Abstract
Most cases of trigeminal neuralgia are caused by neurovascular compression. We report a rare case of trigeminal neuralgia due to large cerebral arteriovenous malformation （AVM）.
Patient: The patient is a 62-year-old male. His chief complaint was electric shock-like pain on the left mandibul, and he was referred to our department from general practitioner. At the first visit, we suspected trigeminal nerve pain, and prescribed carbamazepine 100mg/day. The electric shock-like pain diminished. Head CT scan and MRI showed arteriovenous malformation（AVM） in the left occipital lobe. Under a diagnosis of secondary trigeminal neuralgia, the pain subsided within the range of self-control, after increasing the dose of the carbamazepine 400mg/day. Currently, the patient has been followed in the Department of Neurosurgery in our hospital, and the pain is controlled.
Discussion: The case was diagnosed secondary trigeminal neuralgia due to large cerebral arteriovenous malformation. Since the treatment method for AVM differs depending on Spetzler-Martin classification, it is important to cooperate with other related departments.
Conclusion: We report a rare case of trigeminal neuralgia due to large cerebral AVM. In this case, carbamazepine was effective for trigeminal neuralgia. If pain in the trigeminal region are present, we should differentially diagnose secondary trigeminal neuralgia attributed to intracranial lesions.
