13th August 2020

A 67-year-old male with known neurofibromatosis 2 presents with a recent onset cranial nerve VI disorder

A 67-year-old male with known neurofibromatosis 2 presents with a recent onset cranial nerve VI disorder, as well as increasingly worsening headaches. Given his medical history and clinical features, a diagnosis is postulated. 

Select the SINGLE most appropriate investigation from the list below which would aid in confirmation of this diagnosis. Select ONE option only.