Evaluation of petrosal sinus patency with 3-dimensional contrast-enhanced magnetic resonance venography in petroclival meningiomas for surgical strategy

Cerebral venous anatomy is a challenge to display with noninvasive methods because of flow dynamics, and CE 3D imaging seems to be the modality of choice to evaluate the variational anatomy and patency, which is essential in petroclival meningiomas. Because the cavernous sinus drains into either IPS or SPS, the patent sinus should be protected in surgery if there is tumoral occlusion of the others.