Trigeminal Neuralgia Caused by the Metastasis of Malignant Lymphoma to the Trigeminal Nerve：a case report

　The authors cared for a patient suffering from left trigeminal neuralgia who had systemic malignantlymphoma which had been treated with chemotherapy. The lesion of the left trigeminal nerve was not de-tected by brain CT scans or by the magnetic resonance images made at the onset of trigeminal neuralgia.However, metastasis to the left trigeminal nerve root was disclosed 6 months after the onset of the syste-mic lymphoma. Open biopsy confirmed lymphomatous involvement of the left trigeminal nerve root.