A 55 year old lady complains of worsening dizziness and diplopia for the last 3 weeks, and now is unable to walk steadily. There is no history of trauma, fever, or constitutional symptoms.

Her medical history is unremarkable and she is not on any medications. Both her mother and a maternal aunt were diagnosed with unilateral ovarian malignancies in their mid-50s.

Her diet is balanced, and she does not drink, smoke or use recreational drugs.