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Our Health Information Database is provided by A.D.A.M. the leading provider of electronic and printed information for professionals and consumers in healthcare and industry. It provides authoritative, reliable content written and reviewed by an editorial board who represent a variety of specialty areas. This board reviews and evaluates all healthcare information to ensure it is accurate, reliable, and can be used with complete confidence. And now you have access to the same authoritative, trusted clinical information relied upon by health professionals around the world.
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:

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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Review Date: 5/23/2010

Review By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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