A 24-year-old male had a headache, malaise, and low-grade fever for the past 4 days. He was brought to the emergency room this morning after he started behaving in an unusual manner and experienced difficulty in speaking. While he was being transported, he suffered a generalized seizure. Physical examination showed a fever of 103°F and total disorientation. Deep tendon reflexes were exaggerated and the plantar response was bilaterally extensor. He had mild neck stiffness and the optic fundi showed early papilledema. A lumbar puncture produced clear CSF under an opening pressure of 300 mm H2O. Protein was 160 mg/dL, glucose 66 mg/dL (blood glucose 90 mg/dL), and there were 32 mononuclear cells/μL. No PMNs were present. Which of the following is the most likely cause of this man’s condition?
herpetic meningoencephalitis
glioblastoma multiforme
meningioma
meningococcal meningitis
spontaneous cerebral hemorrhage
subarachnoid hemorrhage