Endocrine Abstracts

Introduction: The thyroxine absorption test (TAT) is well established to investigate persistently raised TSH in patients on L-thyroxine. We review our experience with this test.Method: Blood was taken for baseline FT4, FT3, TSH measurements and malabsorption screen. A week’s supply of L-thyroxine (1.6 mcg/kg×7) was administered orally under direct supervision and FT4 and TSH measured 2 h later. Patients continued o...

Aim: To investigate the relationship between baseline and stimulated cortisol responses in relation to the habitual time of rising and time of test.Method: The self-reported habitual rising time and time of cortisol testing were recorded in 63 consecutive patients (47F, 17M, age 18–94) undergoing standard stimulation testing with tetracosactide (SynActhen) 250 μg i.v. In total, 75 tests were analysed. A normal response was defined as a 30 min p...