7th June 2023

A 52-year-old woman is admitted to the stroke ward with right-sided weakness

A 52-year-old woman is admitted to the stroke ward with right-sided weakness. She initially experienced weakness of her right hand, which progressed to affect her entire right upper limb and the right side of her face. Her initial CT brain was normal. Shortly after the motor weakness, she developed a left-sided throbbing headache and reported seeing shimmering lights in her the peripheries of her visual fields. There is no papilloedema on fundoscopy. She suffers from hypertension and is on the oral contraceptive pill.

Which of the following options is the most likely diagnosis?