Diploic vein as a newly treatable cause of pulsatile tinnitus: A case report

Figure 1 Preoperative axial views of high-resolution computed tomography venography of the diploic vein. A: The cephalic diploic vein (orange arrow) runs in the parietal bone; B: The middle portion (orange arrow) runs in the parietal bone; C: The caudal portion (orange arrow) passes through the mastoid air cells posteriorly in a dehiscent canal (blue arrows); D: The caudal portion (orange arrow) courses into the transverse-sigmoid sinus.

Figure 2 Preoperative images of the diploic vein. A: Anteroposterior image of digital subtraction angiography; B: Lateral image of magnetic resonance venography.

Figure 3 Preoperative four-dimensional flow magnetic resonance view of the caudal diploic vein and adjacent transverse sinus and sigmoid sinus. DV: Diploic vein; SS: Sigmoid sinus; TS: Transverse sinus; A: Anterior; P: Posterior; S: Superior; I: Inferior.

Figure 4 Intraoperative view. DV: Diploic vein; SS: Sigmoid sinus; TS: Transverse sinus; A: Anterior; P: Posterior; S: Superior; I: Inferior.