Pseudo-Subarachnoid Hemorrhage: A Potential Imaging Pitfall Associated with Diffuse Cerebral Edema
Curtis A. Given, IIa,
Jonathan H. Burdettea,
Allen D. Elstera and
Daniel W. Williams, IIIa
a From the Departments of Neuroradiology (C.A.G., J.H.B., D.W.W.) and Radiology (A.D.E.), Wake Forest University Baptist Medical Center, Winston-Salem, NC
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FIG 1. Case 1. Axial nonenhanced CT images through the basal cisterns.
A, Image obtained before contrast enhancement reveals abnormally increased attenuation within the basal cisterns (arrows).
B, The basal cisterns (arrowheads) are enhancing after the intravenous administration of contrast material.
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FIG 2. Case 6. Axial nonenhanced CT images through the basal cisterns.
A, Image reveals effacement of and increased attenuation within the basal cisterns (arrowheads).
B, The findings were not present on the prior image obtained approximately 3 days earlier.
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