False Subarachnoid Hemorrhage in Anoxic Encephalopathy With Brain Swelling

The authors present two comatose patients with brain swelling from anoxic encephalopathy. Nonenhanced computed tomography (CT) images showed increased density on the falx, on the tentorium, and in the basal cisterns, all of which falsely suggested subarachnoid hemorrhage. Autopsy in both patients fa...

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Bibliographic Details
Published in:Journal of neuroimaging 2000-10, Vol.10 (4), p.236-238
Main Authors: Phan, Thanh G., Wijdicks, Eelco F. M., Worrell, Gregory A., Fulgham, Jimmy R.
Format: Article
Language:English
Subjects:
Aged
anoxic encephalopathy
Brain Edema - diagnosis
Brain Edema - diagnostic imaging
brain swelling
Cerebellum - diagnostic imaging
Cerebral Angiography
Cerebral Cortex - diagnostic imaging
Coma - diagnostic imaging
Computed tomography
Diagnosis, Differential
Fatal Outcome
Female
Humans
Hypoxia, Brain - diagnosis
Hypoxia, Brain - diagnostic imaging
Male
Middle Aged
pseudosubarachnoid hemorrhage
Subarachnoid Hemorrhage - diagnostic imaging
Tentorium
Tomography, X-Ray Computed
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Summary:The authors present two comatose patients with brain swelling from anoxic encephalopathy. Nonenhanced computed tomography (CT) images showed increased density on the falx, on the tentorium, and in the basal cisterns, all of which falsely suggested subarachnoid hemorrhage. Autopsy in both patients failed to show subarachnoid hemorrhage. In rare circumstances, anoxic encephalopathy can mimic subarachnoid hemorrhage on nonenhanced CT.
ISSN:1051-2284
1552-6569
DOI:10.1111/jon2000104236