Lipid Definition Lipids are class of naturally-occurring organic compounds that you may know by their common names: fats and oils. A key characteristic of this group of compounds is that they are not soluble in water.
Ultrasound. 1  normal thyroid gland has an homogenous appearance, the capsule may appear as a thin hyperechoic line. 2  each lobe normally measures 4 length: 4-7 cm. depth: <2 cm. 3  volume (excluding isthmus, unless its thickness is > 3mm) 6 10-15 ml for females. 12-18 ml for males.
The TSH Reference Range. As of 2017, at most laboratories in the U.S. the official reference range for the TSH test runs from approximately 0.5 to 4.5 or 5.0 (mIU/L). A patient whose TSH level is within the reference range is referred to as euthyroid, and is considered to have normal thyroid function. The reference rangeâalso sometimes called the normal rangeâis an important part of your overall thyroid diagnosis and treatment program, because the conventional endocrinology world considers it to be key to diagnosis and management of thyroid function.