Epidural Hematoma

  • Etiology: traumatic coup injury, tearing of middle meningeal artery / diploic veins / dural sinus results in blood between inner skull and outer dura
  • Imaging: biconvex shape, doesn’t cross suture, crosses tentorium + falx, skull fracture in only 40% due to plinacy of skull
  • Note: can occur infratentorial as well as supratentorial
  • Clinical: lucid interval

Cases of Epidural Hematoma

CT of subgaleal hematoma
Axial CT without contrast of the brain shows a high density fluid collection in the left frontal subcutaneous tissue. There is also an underlying lentiform mixed density intracranial fluid collection.
CT of epidural hematoma
Axial CT without contrast of the brain shows a right frontal high density biconvex intracranial extra-axial fluid collection.
CT of epidural hematoma
Axial CT without contrast of the brain shows a mixed density biconvex intracranial extra-axial fluid collection posterior to the left cerebellum.