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Collaborative Hypertext of Radiology

Nervous system



epidural hematoma

  • 2% of all serious head injuries
  • uncommon in infants
  • associated with skull fracture in 40-85%

  • mechanism of injury:
    • laceration of dural vessels from calvarium fracture (91%)
    • avulsion of venous vessels from points of calvarial perforations
    • disruption of dural sinuses (major cause in kids)

  • transient loss of consciousness; lucent interval
  • 3rd nerve palsy (sign of cerebral herniation)
  • somnolence 24-96 hrs after accident (medical emergency)

  • types:
    • acute (58%) from arterial bleeding
    • subacute (31%)
    • chronic (11%) from venous bleeding

  • location:
    1. temporoparietal (66%): middle meningeal artery tear
    2. frontal pole, parieto-occipital region, between occipital lobes, posterior fossa: laceration of venous sinuses

Yong H. Hahn, MD  -  2 February 1995
Last updated:  1 October 2013


Related CHORUS documents:
subdural hematoma
subarachnoid hemorrhage
bulging disc
large pleural effusion
basal ganglia calcification
tuberous sclerosis (Bourneville disease)


Copyright © 2013, Charles E. Kahn, Jr.