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 reference rangeâalso sometimes called the normal rangeâis an important part of your overall thyroid diagnosis and treatment program, because the conventional endocrinology world views it as the gold standard measurement of your thyroid function. 1  A patient whose TSH level is within the reference range is referred to as euthyroid..