Traumatic subarachnoid haemorrhage

Mr Andrew Murphy and Dr Henry Knipe et al.

Traumatic subarachnoid haemorrhage (TSAH) is a common injury, and trauma is the most common cause of subarachnoid haemorrhage (SAH). 

TSAH occurs in ~35% (range 11-60%) of traumatic brain injuries 1

TSAH is most commonly seen in the cerebral sulci than in the Sylvian fissure and basal CSF cisterns 1. When in the basal cisterns, it has an affinity for the quadrigeminal cistern and ambient cistern 2. TSAH is also commonly seen adjacent to skull fractures and cerebral contusions 3

CT is considered the best modality for detection of TSAH due to its high sensitivity and ready availability. MRI is less sensitive for detecting subarachnoid haemorrhage, even with SWI 1. Please see main subarachnoid haemorrhage article for further details. 

TSAH has a better prognosis than aneurysmal SAH 2

  • aneurysmal SAH: can be difficult to delineate from TSAH 3
Stroke and intracranial haemorrhage
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Article information

rID: 43479
Section: Pathology
Synonyms or Alternate Spellings:
  • Traumatic subarachnoid haemorrhage (TSAH)

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Cases and figures

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    Case 2
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    Case 3: with falx cerebri subdural haematoma
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