A young man is brought to the trauma unit after being struck…
A young man is brought to the trauma unit after being struck on the side of the head. He briefly lost consciousness, regained it, and then rapidly deteriorated. CT reveals a lens-shaped (biconvex) hematoma. Which meningeal layer and space are involved in this condition?
Read DetailsA 72-year-old man presents to the emergency department after…
A 72-year-old man presents to the emergency department after a fall. He was initially alert but became progressively drowsy over several hours. CT scan shows a crescent-shaped collection of blood over the cerebral hemisphere, not crossing the midline. This hematoma is most likely located in which of the following spaces?
Read DetailsA 6-year-old boy presents with headache, nausea, and papille…
A 6-year-old boy presents with headache, nausea, and papilledema. MRI reveals enlargement of the lateral and third ventricles, but the fourth ventricle appears normal. Which of the following structures is most likely obstructed?
Read DetailsA 5-year-old child falls from a swing and hits the back of h…
A 5-year-old child falls from a swing and hits the back of his head. He remains conscious but develops vomiting and headache. CT reveals a linear occipital bone fracture and a lens-shaped extradural bleed. Which vessel is most likely responsible for this hemorrhage?
Read DetailsA 45-year-old patient presents with a fracture involving the…
A 45-year-old patient presents with a fracture involving the cribriform plate, leading to cerebrospinal fluid rhinorrhea. The physician is concerned about potential intracranial infection due to the open communication between the nasal cavity and the cranial vault. This structure is located in which cranial fossa and part of which bone?
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