Patient falls headlong from 2 meters
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Computed tomography shows extensive linear fracture at the vertex of the skull involving the sagittal suture. Below this, there is a large biconvex collection of blood displacing the superior sagittal sinus inferiorly and compressing the underlying parenchyma.
The findings described are consistent with a traumatic epidural hematoma due to venous bleeding from the superior sagittal sinus. Note, that unlike most extradural haematomas, this bleed crosses the superior sagittal suture as the periosteal layer of the dura is disrupted by the fracture.