Figure 2:

(a) Posterior-anterior oblique view of a fused bilateral internal carotid three-dimensional digital subtraction angiogram showing the shunting point, which consisted of the left inferolateral trunk (blue) and the right meningohypophyseal trunk (pink). Note the small opacification in the posterior part of the cavernous sinus and the pontine bridging vein draining into the pontomesencephalic vein. (b) Anterior-posterior view on a non-subtracted craniogram obtained during embolization showed coils placed at the feeder as well as the shunting point. Postoperative anterior-posterior angiograms of both internal carotid arteries ((c) right; (d) left) and a (e) lateral angiogram of the left internal carotid artery showing complete obliteration of the fistula and the tortuous veins around the medulla oblongata. (f) A sagittal T2-weighted magnetic resonance image obtained 6 months after treatment showed a complete disappearance of the area of high signal intensity and flow voids around the brainstem and spinal cord.