TSH receptor antibody; Thyroid stimulating immunoglobulin

Normal values are less than 130% of basal activity.

Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

Greater than normal levels may indicate:

• Graves disease
• Hashitoxicosis
• Neonatal thyrotoxicosis

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TSI Overview

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TSI Risks

Review Date: 04/19/2010
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)