Carotid Body Tumors: A Rare, Usually Benign Neck Growth — Symptoms, Causes, Diagnosis, and Treatment Explained
Updated: 3 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick answer
A carotid body tumor is a mass that grows in blood vessels near the carotid arteries in the neck, also called a paraganglioma or chemodectoma [1] [2]. Most are benign, with less than 10% estimated to be malignant, and they are very rare [1]. Diagnosis uses a physical exam and imaging, and treatment includes surgery, radiation therapy or transcatheter embolization [1].
What the research says
According to PubMed:
Embolization before surgery lowered blood loss and operating time without raising nerve or stroke risk. A meta-analysis of 25 studies (1,326 patients) found lower intraoperative blood loss (weighted mean difference −135.32; 95% CI −224.58 to −46.06) and shorter operations (−38.61; 95% CI −65.61 to −11.62) with preoperative embolization, and no significant difference in cranial nerve injury (OR 1.13) or stroke (OR 1.75). (Texakalidis et al., World Neurosurg, 2019 [5]).
Where and how the tumor is first treated affects surgical complexity. In 56 carotid body tumors operated on over 25 years (22 Shamblin type I, 28 type II, 8 type III), carotid reconstruction was needed in 1 of 35 first-time cases versus 9 of 21 after earlier removal attempts, and complications were 23% versus 30%. There were no recurrences during follow-up, and cranial nerve injury was the most common complication. (Gad et al., Ann Vasc Dis, 2014 [4]).
Watchful waiting can be reasonable in selected people. In a case report of a 34-year-old woman with bilateral tumors, one tumor was removed but the vagal nerve could not be spared; the other tumor was observed with serial imaging, and she was free of disease progression 5 years later. (Demir et al., Am J Case Rep, 2014 [3]).
Study details are from PubMed abstracts.
What Is a Carotid Body Tumor?
A carotid body tumor is a mass that grows in the blood vessels near the large arteries on either side of your neck. These are the carotid arteries — the tubes that carry blood from your heart up to your head and brain.
The growth has other medical names as well. You may hear it called a carotid body paraganglioma or a carotid body chemodectoma [1] [2]. These are simply different ways of naming the same type of growth in this specific spot.
Is a carotid body tumor cancer?
Most carotid body tumors are benign, which means they are not cancer. Some studies estimate that less than 10% of carotid body tumors are malignant (cancerous) [1] [6]. This is one reason doctors often take a "watch and treat" approach — the tumor is usually slow and harmless, but it can be dealt with if it starts to cause trouble.
Who can get a carotid body tumor?
Anyone can get a carotid body tumor. The condition appears to be more common in females than in males, and it usually happens in people older than 20 [1].
How rare are carotid body tumors?
They are very rare. Carotid body tumors occur in about 1 in 30,000 people [1].
How will a carotid body tumor affect me?
Carotid body tumors are often painless [1] [6]. Even so, a healthcare provider may recommend removing the tumor because it can grow large and affect the blood vessels in the neck or cause other symptoms as it presses on nearby structures.
What Are the Symptoms of a Carotid Body Tumor?
A carotid body tumor may not cause any symptoms at all, especially at first. But as the mass grows, it can press on nearby nerves and blood vessels. That pressure is what creates the warning signs.
The most common first clue is a lump you can feel on your neck [1]. Other possible symptoms include:
Symptom | What it means |
Lump on the neck | The growing mass becomes large enough to feel under the skin |
Hoarseness | Pressure from the tumor affects the nerves that control the voice |
Numbness in the tongue | Pressure on nerves that carry sensation from the tongue |
Sore throat | The mass irritates nearby tissue in the throat area |
Swallowing problems (dysphagia) [1] | Pressure makes it harder or uncomfortable to swallow |
Dysphagia (dis-FAH-jee-uh) is the medical word for difficulty swallowing. It is one of the most noticeable symptoms of a growing carotid body tumor.
What Causes Carotid Body Tumors?
Researchers don't know exactly why carotid body tumors form. What they do know is that these growths are more common in people with oxygen deprivation, a condition called hypoxia (hy-POK-see-uh) [1]. This is why carotid body tumors are seen more often in people who live at high altitude or who have long-term lung or heart problems that reduce the oxygen in their blood.
There are two patterns in how these tumors develop:
So the large majority of cases happen by chance in people with no family connection at all. A smaller group of cases appears in families where the trait runs in the bloodline.
How Do Healthcare Providers Diagnose a Carotid Body Tumor?
Diagnosis usually starts with a physical examination of the head and neck [1]. The provider feels for a lump and checks the neck structures. If they find signs of a carotid body tumor, they order imaging tests to confirm it.
What tests confirm the diagnosis?
Healthcare providers use imaging tests to look at the mass and the blood vessels around it [1]:
Test | What it does |
CT scan | Uses X-rays to build detailed pictures of the neck and the tumor |
MRI | Uses magnets and radio waves to show soft tissue in fine detail |
MRA (magnetic resonance angiography) | A special MRI that maps the blood vessels around the tumor |
Ultrasound | Uses sound waves to create images of the neck lump |
These tests show where the tumor sits, how big it is, and how close it is to the carotid arteries and nearby nerves — information the surgeon needs before deciding on treatment.
How Is a Carotid Body Tumor Treated?
Carotid body tumor treatment is based on the tumor's size [1], and your healthcare provider will discuss your symptoms before recommending an approach. There are three main approaches:
Treatment | How it works |
Surgery | The tumor is removed through an operation in the neck |
Radiation therapy | Focused high-energy beams damage the tumor cells |
Transcatheter embolization | A thin tube is guided to the tumor and blocks its blood supply, starving it [1] |
Embolization is sometimes done before surgery to shrink the tumor and make the operation easier [1] [6].
What happens if the tumor is large?
When surgeons remove large carotid body tumors, a hole may remain in the carotid artery. The surgeon can close that hole and restore the artery during the same operation by using a patch or graft — a small piece of tissue or material that seals the artery [1].
Can treatment cause complications?
Many people who receive treatment for a carotid body tumor have no complications [1]. But the operation involves many blood vessels, so some people may experience:
Possible complication | What it involves |
Difficulty swallowing (dysphagia) | Swallowing remains harder after surgery |
Cranial nerve injury | The nerves that control the face, tongue, and throat may be affected |
Incision healing problems | The surgical cut heals slowly or poorly |
Stroke | Disruption of blood flow can occasionally cause a stroke [1] |
How long is recovery?
Recovery time after surgery for a carotid body tumor is typically three to four weeks [1]. Follow your healthcare provider's instructions for incision care, and talk to your provider about how to care for yourself while you heal.
What's the Outlook?
Your provider will discuss your symptoms and recommend treatment based on the tumor's size. If your provider recommends observing the tumor — sometimes called watchful waiting — contact them right away if you develop any new symptoms.
Is a carotid body tumor curable?
If you have surgery to remove a carotid body tumor, you typically don't need further treatment [1]. Removal is usually definitive.
Can I Prevent a Carotid Body Tumor?
Carotid body tumors cannot be prevented, and there is no way to reduce your risk of getting one [1]. If your biological family has a history of carotid body tumors, talk with your healthcare provider about your risk and about genetic testing, since a sizable share of these tumors (estimates range from about 10% to more than 30%) are linked to inherited gene changes [1].
When Should I Contact My Healthcare Provider?
Contact your healthcare provider right away if you notice any new symptoms, such as a new neck lump, hoarseness, tongue numbness, a sore throat, or trouble swallowing. Your provider will talk with you about treatment options that may be right for you.
If you are already watching a tumor, don't wait for your next appointment when something changes — new symptoms deserve a call right away.
What's the Bottom Line?
Carotid body tumors are rare neck growths — about 1 in 30,000 people — that form near the arteries carrying blood to the brain. The good news: most are benign, and fewer than 1 in 10 are cancerous. They often start quietly, with no symptoms at all, then announce themselves through a neck lump, hoarseness, or swallowing trouble. Imaging tests confirm the diagnosis, and surgery, radiation, or embolization can remove or control the tumor. Most people recover in three to four weeks, and after successful surgery, further treatment is usually unnecessary.
Get trusted health answers from Rinnit.com. Explore more plain-English guides on neck lumps, vascular tumors, and rare growths — written for real people, not medical textbooks. Visit Rinnit.com.
Frequently asked questions
What is a carotid body tumor?
A carotid body tumor is a mass that grows in the blood vessels near the carotid arteries — the large arteries on either side of the neck that carry blood from the heart to the head and brain. It is also called a carotid body paraganglioma or chemodectoma.
Are carotid body tumors cancerous?
Most are not. Carotid body tumors are usually benign (noncancerous), and studies estimate that less than 10% are malignant.
How rare are carotid body tumors?
Carotid body tumors are very rare, occurring in about 1 in 30,000 people.
Who is most likely to get a carotid body tumor?
Anyone can get one, but they are more common in females than males and usually appear in people older than 20.
What causes carotid body tumors?
The exact cause is unknown, but they are more common in people with oxygen deprivation (hypoxia). About 90% of cases are sporadic, and about 10% are familial (genetic).
What are the symptoms of a carotid body tumor?
Symptoms may include a lump on the neck, hoarseness, numbness in the tongue, sore throat, and swallowing problems (dysphagia). Many tumors cause no symptoms at first.
Can a carotid body tumor be felt?
Yes — as it grows, it often forms a lump that can be felt on the neck, which is frequently the first sign.
How is a carotid body tumor diagnosed?
Diagnosis starts with a physical examination of the head and neck, followed by imaging tests such as a CT scan, MRI, MRA, or ultrasound to confirm the tumor and map the nearby blood vessels.
What is dysphagia?
Dysphagia (dis-FAH-jee-uh) is the medical term for difficulty swallowing. It happens when a growing carotid body tumor presses on nerves and structures involved in swallowing.
How is a carotid body tumor treated?
Treatment options include surgery to remove the tumor, radiation therapy, and transcatheter embolization — a procedure that blocks the tumor's blood supply, sometimes used before surgery to shrink the tumor.
What is transcatheter embolization?
Transcatheter embolization is a procedure where a thin tube is guided to the tumor's blood supply and used to block blood flow to the tumor, starving it. It may be performed before surgery to make the operation easier.
What happens during surgery for a large carotid body tumor?
Removing a large tumor may leave a hole in the carotid artery. The surgeon can use a patch or graft to close the hole and restore the artery during the same operation.
Are there complications from treatment?
Most people have no complications, but possible issues include difficulty swallowing, cranial nerve injury, healing problems at the incision site, and stroke.
How long does recovery take after surgery?
Recovery is typically three to four weeks, with incision care instructions provided by the healthcare provider.
Will I need treatment again after the tumor is removed?
If the tumor is removed with surgery, you typically don't need further treatment.
Can I prevent a carotid body tumor?
There is no way to prevent or reduce the risk of a carotid body tumor. If you have a family history of them, talk with your healthcare provider about your risk.
When should I contact my healthcare provider?
Contact your provider right away if you notice any new symptoms, such as a neck lump, hoarseness, tongue numbness, sore throat, or swallowing problems.
Is watchful waiting ever a good option?
Yes — if your provider recommends observing the tumor instead of immediate treatment, the key rule is to report any new symptoms right away rather than waiting for the next scheduled appointment.
What is hypoxia?
Hypoxia (hy-POK-see-uh) is oxygen deprivation — when tissues in the body don't get enough oxygen. Carotid body tumors are more common in people with this condition.
Is a carotid body tumor the same as a paraganglioma?
Yes — "carotid body paraganglioma" is another medical name for the same tumor. It is a type of paraganglioma that grows at the carotid body, a small group of cells where the carotid arteries branch in the neck.
Related reading
This article is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified healthcare provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay seeking it because of something you have read here. If you or a loved one is experiencing a medical emergency, call 911 or go to your nearest emergency center immediately.
References
Cleveland Clinic. Carotid Body Tumors. Cleveland Clinic. Last updated August 16, 2022. https://my.clevelandclinic.org/health/diseases/16848-carotid-body-tumors
Radiopaedia. Carotid body tumor. Radiopaedia.org. Last revised August 30, 2023. https://radiopaedia.org/articles/carotid-body-tumour?lang=us
Demir T, Uyar I, Demir HB, et al. Five-year follow-up of a patient with bilateral carotid body tumors after unilateral surgical resection. Am J Case Rep. 2014;15:426-430. PMID 25278171. https://doi.org/10.12659/AJCR.891150
Gad A, Sayed A, Elwan H, et al. Carotid body tumors: a review of 25 years experience in diagnosis and management of 56 tumors. Ann Vasc Dis. 2014;7(3):292-299. PMID 25298832. https://doi.org/10.3400/avd.oa.13-00116
Texakalidis P, Charisis N, Giannopoulos S, et al. Role of preoperative embolization in carotid body tumor surgery: a systematic review and meta-analysis. World Neurosurg. 2019;129:503-513.e2. PMID 31154101. https://doi.org/10.1016/j.wneu.2019.05.209
Wieneke JA, Smith A. Paraganglioma: carotid body tumor. Head Neck Pathol. 2009;3(4):303-306. PMID 20016787. https://doi.org/10.1007/s12105-009-0130-5
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