A goiter is an enlargement of the thyroid. The thyroid is a gland. It produces hormones that help regulate your body’s metabolism. It is located on the front of the neck, right below the Adam’s apple. Goiters are seldom painful. They tend to grow slowly.
There are different types of goiters. This sheet focuses on nontoxic (or sporadic) goiter. It is a type of simple goiter that may be:
Diffuse—enlarging the whole thyroid gland
Nodular—enlargement caused by nodules, or lumps, on the thyroid
The development of nodules marks a progression of the goiter. It should be evaluated by your doctor.
The exact causes of nontoxic goiter are not known. In general, goiters may be caused by too much or too little thyroid hormones. There is often normal thyroid function with a nontoxic goiter. Some possible causes of nontoxic goiter include:
Regular intake of substances (goitrogens) that inhibit production of thyroid hormone—common goitrogens include foods such as cabbage, turnips, brussel sprouts, seaweed, and millet
Iodine deficiency—Iodine deficiency is very rare in the US and other developed countries, due to the use of iodized table salt; this is a primary cause of goiter in other parts of the world, particularly in mountainous areas, or areas that experience heavy rainfall or flooding
The following factors increase your chance of developing nontoxic goiter:
Sex: female (nontoxic goiter is more common in women than men)
Age: over 40
If you have any of these risk factors, tell your doctor:
Family history of goiter
to head or neck, especially during childhood
Nontoxic goiters usually do not have noticeable symptoms. If you experience any of these, do not assume it is due to this condition. These may be caused by other, less serious health conditions. If these symptoms persist, see your doctor.
Swelling on the neck
Breathing difficulties, coughing, or wheezing with large goiter
Difficulty swallowing with large goiter
Feeling of pressure on the neck
Your doctor will ask about your symptoms and medical history. A physical exam will be done. Your doctor may recommend a specialist. An endocrinologist focuses on hormone related issues.
Tests may include the following:
Examination of the neck—to assess any thyroid enlargement
—a test that uses sound waves to identify nodules of the neck and thyroid
Blood tests—to assess levels of thyroid hormones (eg, thyroid stimulating hormone); thyroid autoantibodies tests may also be done
Thyroid scan (scintigraphy)—a picture of your thyroid gland taken after you have been given a shot or drink of a radioisotope to show how your thyroid is functioning and exclude
<![CDATA]>Fine needle aspiration biopsy<![CDATA]>
—a tissue sample is taken with a small needle to determine if it is benign or malignant (cancer); 50%-60% are noncancerous
—a test to determine if the enlarged goiter is compressing the esophagus, thus causing swallowing difficulty
of neck and chest for large goiters—to see if the trachea is compressed
Nontoxic goiters usually grow very slowly. They may not cause any symptoms. In this case they do not need treatment.
Treatment may be needed if the goiter grows rapidly, affects your neck or obstructs your breathing .
If a nontoxic goiter progresses to the nodular stage, and the nodule is found to be cancerous, you will need treatment. Talk with your doctor about the best plan for you. Treatment options include the following:
Hormone Suppression Therapy
Thyroid hormone medication is used to suppress secretion of thyrotropin (TSH). TSH is the thyroid-stimulating hormone that causes growth. This therapy is most effective for early stage goiters that have grown due to impaired hormone production. It is less effective for goiters that have progressed to the nodular stage.
Radioactive iodine treatment is used to reduce the size of large goiter. It is used in the elderly when surgical treatment is not an option.
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. 16th ed. New York, NY: McGraw-Hill; 2005.
Please be aware that this information is provided to supplement the care
provided by your physician. It is neither intended nor implied to be a
substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER
IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the
advice of your physician or other qualified health provider prior to
starting any new treatment or with any questions you may have regarding a