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Collaborative Hypertext of Radiology

Nervous system



subdural hematoma

  • incidence: 5% of head trauma patients
  • age: infants and elderly (large subarachnoid space with freedom to move)
  • cause: damage to subdural veins ("bridging veins")

  • acute subdural hematoma:
    • manifests hours after injury
    • hyperdense (<1 week); isodense (1-3 weeks); hypodense (3-4 weeks)
    • underlying brain injury (50%)
    • worse long term prognosis than epidural hematoma

  • chronic subdural hematoma
    • following minor injury; rarely parenchymal injury
    • convex configuration (unlike acute subdural)

  • interhemispheric subdural hematoma
    • most common acute finding in child abuse (whiplash injury)
    • predominace for posterior portion of interhemispheric fissure

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


Related CHORUS documents:
epidural hematoma
subarachnoid hemorrhage
battered child syndrome
asbestos lung disease
harlequin eye
paraesophageal hiatal hernia


Copyright © 2013, Charles E. Kahn, Jr.