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T3 Radioimmunoassay - T3


Results and Values

What do the test results mean?

The amount of T3 in blood normally ranges from 100 to 200 nanograms per deciliter (ng/dL).

Abnormally high levels of T3 may indicate the following:

  • hyperthyroidism, or an overactive thyroid
  • T3 thyrotoxicosis, a condition in which the body tissues are exposed to excessive amounts of T3
  • thyroid cancer
  • thyroiditis, which is an inflammation of the thyroid
  • Abnormally low levels of T3 may indicate the following:

  • chronic illness
  • Hashimoto''s disease, an autoimmune disorder in which the body attacks its own thyroid gland for no known reason
  • hypothyroidism, or an underactive thyroid
  • starvation

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