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