FIG 2. Case 2.

A, E, Plain CT scan showing a bihemispheric subarachnoid hemorrhage, predominating in the left insular sulci.

B, F, FLAIR images (9800/152/2300/1) showing hyperintensities within the subarachnoid spaces.

C, FLAIR images (9800/152/2300/1) showing absence of signal changes in the basal cisterns and revealing a hyperintensity within the left transverse sinus (arrow).

G, T2-weighted image (7000/86.3/2) in the frontal plane confirming the presence of a hypersignal within the left transverse and superior sagittal sinuses (arrows), raising the suspicion of sinus thrombosis.

D, H, Venous phase of the digitized subtracted angiogram (A–P views) of the left carotid (D) and the left vertebral (H) arteries confirming the occlusion of the left transverse and superior sagittal sinuses. The right transverse sinus is not seen medially but fills laterally from venous collaterals and drains into the right sigmoid sinus.