30th April 2024

A 30-year-old woman presents with a 3-month history of persistent headaches, worse in the morning and associated with transient visual obscurations.

A 30-year-old woman presents with a 3-month history of persistent headaches, worse in the morning and associated with transient visual obscurations. She denies any history of trauma or systemic illness. Her BMI is 35, and she is on no medication. On examination, she has no neurological deficits, but fundoscopy reveals bilateral papilloedema.

Which investigation is most likely to confirm the diagnosis?