23rd May 2025

A 40-year-old male presents to GP with headache, changes to his vision, fatigue, loss of libido, muscle loss and a reduction in body hair for the last 1 year.

A 40-year-old male presents to GP with headache, changes to his vision, fatigue, loss of libido, muscle loss and a reduction in body hair for the last 1 year. He has not changed his exercise regime or diet. His visual field defect was identified to be a bi-temporal hemianopia.

What are the most appropriate investigations to diagnose the most likely pathology?

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