Trigeminal nerve lipoma presenting with trigeminal neuralgia: case report and literature review

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Surgical treatment of secondary trigeminal neuralgia. S.S. Korsakov Journal of Neurology and Psychiatry. 2024;(11):203-209

Cerebellopontine angle lipomas are benign mass lesions and rarely result trigeminal neuralgia. A 61-year-old male with right-sided trigeminal neuralgia in V2 and V3 divisions without sensory disturbances is reported in the article. MRI revealed mass lesion 11´11´4 mm on the lateral pontine surface spreading to the right trigeminal nerve root entry zone. No signs of neurovascular compression were found. Microsurgical exploration of the cerebellopontine angle showed a fatty mass adherent to the brainstem with incorporation of inferior part of trigeminal nerve root. Fatty tissue resection was followed by partial sensory trigeminal rhizotomy. Histological examination identified lipoma. Postoperative MRI showed small residual tissue with minimal ischemic area near trigeminal nerve root entry zone. Mild hypoesthesia within V2 and V3 trigeminal branches occurred after surgery. Trigeminal neuralgia completely resolved, and medications were discontinued. This clinical case and literature review clearly demonstrated successful elimination of trigeminal neuralgia in patients with cerebellopontine angle lipoma after resection of mass lesion and partial trigeminal rhizotomy.

Keywords:

lipoma

trigeminal neuralgia

cerebellopontine angle

trigeminal nerve

Authors:

Grigoryan G.Yu.

Vladimirsky Moscow Regional Research Clinical Institute

ORCID: 0000-0001-5745-8061

Sitnikov A.R.

Treatment and Rehabilitation Center

Grigoryan Yu.A.

Treatment and Rehabilitation Center

Received:

09.04.2021

Accepted:

08.10.2021

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