A lump in your neck? Let's learn about thyroid nodules.

Have you ever looked in the mirror or just touched your neck and noticed a small lump? Or has someone ever told you that your neck looks a little swollen? Many people get scared when they see something like this. But before we get scared, let's learn more about thyroid nodules .

What are Thyroid Nodules?

Simply put, the thyroid gland is a small butterfly-shaped gland located in the front of our neck, on either side of the windpipe. Its main function is to produce hormones that control our body's metabolism , which is the conversion of the food we eat into energy, and many other important things like heart rate .

So, sometimes some cells in this gland grow uncontrollably and form a lump or tumor. This is what we call a thyroid nodule. These can be solid or they can be like a fluid-filled sac (cyst).

Are these lumps dangerous? Could they be cancerous?

This is the question that comes to everyone's mind first. The good news is that most of the time the answer is 'no'.

These lumps are often so small that you don't even realize they're there. They're common as you get older. If they're not cancerous, you probably won't need any treatment. Your doctor will just keep an eye on them. That means they'll see if they get bigger or cause other problems.

What are the main types of thyroid nodules?

There are different types of thyroid nodules. Most of these are not cancerous and can be easily managed.

What symptoms might you have?

Most of the time, these lumps do not cause any symptoms. However, in some cases, depending on the nature of the lump, various symptoms may occur.

Symptoms caused by the enlargement of the lump

If the lump is large, it may press on other parts of the neck, causing symptoms such as:

• Difficulty breathing
• Difficulty swallowing food
• Constant feeling of a tickle in the throat
• Hoarseness or change in voice

Symptoms caused by nodules that produce too much hormone ("Hot Nodules")

Some nodules can cause the thyroid to produce too much hormone ( hyperthyroidism ). This can cause symptoms such as:

• Weight loss
• Muscle weakness
• Inability to tolerate the heat
• Frequent restlessness and irritability
• Heart palpitations
• Bone weakness

Symptoms of low hormone production (Hypothyroidism)

Sometimes people with thyroid nodules can also have low thyroid hormone levels, which can cause symptoms like:

• Extreme fatigue
• Inability to tolerate cold
• Obstruction
• Dry skin
• Weight gain
• Having a swollen face
• Thinning hair
• Memory loss and depression

What causes thyroid nodules?

It's hard to pinpoint a single cause for lumps, but there are several possible causes.

• Thyroiditis: This is a chronic inflammation of the thyroid gland. An example of this is a condition called Hashimoto's.
• Iodine Deficiency: Iodine is an essential mineral in our diet. If it is deficient, goiter can develop. However, in Sri Lanka, this condition is now very rare because iodine is added to the salt we eat.
• Thyroid Adenoma: This is an unexplained, harmless growth that occurs in the thyroid tissue.
• Thyroid cancer: Very rarely, a lump can be caused by cancer.

How does the doctor diagnose this? (Diagnosis)

If you suspect you have a lump in your neck, the first thing you should definitely do is see a doctor. He or she will examine you and refer you for these tests if necessary.

• Blood Tests: Your blood tests will check the levels of thyroid hormones (TSH, T3, T4) to see if your gland is working properly .
• Ultrasound Scan: This is a painless test. It can accurately determine the size and shape of the lump, and whether it is solid or fluid-filled (a cyst).
• Fine-Needle Aspiration Biopsy: This is the most important test. This involves inserting a very fine needle into the lump, using a scan, and taking a sample of cells from there and sending it to a lab. This is what most often determines whether the lump is cancerous or not.
• Thyroid Scan: This involves administering a small amount of radioactive iodine to the body and observing how the gland absorbs it.

What are the treatments?

Your doctor will decide whether or not your lump needs treatment, and what to do if it does. It depends on the type of lump, its size, symptoms, and the biopsy report.

• Observation: If the lump is small, has no signs of cancer, and is not causing any problems, your doctor will tell you to do nothing and just have a scan every once in a while.
• Draining: If the lump is a fluid-filled sac (cyst), it may be possible to drain the fluid with a fine needle.
• Ablation: A method of destroying tumors using methods such as heat or alcohol injections.
• Surgery: If the lump is large, if it is difficult to swallow or breathe, or if cancer is confirmed or suspected, surgery is performed to remove the lump or the entire thyroid gland. This surgery is called a thyroidectomy. If the entire gland is removed, you will have to take thyroid hormone pills for the rest of your life.

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