Review Question - QID 216693

A 44-year-old woman presents to the emergency room after having a seizure at work. She has no past medical history and has never had a seizure before. She has a medical history of migraine headaches which she manages with acetaminophen and ibuprofen. She notes her headaches have been worsening lately. She does not smoke and drinks alcohol on social occasions. Her temperature is 99°F (37.2°C), blood pressure is 110/80 mmHg, pulse is 94/min, respirations are 12/min, and oxygen saturation is 98% on room air. Physical exam reveals normal strength and sensation of her upper and lower extremities. The patient walks with a steady gait and her cranial nerves are grossly intact. A head CT is obtained and is shown in Figure A. Which of the following is the most likely diagnosis?