PAEA Surgery End Of Rotation (EOR) Practice Exam

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What are the CT findings of an epidural hematoma?

Crescent-shaped hematoma
Lenticular or lens-shaped hematoma
Irregular mass
Diffuse bleeding

The correct answer is: Lenticular or lens-shaped hematoma

The CT findings of an epidural hematoma are characterized by a lenticular or lens-shaped hematoma. This specific shape arises because the hematoma forms between the inner table of the skull and the dura mater, which allows it to expand outward and take on a convex shape that is limited by sutures. The lenticular appearance is due to the hematoma's accumulation of blood, typically resulting from tearing of the middle meningeal artery following a skull fracture. This distinguishes it from other types of hematomas, such as subdural hematomas, which typically present as crescent-shaped collections on CT scans as they spread along the surface of the brain. Understanding the geometry and location of the hematoma on imaging is crucial for diagnosis and management of head injuries, as it informs the urgency of surgical intervention and helps to assess the potential for increased intracranial pressure.