How I do it: surgical resection of ventrolateral pontomesencephalic junction glioma via oculomotor-tentorial triangle

Background The surgical resection of the pontomesencephalic junction (PMJ) glioma is difficult because the access is challenging due to nearby complicated neurovascular structures. Method We report a left ventrolateral PMJ glioma successfully resected via the oculomotor-tentorial triangle (OTT), with improved right extremity weakness postoperatively while preserving the pyramidal tract, which resided laterally and posteriorly to the lesion. Conclusion This case demonstrates the value of the OTT in brainstem surgery.