is suspected, imaging tests are used to confirm the diagnosis and see the size and location of the tumor. A biopsy (taking a small sample of tissue) is usually avoided because the tumor sits close to important blood vessels.

Tests that may be done

• Ultrasound of the neck
• Magnetic resonance imaging (MRI)
• Computed tomography (CT) scan
• Angiography – a special X-ray that looks at blood vessels
• Blood or urine tests to check for hormone activity in some cases

What to expect at your appointment

Imaging tests are non-invasive and generally painless. You may be asked not to eat for a few hours before certain scans or before contrast dye is used. The doctor will explain each step and what the results might mean. It may take a few days to receive the results, and you may be referred to a specialist in head and neck tumors.

Treatment

Treatment depends on the size of the tumor, whether it is causing symptoms, whether it makes extra hormones, your age, and your overall health. Many carotid body tumors grow slowly, and some can be carefully monitored. Surgery is the main treatment for tumors that are growing or causing symptoms. Other options include radiation therapy or, less commonly, procedures to block the tumor's blood supply. Your healthcare team will discuss the best approach for your specific situation.

Self-care at home

• Keep a record of any changes in your neck and report them to your doctor.
• Attend all follow-up appointments and imaging scans as recommended.
• Take care of your overall health with regular physical activity and a balanced diet.
• If you have high blood pressure, check it regularly and follow your doctor's advice.

Medical treatments

Medical treatment for carotid body tumors generally focuses on controlling the tumor and managing symptoms. This may include careful observation with regular imaging scans, radiation therapy to shrink or slow the tumor, or embolization – a procedure that reduces blood flow to the tumor before surgery. If the tumor produces extra hormone-like substances, your specialist may prescribe medication to control the effects. There is no standard drug therapy that cures the tumor itself.

When is surgery considered?

Surgical removal is often the preferred treatment for tumors that are growing, causing symptoms, or suspected to be malignant. In many cases, surgery can completely remove the tumor. Your surgeon will explain the risks and benefits based on the size and location of your tumor and your general health.

Living with this condition

Living with a carotid body tumor is often about routine monitoring and listening to your body. After treatment, you will have regular checkups to make sure the tumor has not returned. Many people live full, active lives without long-term problems.

Lifestyle tips

• If you smoke, talk to your healthcare team about quitting – this can improve your overall health.
• Stay active within your comfort level; gentle walking is usually safe and beneficial.
• Manage stress with relaxation exercises, hobbies, or talking to someone you trust.

Diet and exercise

Eat a balanced diet rich in fruits, vegetables, and whole grains. Regular, gentle exercise such as walking can help you feel well and support your heart and blood vessel health. Ask your doctor what level of activity is safe for you.

Mental health and emotional wellbeing

A diagnosis of any tumor can bring worry and anxiety. It is normal to feel stressed or concerned. Talk to your healthcare team about how you are feeling, and consider speaking with a mental health professional or joining a support group. You do not have to face this alone.

Prevention

Most carotid body tumors cannot be prevented. If you have a family history of these tumors or a genetic cause is found in your family, genetic counseling and regular screening may help detect tumors early, when they are easier to treat.

Vaccines

There is no vaccine to prevent carotid body tumors.

Screening programmes

There is no general screening for the public. However, if you carry a gene change linked to these tumors, your doctor may recommend regular imaging checks to catch the tumor early.

Complications

If left untreated

• The tumor may continue to grow slowly and press on nearby nerves and blood vessels.
• It may cause hoarseness, swallowing trouble, or, in rare cases, airway compression.
• A small number of tumors contain cancer cells and can spread to lymph nodes or other parts of the body.

Long-term outlook

The outlook is generally good. Most carotid body tumors are noncancerous, grow slowly, and can be successfully treated with surgery. The risk of recurrence is low after complete removal. Even when surgery is not possible, radiation therapy can often control the tumor for a long time. Your healthcare team will guide you through the best options, and many people continue to live normal, healthy lives.

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