A goiter is an abnormal enlargement of the thyroid gland. It is not a disease itself but rather a sign that something is causing the thyroid to grow. Goiters range from small, barely noticeable enlargements to large masses that cause visible swelling in the neck.

Types of Goiter

  • Simple (diffuse) goiter — Uniform enlargement of the entire gland without nodules, often related to iodine deficiency or thyroiditis
  • Multinodular goiter — Enlargement with multiple nodules within the gland; the most common type in developed countries
  • Toxic goiter — An enlarged gland that is overactive (producing excess hormone); may be diffuse (Graves' disease) or multinodular
  • Endemic goiter — Caused by iodine deficiency; rare in iodine-sufficient countries like the U.S.

Causes

Goiters develop when the thyroid is stimulated to grow. Common causes include Hashimoto's thyroiditis, Graves' disease, iodine deficiency, toxic multinodular goiter, thyroid nodules, thyroid cancer (rare), and certain medications. In many cases no cause is identified (sporadic goiter).

Symptoms

Small goiters often cause no symptoms. Larger goiters may cause:

  • Visible swelling at the base of the neck
  • Tightness in the throat
  • Difficulty swallowing (dysphagia)
  • Coughing or wheezing
  • Difficulty breathing, particularly when lying flat
  • Hoarseness (if pressing on the laryngeal nerve)

Symptoms related to thyroid function (fatigue, palpitations, weight changes) depend on whether the goiter is associated with hypo- or hyperthyroidism.

Diagnosis and Treatment

Evaluation includes TSH testing, thyroid ultrasound, and sometimes CT scan (if the goiter extends into the chest). Thyroid function tests determine if the goiter is associated with hypothyroidism or hyperthyroidism.

Treatment depends on the underlying cause and the size of the goiter. Options include monitoring (watchful waiting for small, stable goiters), thyroid hormone therapy, treatment of the underlying thyroid disorder, radioactive iodine, or surgery for large compressive goiters or those with concerning nodules.

Key Takeaways

  • A goiter is an enlarged thyroid — it's a sign, not a specific diagnosis
  • Many goiters are asymptomatic; large ones can cause throat tightness and swallowing difficulty
  • Evaluation requires TSH testing and thyroid ultrasound
  • Treatment depends on the underlying cause and size of the goiter
Medical Disclaimer: This article is for educational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider before making any changes to your treatment plan. Individual medical decisions should be made in partnership with your physician based on your specific circumstances.