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Toxic nodular goiter

Definition

Toxic nodular goiter involves an enlarged thyroid gland that contains rounded growths called nodules. These nodules produce too much thyroid hormone.

Alternative Names

Toxic multinodular goiter; Plummer's disease

Causes, incidence, and risk factors

Toxic nodular goiter grows from an existing simple goiter . It occurs most often in the elderly. Risk factors include being female and over 60 years old. This disorder is almost never seen in children.

Sometimes patients with toxic multinodular goiter will develop high thyroid levels for the first time after they receive a large amount of iodine through a vein (intravenously). The iodine may be used as contrast for a CT scan or heart catheterization .

Symptoms

Symptoms are those of  an overactive thyroid gland (hyperthyroidism ). However, the bulging eyeballs seen in Graves disease do not occur.

Symptoms include:

Signs and tests

A physical examination will show one or many nodules in the thyroid. There may be a rapid heart rate .

Other tests that may be done:

Treatment

Treatments include:

  • Antithyroid drugs (propylthiouracil, methimazole)
  • Radioactive iodine
  • Surgery

Beta-blockers (propranolol) can control some of the symptoms of hyperthyroidism until thyroid hormone levels in the body are under control.

Support Groups

Expectations (prognosis)

Because toxic nodular goiter is mainly a disease of the elderly, other chronic health problems may influence the outcome of this condition. An elderly person may be less able to tolerate the effect of hyperthyroidism on the heart.

Complications

Heart complications:

Other complications:

Thyroid crisis or storm is an acute worsening of hyperthyroidism symptoms. It may occur with infection or stress . Thyroid crisis may cause:

  • Abdominal pain
  • Decreased mental alertness
  • Fever

People with this condition need to go to the hospital right away.

Complications of having a very large goiter may include difficulty breathing. This is due to pressure on the airway passage that lies behind the thyroid.

Calling your health care provider

Call your health care provider if you have symptoms of this disorder. Follow the health care provider's recommendations for follow-up visits.

Prevention

To prevent toxic nodular goiter, treat hyperthyroidism and simple goiter as your health care provider recommends.

References

Ladenson P, Kim M. Thyroid. In: Goldman L and Ausiello D, eds. . 23rd ed. Philadelphia, Pa: Saunders; 2007:chap 244.

Davies TF, Larsen PR. Thyrotoxicosis. In: Kronenberg HM, Melmed S, Polonsky KS, Larsen PR, eds. . 11th ed. Philadelphia, Pa: Saunders Elsevier;2008:chap 11.

Encyclopedia content is provided as information only and not intended to replace the advice and instruction from your personal physician.