For patients with optic neuritis who have an increased risk of developing MS (on the basis of an abnormal brain MRI), many studies support the early use of medications aimed to reduce the risk of MS.
1 The normal size of the thyroid gland in adults is 4 to 4.8 cm x 1.0 to 1.8 cm x 0.8 to1.6 cm. 2  Its normal weight ranges between 15-25 grams.3  The weight of this gland grows heavier in women. 4  It escalates up to 50% during the early part of the menstrual cycle.imension & Weight Of Thyroid Gland. 1  The normal size of the thyroid gland in adults is 4 to 4.8 cm x 1.0 to 1.8 cm x 0.8 to1.6 cm.
Normal Reference Ranges for Thyroid Lab Tests. The diagnosis of a hyperactive or hypoactive thyroid is confirmed by a physical examination and laboratory tests. The thyroid test measures the levels of T3, T4, and TSH. Learn about these hormones and know what the normal thyroid lab test reference range is. 1  slide 1 of 4. The Thyroid Gland The thyroid gland is part of the endocrine system and is located in the front of the neck. 2  slide 2 of 4.