Cord sign – refers to cord-like hyperattenuation with a dural…

Cord sign refers to cord-like hyperattenuation with a dural venous sinus on non-contrast enhanced CT of the brain due to dural venous sinus thrombosis. The sign is most commonly seen with the transverse sinus (as in this case, red arrow) because it runs along the origin of the tentorium approximately in the axial plane such that it is visible on one image. CT venogram in this case confirmed thrombosis (blue arrow).

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