A 5-year-old boy is brought to the emergency room with fever, vomiting, and convulsions. The patient is febrile to 39.5°C (104°F). Physical examination reveals cervical rigidity and pain in the neck...

A 5-year-old boy is brought to the emergency room with fever, vomiting, and convulsions. The patient is febrile to 39.5°C (104°F). Physical examination reveals cervical rigidity and pain in the neck and knees. Acute inflammation most likely involves which anatomic region of the patient’s brain?

(A) Choroid plexus

(B) Ependyma

(C) Hypothalamus

(D) Lateral ventricles

(E) Leptomeninges