Trigeminal neuralgia caused by nasopharyngeal carcinoma with skull base invasion--a case report.

We report a case of nasopharyngeal carcinoma with skull invasion, whose chief complaint was left-sided facial pain, which mimicked trigeminal neuralgia, and in whom there was no palpable neck mass. The magnetic resonance imaging (MRI) revealed an infiltrated lesion with abnormal signal intensity in the left nasopharynx, involving the left retro- and parapharyngeal space. The lesion was pathology-proven through biopsy of the nasopharynx to be a non-keratinizing carcioma. The patient received 6000 rad radiotherapy combined with 5-Fluorouracil(5-FU) and Cisplatin, and has been well after 2 years' follow-up.