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Isolated Trigeminal Neuropathy Involved with Motor Dysfunction due to Small Infarction in the Pontine Tegmentum Seiji Uesugi 1 , Hisato Nakayama 1 , Mayu Higashi 1,2 , Michiyasu Suzuki 2 1Department of Neurosurgery,Saiseikai Shimonoseki General Hospital 2Department of Neurosurgery,Yamaguchi University School of Medicine Keyword: isolated trigeminal neuropathy , pontine tegmentum infarction , motor nucleus of trigeminal nerve , diffusion-weighted MRI pp.987-990
Published Date 2010/9/1
DOI https://doi.org/10.11477/mf.1416100751
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Abstract

 We present a case of isolated trigeminal neuropathy involved with motor dysfunction due to a small infarction in the pontine tegmentum. A 70-year-old man presented with sudden numbness around the left mouth accompanied by maxillary pain. Neurological examinations revealed jaw deviation to the left when opening the mouth, but no other abnormal findings including those of the cranial nerves were detected. X-rays indicated hypomobility of the left temporomandibular joint, and diffusion-weighted magnetic resonance imaging (MRI) revealed a small infarction in the left pontine tegmentum. Unilateral limitation of the temporomandibular joint movement, numbness, and pain in the territory of the left trigeminal nerve resolved within 2 months. This case suggests that a small infarction in the pontine tegmentum can simultaneously cause trigeminal neuralgia and masticatory muscle weakness with no other symptoms and signs. MRI, especially diffusion-weighted imaging, should be considered for patients with isolated trigeminal neuropathy.

(Received: December 22,2009,Accepted: March 23,2010)


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電子版ISSN 1344-8129 印刷版ISSN 1881-6096 医学書院

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