Goiter is a condition where the butterfly-shaped thyroid gland located in the neck region enlarges. This could be in the form of growth of the whole gland or it may be the result of irregular cell growth that forms one or more nodules.
The thyroid gland swells as an adaptation in response to underproduction or overproduction of thyroid hormones. Some common causes of goiter include:
Less common causes of goiters include the following:
Most people with goiter only experience swelling at the base of the neck where the thyroid gland lies. If the goiter is small enough, it may not be noticeable to the naked eye but may only be discovered during a routine medical exam or an imaging test.
Excessive swelling in some cases can cause throat tightness, cough, voice hoarseness, trouble swallowing, and difficulty breathing.
Hyperthyroidism associated with goiter can result to metabolic changes such as:
Hypothyroidism, on the other hand, causes the following:
Severe cases of goiter can be diagnosed just by looking at the swelling at the patient’s neck but other procedures can be done for milder cases. Doctors can evaluate an enlarged thyroid gland by feeling your neck area for any nodules or tenderness. Thyroid blood tests are done to measure the amount of thyroid hormones your body has to determine if the gland is working properly.
Different imaging modalities can also be done to look at the thyroid gland:
For treatment, simple cases of goiter can go away on their own without much intervention. In hypothyroidism cases, medications such as levothyroxine are given as replacement to thyroid hormone. In hyperthyroidism cases, methimazole and propylthiouracil are examples of drugs that are usually prescribed by physicians. If the goiter is caused by inflammation, noninflammatory drugs are given.
Other forms of treatment for goiter are radioactive iodine treatment which involves taking a drug orally to kill thyroid cells to shrink the gland. Thyroidectomy is also a surgical option if the goiter is very large.
Since the most common cause of goiter is the lack of iodine in the diet, it would be best to include iodine-rich foods in the diet such as fish, dairy, eggs, or seaweed. Some table salts are also marketed as “iodized salt” which means they have extra iodine and these are actually developed to prevent iodine deficiency.