What Is a Thyroid Adenoma?

The thyroid is a small, butterfly-shaped gland in the front of your throat that produces hormones affecting a number of bodily processes, from metabolism to heart rate. Thyroid disease is relatively common, and having a thyroid adenoma—a benign cyst—is one presentation of thyroid disease.

A thyroid adenoma is a noncancerous lesion on the thyroid. Although they’re not cancer, they can still affect your overall health. Thyroid adenomas can be inactive, meaning they don’t produce thyroid hormones, or active, meaning they produce hormones.

In rare cases—about 1% of people—an active thyroid adenoma can cause hyperthyroidism, or an overproduction of thyroid hormones. However, most patients with a thyroid adenoma do not have any symptoms.

Symptoms of Thyroid Adenoma 

About 7% of people have some sort of abnormal growth on their thyroids .Mulita, Francesk. Thyroid Adenoma. A thyroid adenoma is one type of growth and is estimated to occur in 3% to 4% of people.Thyroid adenomas are not inherently harmful, and most people with thyroid adenomas don’t experience any symptoms.1 However, in some cases, having an active adenoma—also known as a toxic thyroid adenoma—can cause the thyroid to produce too many hormones. This can lead to symptoms of hyperthyroidism, or overactive thyroid, including.

• Fatigue
• Weight loss
• Irritability, mood swings, or nervousness
• Excessive sweating or sensitivity to heat

In addition to hyperthyroidism, people with a thyroid adenoma might experience vocal changes, hoarseness, and trouble swallowing or breathing. These symptoms occur when the thyroid adenoma is pushing against the larynx, trachea (windpipe), and other structures in the throat.

Diagnosis

Since most people don’t have symptoms of a thyroid adenoma, these lesions are often caught during medical imaging procedures for other health concerns.1

After spotting an unusual growth on the thyroid, healthcare providers need to determine whether the growth is affecting hormone levels, and whether or not it is cancerous. In order to diagnose a thyroid adenoma, healthcare providers have to rule out other thyroid conditions that present in a similar way.1

To do this, practitioners will order:

• Ultrasound imaging
• A blood test to measure your thyroid-stimulating hormone (TSH) levels
• A biopsy

This can also help determine the likelihood that a growth is cancerous since malignant and benign thyroid growths affect hormone levels in different ways.

Treatment

If you are not experiencing symptoms from your thyroid adenoma, healthcare providers might recommend no treatment. In that case, they’ll monitor the size of the adenoma and your thyroid levels every six to 12 months to make sure any complications that arise down the line are detected early.In some cases, where the symptoms of a thyroid adenoma are severe, your healthcare provider might recommend surgery. This is usually used for an immediate resolution of symptoms, including hyperthyroidism or compression on the windpipe.

• Thyroidectomy removes all of the thyroid, or just a part, like the adenoma.
• Thyroid lobectomy removes the half of the thyroid that the adenoma is on.
• Isthmusectomy removes just the isthmus.

Your healthcare provider will consider the position and size of your adenoma, your symptoms, and any other health considerations you have in order to determine the best treatment for you.

Risk for Thyroid Adenoma

Most people have a low risk—less than 5%—of developing a thyroid adenoma. However, certain factors can increase your risk for a thyroid adenoma, including:3

• Gender: Thyroid adenomas are more common in women than men. In fact, women are at a higher risk of all thyroid disease. But if men have thyroid growths, they are more likely to be cancerous than growths in women.
• Age: Thyroid adenomas become more common as people get older.
• Genetics: Certain genes increase the risk for thyroid adenoma. If you have a close family member who has had a thyroid adenoma, your risk may be higher.
• Iodine deficiency: Iodine deficiency is closely linked to the development of thyroid adenomas. However, iodine deficiency is extremely rare in the United States since salt is ionized.