A thyroid scan uses a
radioactive tracer and a special camera to make a
picture of the
thyroid gland. The radioactive tracer used in this test is usually iodine or
technetium. A thyroid scan is done to help find problems with the
| Normal: |
A normal thyroid scan shows a small
butterfly-shaped thyroid gland about 2 in. (5 cm) long and
2 in. (5 cm) wide with an
even spread of radioactive tracer in the gland.
Abnormal: || |
An abnormal thyroid scan shows a thyroid
gland that is smaller or larger than normal. It can also show areas in the
thyroid gland where the activity is less than normal (cold
nodules) or more than normal (hot nodules). Cold
nodules may be related to
A whole-body scan will show whether iodine
is in bone or other tissue (iodine uptake) after the thyroid gland has been
removed for cancer. The whole-body scan can check to see if cancer has spread
to other areas of the body.
E. Gregory Thompson, MD - Internal Medicine
Matthew I. Kim, MD - Endocrinology
May 31, 2011
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