Post-traumatic diffuse cerebral edema
Comatous patient after motor vehicle accident (MVA).
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Noncontrast CT shows diffuse hypodensity of the bilateral cerebral hemispheres with loss of white-gray matter differentiation suggesting diffuse cerebral edema. The lateral and third ventricles are slit-like, there is diffuse effacement of the cerebral sulci (pseudo-SAH).
No intraparenchymal or subdural hematoma was noted.
Posterior fossa and brainstem are unremarkable.
This case shows classical CT findings of diffuse brain edema.