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What is a Normal TSH?

By Mary Shomon, About.com

About.com Health's Disease and Condition content is reviewed by our Medical Review Board

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What is a TSH Test?

The TSH -- Thyroid Stimulating Hormone -- blood test is considered by some physicians to be the only test needed to diagnose and manage an underactive or overactive thyroid -- also known as hypothyroidism or hyperthyroidism.

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