A 67-year-old man with a history of B-cell lymphoma presents for restaging PET/CT scan.

A 45-year-old man with fevers, subacute memory problems, and tremor.

A 32-year-old woman with migraines.

A 17-day-old female infant with failure to thrive and cardiomegaly.

A 14-year-old boy undergoing imaging after cardiac arrest and house fire.

A 47-year-old woman with progressive numbness, hearing loss, vision changes, dysphagia, and nausea/vomiting over the past two months.

A 22-year-old man with recurrent dystonia and dysphagia.

A 49-year-old woman with rapidly progressive altered mental status.

An 18-month-old girl with developmental delay presents with new-onset seizures.

A 13-year-old boy presents with progressive left eye blindness.

A 37-year-old woman with worsening lethargy, mental status change, and incontinence after a fall.

A 30-year-old man with slow cognitive decline and development of a spastic gait.

A 58-year-old woman with new-onset hearing loss, otalgia, and tender external auditory canals.

A 66-year-old woman with a viral illness, mental status changes, and decerebrate posturing.

A 36-year-old woman with worsening headaches, blurry vision, and arm weakness.

A 30-year-old woman with vertigo.

A 47-year-old woman with altered mental status after collapsing at home.

A 73-year-old woman with a persistent, dull headache after having a metastasis resected.

An 80-year-old woman undergoing resection of a transosseous mass of the right frontal bone.

A 46-year-old man with sudden-onset altered mental status.