Epidural Hematoma

Etiology: arterial bleed from middle meningeal artery
Imaging: biconvex shape, doesn’t cross suture, crosses tentorium + falx, skull fracture often absent
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.