Results The results showed that serious peritumoral edema were easily caused by large and middle sized meningioma near the big drainingvein or venous sinus, and by an…
MR-DSA failed to depict 1 intranidal aneurysm and missed 1 less dilated artery and drainingvein after embolization respectively, which were demonstrated clearly by 3D-CEMRA confirmed with DSA.
MRA could show the general portrait of CVM and the direction of veindraining, though the number of medullary veins on MRA was less than that seen on enhanced MRI.