Delta-sign is seen in-
Correct Answer: sigmoid sinus thrombosis
Description: (Refer: PL Dhingra, Diseases of Ear, Nose & Throat, 7th edition, pg no. 92)
Contrast-enhanced CT scan can show sinus thrombosis by typical delta-sign. It is a triangular area with rim enhancement, and central low density area is seen in posterior cranial fossa on axial cuts
Delta-sign may also be seen on contrast enhanced MRI
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