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. 2022 Jul 11;23(4):e232–e236. doi: 10.1227/ons.0000000000000333

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© The Author(s) 2022. Published by Wolters Kluwer Health, Inc. on behalf of Congress of Neurological Surgeons.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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FIGURE 2. — Intraoperative photographs of a 67-year-old man who underwent microvascular decompression for right trigeminal neuralgia. A and C, The vein of the cerebellopontine fissure (white arrowhead) penetrates the trigeminal nerve, the transverse pontine vein (black arrowhead) contacts the ventral side of the trigeminal nerve, and the trigeminal nerve is in traction. B and D, By cutting a part of the superior petrosal vein (SPV, black square), the blood flow from the pontotrigeminal vein (white arrow) to the SPV was maintained, and the blood flow from the vein of cerebellopontine fissure to the SPV was diverted to the transverse pontine vein. SPV, superior petrosal vein.