USMLE STEP 3 MCQ 12 : Identify?

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Question:

a) acute extradural hematoma
b) sub-acute acute extradural hematoma
c) acute subarachnoid hematoma
d) subacute subdural hematoma
e) acute subdural hematoma

Correct Answer: D

Explanation:

Subdural hematomas which become symptomatic between 3 days and 3 weeks after initial injury are considered subacute. Compared to the normal brain parenchyma, subacute subdural hematomas appear isodense to low density. These collections may be subtle, especially if they are bilateral. Medial displacement of the gray-white matter interface is an important finding to identify.


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