Thyroid diseases

Definition

The thyroid gland is located in the front of the neck, just below the voice box (larynx). It produces chemicals (hormones) that help the body control metabolism. Thyroid hormone is normally produced in response to another hormone released by the pituitary gland.

There are four main types of thyroid disease:

  • Hyperthyroidism — too much thyroid hormone
  • Hypothyroidism — too little thyroid hormone
  • Benign (noncancerous) thyroid disease
  • Thyroid cancer

For information about a specific type of thyroid disease, see one of the following:

  • Anaplastic carcinoma of the thyroid
  • Chronic thyroiditis (Hashimoto’s disease)
  • Congenital goiter
  • Goiter
  • Hyperthyroidism
  • Hypopituitarism
  • Hypothyroidism
  • Medullary thyroid carcinoma
  • Multiple endocrine neoplasia (MEN) II
  • Painless (silent) thyroiditis
  • Papillary carcinoma of the thyroid
  • Subacute thyroiditis
  • Thyroid cancer
  • Toxic nodular goiter

Alternative Names

Causes, incidence, and risk factors

 

Symptoms

 

Signs and tests

 

Treatment

 

Support Groups

 

Expectations (prognosis)

 

Complications

 

Calling your health care provider

 

Prevention

 

References

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

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