Review Question - QID 214278

A 41-year-old woman presents to the emergency department with a 1-day history of double vision. She says that she noticed the double vision as soon as she woke up and that when it did not go away for 1 hour she decided to come to the emergency department for evaluation. She has also been getting increasingly severe headaches over the last 3 months; however, she thought that these were simply due to the stress of her job. She also reports intermittent ringing in her ears that occurs once every few weeks. Imaging reveals a mass in the brain, and biopsy shows the findings seen in Figure A. The tumor seen in this patient most likely arose from which of the following cells?