E-Pearl of the Week: The Empty Delta Sign

December 12, 2011

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December 12, 2011

The Empty Delta Sign

The empty delta sign may be seen on a contrast-enhanced computed tomographic (CT) scan of the brain in a patient with sagittal sinus venous thrombosis. The sign consists of a triangular area of enhancement or high attenuation with a relatively low-attenuating center on multiple contiguous transverse CT images obtained in the region of the superior sagittal sinus. This has been reported in approximately 28% of patients with superior sagittal sinus thrombosis.

Reference
1. Virapongse C, Cazenave C, Quisling R, Sarwar M, Hunter S. The empty delta sign: frequency and significance in 76 cases of dural sinus thrombosis. Radiology 1987; 162:779-785.

Submitted by: Vijayamala Bondugula, MD
Disclosures: Dr. Bondugula reports no disclosures.

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