Figure 5-3.

A young woman with headache. A, Magnetic resonance venogram (MRV) showing an extensive thrombosis throughout the posterior two-thirds of the superior sagittal sinus, involving the torcular herophili, straight sinus, the right transverse and sigmoid sinuses, and extending inferiorly into the right internal jugular vein (arrows). The left transverse and sigmoid sinuses and left internal jugular veins are spared. B, MRV (sagittal view) showing the thrombosis of two-thirds of the superior sagittal sinus, involving the torcular herophili and the straight sinus (arrow). C, MRV at 1 year showing complete recanalization of the previously thrombosed sinuses.