23rd August 2024

A 32-year-old woman develops unilateral optic neuritis with full recovery

A 32-year-old woman develops unilateral optic neuritis with full recovery. An MRI brain is normal.

Investigations:

Anti-aquaporin 4 (NMO-IgG) antibodies Negative

Cerebrospinal fluid: white cell count 12/µL

oligoclonal bands Negative

What is the most likely diagnosis?

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