• Kyle P O'Connor, Panayiotis E Pelargos, Ali H Palejwala, Helen Shi, Lance Villeneuve, and Chad A Glenn.
• Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA.
• World Neurosurg. 2019 Jul 1; 127: 518-524.

BackgroundTrigeminal schwannomas are fifth cranial nerve tumors that originate from the nerve sheath. They rarely occur within the pediatric population and can cause dysfunction of the trigeminal nerve and surrounding structures. When patients become symptomatic, neurosurgeons should consider resection.Case DesriptionWe report the case of a 14-year-old adolescent boy who presented with an isolated sixth nerve palsy manifested by diplopia. The patient was found to have a trigeminal schwannoma involving the ophthalmic and maxillary branches of the trigeminal nerve. A modified mini-pterional craniotomy was performed for an extended middle fossa approach with an anterior petrosectomy to gain access to the inferior aspect of the posterior fossa tumor component. Intraoperatively, the sixth nerve was compressed within Dorello's canal. Postoperatively, the patient's sixth nerve palsy resolved, and magnetic resonance imaging demonstrated near-total resection with residual enhancement along the superior orbital fissure near the oculomotor nerve entry zone and foramen rotundum.ConslusionsWe present a rare case of pediatric trigeminal schwannoma type Mp treated surgically with a near-total resection via a novel mini-pterional approach and use of cranial nerve diffusion tensor imaging.Copyright © 2019 Elsevier Inc. All rights reserved.

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