Pretemporal transcavernous transtentorial approach for right pontine cavernous malformation.

A 57-year-old man presented with acute changes in mental status. Brain CT showed a high-density lesion at the pons. Brain MRA revealed a very slow-flow vascular lesion at the right aspect of the pons, about 3.9 ⋅ 3.0 ⋅ 3.0 cm, compatible with a pontine cavernous malformation (CM). Gross-total removal was achieved. In this approach, a wider surgical corridor was obtained by opening the Meckel's cave and cutting the tentorium. For a midline attack point on the pons, additional removal of the posterior clinoid process can meet the goal. In the authors' opinion, this approach is safe and effective in selected ventrolateral pontine CMs. The video can be found here: https://youtu.be/moHqEkp5eCA.