A 48-year-old man with worsening confusion, lethargy, and garbled speech.

A 51-year-old-woman with fever, cough, and severe neurological deficits.

A 31-year-old woman with migraines and numbness in her fingers and toes.

A 69-year-old man with vertigo.

A 70-year-old man with dizziness and gait changes over the past week.

A 39-year-old woman with hypertension and new-onset seizures.

A 57-year-old woman with a history of lung cancer presents with headaches, left-sided weakness, and an acute decline in mental status.

A 4-year-old girl with a history of gelastic seizures.

A 26-year-old man with bilateral sensorineural hearing loss.

A 65-year-old man with left facial swelling for the past several days.

A 52-year-old man struck by an automobile while crossing the street.

A 55-year-old woman presents after a syncopal episode after initiation of a therapeutic epidural injection.

A 65-year-old woman with fever, vomiting, diarrhea, and rapidly declining level of consciousness.

A 23-year-old woman with a central nervous system inflammatory condition presents with recurrent headaches.

A 3-month-old infant born prematurely at 34 weeks presents with microcephaly.

A 41-year-old man with worsening headache, mental status change, balance issues, blurred vision, and progression of numbness.

A 70-year-old woman with right-sided enophthalmos.

A 19-year-old woman with fever, fatigue, and right neck mass.

A man presents with headache.

An 11-year-old boy with mental status changes.