PAEA Surgery End Of Rotation (EOR) Practice Exam

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Prepare for the PAEA Surgery End Of Rotation Exam. Enhance your skills with quizzes containing flashcards and multiple choice questions, complete with hints and explanations. Master the exam now!

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What characteristic shape is seen on a CT scan of a subdural hemorrhage?

Lenticular
Crescent-shaped
Oval
Irregular

The correct answer is: Crescent-shaped

A subdural hemorrhage typically presents as a crescent-shaped collection of blood on a CT scan. This shape arises because the blood accumulates between the dura mater and the brain, creating a broad, thin layer that conforms to the contours of the underlying cerebral hemispheres. Unlike lenticular-shaped hematomas, such as epidural hemorrhages, which appear more bulging and well-defined, the crescent shape of a subdural hematoma reflects its spread along the surface of the brain, often crossing suture lines due to the nature of venous bleeding involved. The crescent shape is significant because it helps differentiate subdural hemorrhages from other types of intracranial hemorrhages, thereby guiding treatment decisions and expectations regarding the clinical course of the patient. Understanding this characteristic appearance is crucial for accurate diagnosis and management in surgical settings.