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The thyroid gland is a butterfly shaped organ located in the front of the neck and produces thyroid hormones. Thyroid hormones performed a wide variety of functions including body temperature, body weight, heart rate, nervous system and the digestive tract. Over time, approximately 4-10% of the population will develop nodules (growths or lumps) in thyroid gland. The majority (95%) of thyroid nodules are benign (not cancerous) and remain stable over time. Benign thyroid nodules may be filled with fluid, be solid or partly solid and fluid. It may also represent growth of normal thyroid tissue (colloid nodule), and occasionally produce high levels of thyroid hormone (hyperfunctioning thyroid nodule).
Majority of benign thyroid nodules are stable or slow-growing over time and do not cause symptoms (found incidentally). However, sometimes there may be neck pain, swallowing difficulty, foreign body sensation or cosmetic issues (visible or palpable swelling in the neck). Certain thyroid nodules may also rarely produce high levels of thyroid hormone, which can cause a wide range of symptoms including irritability, weight loss, difficulty sleeping, visual problems and heart palpitations.
There are no known measures identified to prevent benign thyroid nodules from developing in the majority of cases. However, a benign thyroid nodule which causes symptoms may benefit from an early intervention which can potentially reduce the nodule size.
The definitive causes of benign thyroid nodules have not been clearly identified. Some studies show that certain thyroid nodules may relate to smoking, obesity and metabolic syndrome or alcohol consumption (associated with thyroid gland enlargement, more so in women). Very rarely, thyroid growths may be caused by insufficient iodine in the diet, usually in the developing world.
Thyroid nodules are predominantly diagnosed by an ultrasound scan. Based on the scan result, certain thyroid nodules only require monitoring on follow-up, whereas some of them require biopsy, such as Fine Needle Aspiration Cytology (FNAC) or Core biopsy, to make a diagnosis.
After the alcohol sclerotherapy procedure, a small dressing will be placed over the site of the needle puncture, which can be removed at home in 1-2 days. You may have mild neck bruising, discomfort, swelling or pain, which will resolve in a few days. You will be able to eat, drink or carry out daily activities normally. An outpatient appointment will be given to you for post procedure follow-up. An ultrasound scan of the thyroid will be performed in about 6 months to assess nodule size reduction following the alcohol sclerotherapy.
