Acute subdural haemorrhage

Case contributed by A.Prof Frank Gaillard


Fall from bike.

Patient Data

Age: 25 years
Gender: Male

The left frontal subdural haematoma measures 10 mm in depth and mildly effaces the subjacent left frontal lobe sulci. Small volume adjacent subarachnoid blood. There is 4 mm of midline shift towards the left at the level of the septum pellucidum. Subdural haematoma also noted at the posterior falx cerebri and extending onto the left tentorium cerebelli, measuring 3 mm. A 6 x 5 mm hyperdense focus in the left occipital lobe is compatible with a small haemorrhagic contusion. No hydrocephalus. No intracranial mass. No skull fractures are noted, although a bone algorithm reconstruction has not been performed on the study.


Using subdural windows (e.g. width: 250-400; level: 40) makes the acute blood easily distinguishable from the adjacent bone. 

Case Discussion

Reviewing all CT brains on "brain window", "bone window" and "subdural window" is an important habit and will allow you to see lesions which are otherwise subtle or invisible on single "brain window" setting. 

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Case information

rID: 29011
Published: 27th Apr 2014
Last edited: 5th Feb 2018
Inclusion in quiz mode: Included