Have you ever felt like there was a lump or swelling in the front of your neck? Maybe you saw it when you looked in the mirror, or someone else told you about it. It's normal to feel a little scared when you see something like this. But although many people are afraid of this, this can often be a condition called 'Goiter'. Today, we will talk about this very simply, in a way that you can understand.
Simply put, what is goiter?
Goiter is an enlargement of your thyroid gland. Imagine, in the front of our neck, just below the Adam's apple, there is a small butterfly-shaped gland. That's what we call the thyroid gland .
This small gland produces two very important hormones for our body. They are thyroxine (T4) and triiodothyronine (T3). These hormones control many things in our body. Just like the engine of a car.
- Metabolism: This is the rate at which the food we eat is converted into energy.
- Body temperature: Regulates our body temperature.
- Mood: Affects our mood, happiness, and anger.
- Heart rate: Controls the rate at which our heart beats.
- Digestion: Helps us digest the food we eat.
So, if for some reason the thyroid gland becomes swollen or enlarged, we call that condition a 'goiter'. This can be a lump or nodule within the gland.
The important thing is that not all goiters cause thyroid hormone levels to be abnormal. Sometimes, the gland can become enlarged even when hormone levels are normal.
What are the types of goiter?
Doctors classify goiters in several ways. One is by how it swells. The other is by the level of thyroid hormone. Let's take a simple look at both of these.
Classification according to the type of swelling
| Type of goiter | Simple explanation |
|---|---|
| Simple (diffuse) goiter | What happens in this case is that the entire thyroid gland swells up in the same way. When you touch the neck, it feels like a smooth swelling. |
| Nodular goiter | In this, a solid or fluid-filled lump (nodule) forms inside the thyroid gland. Therefore, when you touch the neck, you feel a lump. |
| Multinodular goiter | This causes many lumps (nodules) to form inside the gland. Some are visible from the outside, while others can only be found during a doctor's examination or a scan. |
Classification by thyroid hormone levels
- Toxic goiter: In this, the thyroid gland becomes enlarged and produces more thyroid hormones than necessary . This is also called `Hyperthyroidism`.
- Nontoxic goiter: In this case, although the thyroid gland is enlarged, the hormone levels are normal . That is, there is neither an increase (`Hyperthyroidism`) nor a decrease (`Hypothyroidism`) in hormones.
Who is most at risk of developing this condition?
Anyone can develop a goiter, but some people are at a higher risk.
- For women: Women are about four times more likely to develop a goiter than men.
- Age: This risk increases after the age of 40.
- Family history: If someone in your family has thyroid disease, you are more likely to develop it too.
- Other health conditions: People with conditions such as obesity and insulin resistance are also at higher risk.
- Exposure to radiation: If the neck or head area has been exposed to radiation for medical treatment, that is also a risk factor.
The main cause of goiter worldwide is iodine deficiency . However, in countries like Sri Lanka, since we add iodine to the salt we use, that cause is now much less common.
What are the symptoms of a goiter?
A goiter can range in size from small, barely noticeable, to large, visible goiters. Most often, goiters are painless. However, if they are accompanied by inflammation of the thyroid gland (thyroiditis), they can be painful.
Let's see what the symptoms are in the table below.
| Symptom category | Visible features |
|---|---|
| Main symptoms | |
| Neck swelling | The appearance of a lump or swelling in the front of the neck, below the larynx. |
| Sore throat | Feeling as if your throat is constricted, like a tie is tightening. |
| Voice change | Hoarseness, loss of clarity of voice. |
| Less common symptoms | Difficulty breathing, coughing, difficulty swallowing, fainting when raising the arms. |
| Symptoms of hyperthyroidism | |
| Heartbeat | Rapid heartbeat (Tachycardia). |
| Weight loss | Weight loss for no reason, even though you eat well. |
| Other features | Sweating more than usual, frequent urination, trembling hands, and restlessness. |
| Symptoms of hypothyroidism | |
| Body fatigue | Constant tiredness and sleepiness. |
| Weight gain | Weight gain for no reason, even though you control your diet. |
| Other features | Constipation, dry skin, irregular menstrual cycles in women. |
What are the causes of goiter?
Goiter is a symptom of pressure on the thyroid gland. It can have several causes.
- Iodine deficiency: This is the leading cause in the world. Iodine is essential for the production of thyroid hormones. If you don't get enough iodine from your diet, the gland will try to make more cells, grow bigger, and somehow make the hormones.
- Graves' disease: This is an `autoimmune` condition. This means that our body's own immune system attacks our thyroid gland. This causes the gland to become overstimulated, enlarged, and produce too much hormone (`Hyperthyroidism`).
- Hashimoto's disease: This is also an `autoimmune` condition. In this condition, the immune system attacks the gland and causes it to become inflamed. Over time, the gland's function becomes impaired and it produces insufficient hormones (`Hypothyroidism`). The gland may swell to compensate.
- Thyroid cancer: Thyroid cancer can also cause the gland to enlarge. However, not all goiters are cancerous . A medical examination is needed to know for sure.
- Pregnancy: The thyroid gland may become slightly enlarged due to the hormone ``Human chorionic gonadotropin`` (HCG), which is secreted during pregnancy.
- Thyroiditis: The gland can become inflamed and swollen due to various reasons.
How does the doctor diagnose this as goiter?
If you have a lump in your neck, you should definitely see a doctor . The doctor will do some tests to find out if it's a goiter and what's causing it.
1. Physical examination: First, the doctor will feel your neck to check for swelling, lumps, and pain.
2. Blood tests: Thyroid hormone (T3, T4) and TSH levels are measured. This can tell if the gland is working properly and if there is too much or too little hormone.
3. Thyroid Ultrasound Scan: Similar to a baby scan, this looks at the gland in the neck. It can clearly see how big the gland is, if there are any lumps, and whether the lumps are solid or liquid.
4. Biopsy: If the scan shows a large or suspicious lump, the doctor will use a needle to take a small sample of cells from the lump and send it to the lab to test for cancer cells. This is done to rule out any possibility of cancer.
5. CT or MRI scan: If the goiter is very large, or if there is a suspicion that it has grown into the chest, this type of scan may also be done.
What are the treatments for goiter?
Treatment depends on the size of the goiter, the symptoms you have, and the cause.
- Watchful waiting: If the goiter is small, you are not having any problems, and your hormone levels are normal, your doctor may decide to observe you for a specific period of time without any treatment.
- Types of medicines:
- If hormone levels are low ( Hypothyroidism ), hormone pills such as `Levothyroxine' are prescribed to be taken daily.
- If hormone levels are high ( hyperthyroidism ), medications such as Methimazole are prescribed to reduce hormone production.
- If the goiter is caused by inflammation of the gland, painkillers or a corticosteroid may be given.
- Radioactive iodine therapy: This is a treatment for hyperthyroidism. You take a liquid or capsule of radioactive iodine that goes into the thyroid gland, destroying the overactive cells there and causing the gland to shrink.
- Surgery (Surgery - Thyroidectomy):
- If the goiter is very large and makes it difficult to breathe or swallow.
- If it is confirmed to be cancer.
- If there is a big problem with appearance.
In these cases, your doctor may recommend surgery to remove part or all of the gland. If the gland is completely removed, you will have to take thyroid hormone pills for the rest of your life.
The most important thing is that the doctor who examines you will decide what treatment is best for you. So don't compare yourself to other people's experiences.
Take-Home Message
- If you notice a swelling or lump in your neck, don't ignore it. It could be a goiter.
- There's no need to panic when you see a goiter. Most goiters are not cancerous.
- Whatever the reason, it is very important to see a doctor and get an accurate diagnosis.
- Treatment depends on your condition. Sometimes, no treatment may be needed.
- If you know you have a goiter, attend the scheduled tests as directed by your doctor.
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