• Can J Neurol Sci · Feb 1999

    Case Reports

    Pseudo-subarachnoid hemorrhage: a rare neuroimaging pitfall.

    • M al-Yamany, J Deck, and M Bernstein.
    • Division of Neurosurgery, Toronto Hospital, Ontario, Canada.
    • Can J Neurol Sci. 1999 Feb 1; 26 (1): 57-9.

    ObjectiveWe report an unusual case of the CT appearance of diffuse subarachnoid hemorrhage in a patient with anoxic encephalopathy, a situation which neurosurgeons, neurologists, and neuroradiologists should be aware of.Clinical PresentationA young man collapsed unconscious in jail after abusing an unknown quantity and variety of drugs. CT scan showed a picture compatible with diffuse subarachnoid hemorrhage.InterventionAs the patient had a Glasgow Coma Score of 3 no heroic intervention was undertaken. An autopsy performed 40 hours after the initial ictus and 24 hours after death revealed no evidence of subarachnoid hemorrhage but gross and microscopic evidence of anoxic encephalopathy.ConclusionAnoxic encephalopathy can mimic diffuse subarachnoid hemorrhage on CT.

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