Question

A 35‑year‑old woman presents with heat intolerance, weight loss, tremor and palpitations. Examination shows a diffusely enlarged, non‑tender goitre and lid lag. TSH is suppressed and free T4 is elevated. Which additional test best helps to confirm the underlying cause?

Accepted Answer

TSH receptor antibodies

Answer

Serum anti‑thyroid peroxidase antibodies

Answer

Thyroid ultrasound

Answer

Serum calcitonin

Answer

Fine‑needle aspiration of the thyroid

Practice question

A 35‑year‑old woman presents with heat intolerance, weight loss, tremor and palpitations. Examination shows a diffusely enlarged, non‑tender goitre and lid lag. TSH is suppressed and free T4 is elevated. Which additional test best helps to confirm the underlying cause?