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Test Details Test Includes Free thyroxine index; T3 uptake (THBR); thyroid-stimulating hormone (TSH); thyroxine (T4)

Test Details Synonyms Antithyroglobulin Antibody Use Detect and confirm autoimmune thyroiditis, Hashimoto thyroiditis

Test Details Synonyms Antimicrosomal Antibody Antithyroid Microsomal Antibody Use Differential diagnosis of hypothyroidism and thyroiditis

Test Details Test Includes Hematocrit; hemoglobin; mean corpuscular volume (MCV); mean corpuscular hemoglobin (MCH); mean corpuscular hemoglobin concentration (MCHC); red cell distribution width (RDW); percentage and absolute differential counts; platelet count (RBC); red cell count; white blood cell

Additional Information Reverse triiodothyronine (rT3) is an isomer of triiodothyronine (T3) with no demonstrated biological activity.1,2 The majority of rT3is produced through peripheral enzymatic monodeiodination of T4 at the 5 position of the inner ring of the iodothyronine nucleus of thyroxine (T4)

Test Details Synonyms Biotin Use Measurement of vitamin B7 level Additional Information Biotin is a colorless, water-soluble B-complex vitamin that is also referred to as vitamin B7.1-3 Biotin functions as a cofactor for five mammalian enzymes that catalyze specific carboxylation reactions

Test Details Synonyms A, Vitamin Retinol, Serum Use Differential diagnosis of hypervitaminosis A. A combination of a low serum carotene level and a low vitamin A suggests inadequate vitamin A nutrition.