 MRI Brain: There is an unchanged round focus of increased T2 signal within the right transverse sinus. Additionally, there is unchanged increased T2 signal in the right proximal internal jugular vein. Prior CT venogram demonstrated no evidence of proximal right internal jugular vein thrombus. The ventricles and sulci are unchanged. The cisterns remain patent. There is no midline shift or mass effect. There are no areas of pathological enhancement. There is no diffusion abnormality. No extra-axial fluid collection is identified. The midline structures and craniocervical junction are within normal limits. There is deformity of the bilateral globes.MRV Brain: There is unchanged round filling defect in the right transverse sinus, most compatible with an arachnoid granulation. The superior sagittal sinus, inferior sagittal sinus, transverse sinuses, sigmoid sinuses, straight sinus, vein of Galen, internal cerebral veins, and several visualized cortical veins are patent.
1. No convincing evidence of dural venous sinus thrombosis on this study. 2. Increased T2 signal in the right proximal internal jugular vein can be seen with slow flow normally or possibly related to internal jugular vein occlusion more inferiorly in the neck. Doppler ultrasound can be considered if clinically indicated.3. Unchanged round focus of increased T2 signal within the right transverse sinus is most compatible with an arachnoid granulation.