21st February 2025

A 62-year-old man has a 1.5 cm lung nodule identified incidentally on a CT chest, which is biopsied to confirm lung adenocarcinoma.

A 62-year-old man has a 1.5 cm lung nodule identified incidentally on a CT chest, which is biopsied to confirm lung adenocarcinoma. No lymphadenopathy is identified on the original CT chest, and no distant metastases are noted on a CT-PET. The patient has a history of hypertension and hypothyroidism, for which he takes amlodipine, losartan and levothyroxine. He is an ex-smoker with a 20-pack-year smoking history.

Which additional test is most important in assessing suitability for radical surgery?

Select the SINGLE most appropriate option from the list below. Select ONE option only.