Acute subdural hematoma
Pedestrian hit by car. Decreased consious state.
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An 11 mm left frontal subdural hematoma effaces the cortical sulci and results in 2 mm of subfalcine herniation. A smaller subdural hematoma in the left anterior temporal fossa measures 7 mm.
Right temporal lobe hemorrhagic contusion is associated with sulcal subarachnoid blood and a thin (2 mm) subdural hematoma.
No intraventricular blood. No transtentorial or tonsillar herniation. Grey white matter differentiation is preserved, with no evidence of acute ischemia.
In young patients acute subdural hematomas are usually seen in the setting of significant head trauma, usually with associated hemorrhagic contusions.