A 32-year-old woman presents with weight loss, heat intolerance and palpitations. Examination shows fine tremor, diffuse goitre and bilateral lid retr...

Question

A 32-year-old woman presents with weight loss, heat intolerance and palpitations. Examination shows fine tremor, diffuse goitre and bilateral lid retraction. TSH is undetectable and free T4 markedly elevated. Which investigation best confirms the aetiology of her thyrotoxicosis as Graves disease?

Accepted Answer

TSH receptor antibody assay

Answer

Thyroid ultrasound

Answer

Radioiodine uptake scan showing toxic multinodular goitre

Answer

Serum calcitonin level

Answer

Fine needle aspiration of the thyroid

au-amc MCQ (SBA): Graves disease diagnosis

A 32-year-old woman presents with weight loss, heat intolerance and palpitations. Examination shows fine tremor, diffuse goitre and bilateral lid retraction. TSH is undetectable and free T4 markedly elevated. Which investigation best confirms the aetiology of her thyrotoxicosis as Graves disease?