Worsening Stroke Symptoms in an 80-Year-Old Man

An 80-year-old man presented to the hospital with new-onset slurred speech and left-sided facial droop. Magnetic resonance imaging scans of the head were visually interpreted to show an acute infarct involving the posterior right frontal lobe. What is your diagnosis?
Source: JAMA Neurology - Category: Neurology Source Type: research