TSH FT4 FT3 Initial test at presentation 0.2 mIU/L 283 nmol/L 3.7 nmol/L Reference range 0.5–6.5 mIU/L 65–175 nmol/L 1.0–3.25 nmol/L Follow-up test on carbimazole <0.005 mIU/L 17.5 pmol/L 5.5 pmol/L Reference range 0.27–4.2 mIU/L 12–22 pmol/L 3.9–6.7 pmol/L TSH: Thyroid-Stimulating Hormone; FT4: Free Thyroxine; FT3: Free Triiodothyronine

Table 1: Thyroid function tests performed at first presentation in Thyroid Clinic (TC), and on follow-up visit, both done while patient was still on carbimazole.