Endocrine Abstracts

Introduction: Despite being on adequate amounts of levothyroxine (>1.6 μg/kg) some patients still exhibit biochemical evidence of inadequate replacement (serum TSH >4.2 mIU/l±free-thyroxine (FT4) <12 pmol/l). We report the use of a 5-day absorption test for assessing levothyroxine absorption in such a patient.Case: A 35-year-old female with hypothyroidism since 2007 had a serum TSH ranging from 4.48 to 54.9 mIU/l and FT<s...