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Thyroid ultrasound

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Thyroid ultrasound

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Thyroid ultrasound

Definition:

The thyroid is a gland located in the neck that regulates metabolism. Ultrasound is a painless method of examining structures inside the body. This test involves high-frequency sound waves that are emitted and received by a transducer (a handheld instrument). These sound waves penetrate the body and are arranged into an image seen on a screen based on the way they bounce off of the various body structures.

Alternative Names:
Ultrasound - thyroid; Thyroid sonogram; Thyroid echogram

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How the test is performed:

The test is usually done in the ultrasound or radiology department. You will lie with your neck hyperextended (extended beyond its usual limit). Lubricant gel will be placed on your neck, and the transducer passed over the area.

How to prepare for the test:

No special preparation is necessary for this test.

Infants and children:

The preparation you can provide for this test depends on your child's age, previous experiences, and level of trust. For general information regarding how you can prepare your child, see the following topics:

• Infant test or procedure preparation (birth to 1 year)
• Toddler test or procedure preparation (1 to 3 years)
• Preschooler test or procedure preparation (3 to 6 years)
• Schoolage test or procedure preparation (6 to 12 years)
• Adolescent test or procedure preparation (12 to 18 years)

How the test will feel:

You should feel very little discomfort with this test. The conducting gel may be cold and your neck may feel stretched.

Why the test is performed:

Ultrasound is usually performed on the thyroid to differentiate between a cyst (a sac containing fluid) and a tumor (an abnormal tissue growth that may or may not be cancerous).

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