BACK
TO
TOP
Browse A-Z
Print-Friendly
Bookmarks
bookmarks-menu

Thyroid ultrasound

Ultrasound - thyroid; Thyroid sonogram; Thyroid echogram; Thyroid nodule - ultrasound; Goiter - ultrasound

A thyroid ultrasound is an imaging method to see the thyroid, a gland in the neck that regulates metabolism (the many processes that control the rate of activity in cells and tissues).

How the Test is Performed

Ultrasound is a painless method that uses sound waves to create images of the inside of the body. The test is often done in the ultrasound or radiology department of a hospital. It also can be done in a clinic.

The test is done in this way:

  • You lie down with your neck on a pillow or other soft support. Your neck is stretched slightly.
  • The ultrasound technician applies a water-based gel on your neck to help transmit the sound waves.
  • Next, the technician moves a wand, called a transducer, back and forth on the skin of your neck. The transducer gives off sound waves. The sound waves go through your body and bounce off the area being studied (in this case, the thyroid gland). A computer looks at the pattern that the sound waves create when bouncing back, and creates an image from them.

How to Prepare for the Test

No special preparation is necessary for this test.

How the Test will Feel

You should feel very little discomfort with this test. The gel may be cold.

Why the Test is Performed

A thyroid ultrasound is usually done when a physical exam shows any of these findings:

  • You have a growth on your thyroid gland, called a thyroid nodule.
  • The thyroid feels big or irregular, called a goiter.
  • You have abnormal lymph nodes near your thyroid.

Ultrasound is also often used to guide the needle in biopsies of:

  • Thyroid nodules or the thyroid gland -- In this test, a needle draws out a small amount of tissue from the nodule or thyroid gland. This is a test to diagnose thyroid disease or thyroid cancer.
  • The parathyroid gland.
  • Lymph nodes in the area of the thyroid.

Normal Results

A normal result will show that the thyroid has a normal size, shape, and position.

What Abnormal Results Mean

Abnormal results may be due to:

  • Cysts (nodules filled with fluid)
  • Enlargement of the thyroid gland (goiter)
  • Thyroid nodules
  • Thyroiditis, or inflammation of the thyroid (if a biopsy is done)
  • Thyroid cancer (if a biopsy is done)

Your health care provider can use these results and the results of other tests to direct your care. Thyroid ultrasounds are becoming better and predicting whether a thyroid nodule is benign or is a cancer. Many thyroid ultrasound reports will now give each nodule a score and discuss the characteristics of the nodule that caused the score. Talk to your provider about the results of any thyroid ultrasound.

Risks

There are no documented risks for ultrasound.

Open References

References

Salvatore D, Cohen R, Kopp PA, Larsen PR. Thyroid pathophysiology and diagnostic evaluation. In: Melmed S, Auchus RJ, Goldfine AB, Koenig RJ, Rosen CJ, eds. Williams Textbook of Endocrinology. 14th ed. Philadelphia, PA: Elsevier; 2020:chap 11.

Sipos JA. Thyroid imaging. In: Robertson RP, ed. DeGroot's Endocrinology. 8th ed. Philadelphia, PA: Elsevier; 2023:chap 69.

  • Thyroid ultrasound

    Thyroid ultrasound - illustration

    Thyroid ultrasound is a sound wave picture of the thyroid gland taken by a hand-held instrument and translated to a 2-dimensional picture on a monitor. It is used in diagnosis of tumors, cysts or goiters of the thyroid, and is a painless, no-risk procedure.

    Thyroid ultrasound

    illustration

  • Thyroid gland

    Thyroid gland - illustration

    The thyroid gland, a part of the endocrine (hormone) system, plays a major role in regulating the body's metabolism.

    Thyroid gland

    illustration

  • Thyroid ultrasound

    Thyroid ultrasound - illustration

    Thyroid ultrasound is a sound wave picture of the thyroid gland taken by a hand-held instrument and translated to a 2-dimensional picture on a monitor. It is used in diagnosis of tumors, cysts or goiters of the thyroid, and is a painless, no-risk procedure.

    Thyroid ultrasound

    illustration

  • Thyroid gland

    Thyroid gland - illustration

    The thyroid gland, a part of the endocrine (hormone) system, plays a major role in regulating the body's metabolism.

    Thyroid gland

    illustration

Tests for Thyroid ultrasound

 
 

Review Date: 2/28/2024

Reviewed By: Sandeep K. Dhaliwal, MD, board-certified in Diabetes, Endocrinology, and Metabolism, Springfield, VA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. No warranty of any kind, either expressed or implied, is made as to the accuracy, reliability, timeliness, or correctness of any translations made by a third-party service of the information provided herein into any other language. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
© 1997- adam.comAll rights reserved.

 
 
 

 

 

A.D.A.M. content is best viewed in IE9 or above, Firefox and Google Chrome browser.
Content is best viewed in IE9 or above, Firefox and Google Chrome browser.