Post-traumatic tension pneumocephalus
Head trauma with loss of consciousness.
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Acute EDH is also noted at right middle cranial fossa, which was associated with a fracture of the right squamous of temporal bone which is extended to the wing of sphenoid bone. Fracture is also noted at left frontal bone.
Tension pneumocephalus is a neurosurgical emergency that occurs when subdural air causes a mass-effect over the underlying brain parenchyma, often from a ball-valve mechanism with one-way entry of air into the subdural space.