Delta sign on CT is seen in?: (A) Gradenigo syndrome, (B) Subdural hematoma, (C) Extradural hematoma, (D) Sagittal sinus thrombosis
Answer is D. Ans. is 'd' i.e., Sagittal sinus thrombosis* The delta sign (or empty delta sign) is CT sign of dural venous sinus thrombosis of the superior sagittal sinus, where contrast outlines a triangular filling defect.