Jeffrey H. Zimering December 2, 2017

Journal of Neurosurgery, Ahead of Print.
The authors report the case of a 52-year-old man who presented with rapid-onset lancinating facial pain consistent with trigeminal neuralgia. Magnetic resonance imaging revealed a nonenhancing small lesion on the right trigeminal nerve concerning for an atypical schwannoma or neuroma. The patient underwent resection of the mass via a right retrosigmoid approach. His facial pain completely resolved immediately postoperatively and had not recurred at 6 months after surgery. The mass was consistent with normal brain tissue (neurons and glial cells) without evidence of mitoses. A final histopathological diagnosis of ectopic brain tissue with neural tissue demonstrating focal, chronic T-cell inflammation was made. The partial rhizotomy during resection was curative for the facial pain. To the authors’ knowledge, this is the first report of neuroglial ectopia causing trigeminal neuralgia.

http://thejns.org/doi/abs/10.3171/2017.6.JNS17811?mi=67t04w&af=R

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