Acute subdural haemorrhage

Case contributed by A.Prof Frank Gaillard


Fall from bike.

Patient Data

Age: 25
Gender: Male
Modality: CT

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. Seen amount of subdural haematoma also noted at the posteriorly 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.

Modality: CT

Using subdural windows (e.g. width: 250-400; level: 40) make the acute blood easily distinguishable form 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
Case created: 26th Apr 2014
Last edited: 16th Apr 2017
Inclusion in quiz mode: Included

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