MVA, he patient was hiding a motorcycle.
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Non-contrast CT Brain showing an extensive fracture of the frontal and right temporal bone with minimal displacement of the inner diploe in the frontal region (1,8mm). There is an associated right frontotemporal extradural haematoma that causes mass effect over the adjacent brain and midline shift. Small foci of cerebral contusion are seen on the right frontal lobe. A subgaleal haematoma is also present along the right frontotemporal portion of the calvaria.
This case shows the classic appearance of an acute extradural haemorrhage in a young patient involved in a head strike. This haematoma represents a collection of blood that forms between the inner surface of the skull and outer layer of the dura (which is the periosteum), it is a subperiosteal haematoma located on the inside of the skull.
The patient was submitted to a prompt neurosurgery evacuation of the haematoma.