AKT-4587

AKT-4587

A 29-year-old woman presents to the clinic with persistent vomiting and lethargy. She has lost 3 kg in weight over the past three weeks and is concerned because she is 14 weeks pregnant.

Upon examination, she appears thin, with a regular pulse of 80 and a blood pressure of 110/70 mmHg. There is no goitre or thyroid bruit, and her thyroid autoantibody status is negative.

Her lab results show a TSH level of 0.4 mU/L (0.5-6), T3 level of 7.0 pmol/L (3.4-7.2), and T4 level of 27 pmol/L (9-25).

What is the most likely diagnosis?