Teenage boy presents with hoarseness.

A male neonate with extremity and craniofacial deformities.

A 62-year-old man with a history of right craniectomy presents with headache, poor concentration, left-sided weakness, and facial droop.

A man presents with headache.

A previously healthy girl with progression (over several days) of multiple symptoms, including extremity pain, difficulty speaking, nausea, vomiting, progressive confusion, and altered mental status.

A man in his early 80s with confusion but no other neurological symptoms or deficits.

A 9-year-old girl with Crohn's disease, acute myeloid leukemia, and neutropenia presents with altered mental status.

A 9-year-old boy with recurrent episodes of right-sided numbness and weakness.and weakness.

A 9-month-old girl with abnormal head shape undergoing imaging evaluation.

An 8-year-old girl with headaches for the past several weeks and nausea and vomiting for the past several days.

An 89-year-old woman after a ground-level fall.

An 87-year-old man with acute-onset altered mental status beginning three hours before admission.

An 85-year-old woman with history of spinal stenosis.

An 85-year-old woman undergoing surveillance imaging after treatment for sinonasal squamous cell carcinoma.

An 83-year-old woman with diplopia for the past two months.

An 81-year-old woman with syncope and hearing loss.

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

An 80-year-old man with altered mental status and new-onset seizure one week after a fall.

A 7-month-old boy with increased head circumference.

A 79-year-old man with difficulty wandering, associated dysarthria, difficulty swallowing, deviation of the labial commissure, and right-sided weakness over the past 48 hours.