21st February 2025

A 72-year-old woman is brought to hospital following a fall.

A 72-year-old woman is brought to hospital following a fall. She reports a 1-week history of vertigo, nausea and increasing instability prior to the fall. On examination, she is noted to be ataxic with abnormal eye movements. A chest X-ray carried out in A&E demonstrates a spiculated lung nodule suspicious for malignancy. 

Which of the following pathologies is most likely to be found on biopsy?

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