Question

A 32-year-old woman presents with weight loss, anxiety, heat intolerance, and palpitations. Blood tests show: TSH <0.01 mU/L (0.4-4.0), Free T4 28 pmol/L (9-22). What is the most appropriate next investigation to determine the underlying cause?

Accepted Answer

TSH receptor antibody (TRAb) measurement

Answer

Thyroid ultrasound scan

Answer

Thyroid peroxidase antibody (TPO) measurement

Answer

Radioactive iodine uptake scan

Answer

Fine needle aspiration cytology

Practice question

A 32-year-old woman presents with weight loss, anxiety, heat intolerance, and palpitations. Blood tests show: TSH <0.01 mU/L (0.4-4.0), Free T4 28 pmol/L (9-22). What is the most appropriate next investigation to determine the underlying cause?