The result of a thyroid uptake test could be abnormally increased or decreased.
In the usa, the normal thyroid uptake range is approximately 10-30% at 24 hours. An increased result may be due to various reasons including: grave's disease, multinodular toxic goiter
or hashitoxicosis. A decreased uptake could be due to subacute thyroiditis, iodine
induced thyrotoxicosis among others.