Technique: Multiplanar, multisequence imaging has been obtained through the brain including post contrast images and MRV.
Findings: No intra or extra-axial abnormality, mass, or collection. Ventricles and basal cisterns are normal in appearance. No abnormal enhancement. Cerebral venous sinuses, deep and superficial cerebral veins appear normal, with no signs of new venous thrombosis, although the calibre of the anterior two thirds of the superior sagittal sinus remains reduced. Flow is demonstrated in this region on phase contrast MRV. Within the left frontal lobe are numerous prominent transmedullary veins which drain into the internal cerebral veins on the left. These presumably represent enlarged collateral drainage pathways, and no abnormal arteries are demonstrated in the region (middle cerebral, middle meningeal or superficial temporal arteries) to suggest the presence of a dural arteriovenous venous fistula, however continued followup is recommended. On future imaging a MR angiogram would be of benefit.