Data
Clinical presentation: A 39-year-old man has been treated for hyperthyroidism for 6 months by methimazole. Neither the TSAb nor the aTPO level was increased. He noticed fatigue and 7 kg weight gain in the previous weeks.
Palpation: a firm nodule in the right lobe.
Laboratory test: TSH 0.04 mIU/L, FT4 5.53 pM/L, FT3 2.29 pM/L on daily 10 mg methimazole.
Lesion in question:
in the upper ventrolateral part of the right lobe.