RT3U

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T3RU; Resin T3 uptake; T3 resin uptake; Thyroid hormone-binding ratio

24% to 37%

Greater-than-normal levels may indicate:

• hyperthyroidism
• nephrotic syndrome
• protein malnutrition
• renal failure

• acute hepatitis
• hypothyroidism
• hypothyroidism; primary
• hypothyroidism; secondary
• pregnancy
• estrogen administration

• chronic thyroiditis (Hashimoto's disease)
• drug-induced hypothyroidism
• Graves' disease
• subacute thyroiditis
• thyrotoxic periodic paralysis
• toxic nodular goiter

Review Date: 01/18/2006
Reviewed By: Nikheel S. Kolatkar, MD, Clinical and Research Fellow, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, MA. Review provided by VeriMed Healthcare Network.