A 48-year-old man comes to the clinic with symptoms of ...

It is fixed and placed with swallowing. The remainder of his examination is normal. Radioactive iodine thyroid scintiscanning reveals that the nodule is "cold". Thyroid function tests show TSH 1.14 mU/mL, T3 134 nmol/L, thyroxine 8 nmol/L. The most appropriate next step is to. Top of Form ................
................