Endocrine Abstracts

Many causes of levothyroxine malabsorption have been described in the literature such as celiac disease, giardiasis, severe liver cirrhosis and drug interactions. A 27-year-old woman admitted to our institution with overt hypothyroidism symptoms. She had total thyroidectomy for thyroid papiller carcinoma and was using 400 μg/day levothyroxine (LT4). Her serum free thyroxine (fT4), free triiodothyronine (fT3) and thyrotropin stimulating hor...