Table of Contents
- Overview
- Results
- Risks
- Prevention
Triiodothyronine; T3 radioimmunoassay
Normal Values
The range for normal values is 100 to 200 ng/dL (nanograms per deciliter).
Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.
What abnormal results mean
Greater than normal levels may indicate:
- High levels of a protein that carries T3 in the blood (may occur in pregnancy, with use of birth control pills or estrogen, liver disease, or as part of an inherited condition)
- Hyperthyroidism (for example,
Graves disease ) - T3
thyrotoxicosis (rare) -
Thyroid cancer (rare)
Lower than normal levels may be due to:
- Long-term illness
-
Hypothyroidism (for example,Hashimoto's disease ) - Starvation
Other conditions under which the test may be performed:
Painless (silent) thyroiditis Thyrotoxic periodic paralysis Toxic nodular goiter
Previous Section
Review Date: 04/20/2010
Reviewed By: Ari S. Eckman, MD, Division of Endocrinology and Metabolism, Johns
Hopkins School of Medicine, Baltimore, MD. Review provided by
VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA,
Medical Director, A.D.A.M., Inc.
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)
