Abstract: Objective To explore the operative technique and clinical value of pure neuroendoscopy in surgeries on the cerebellopontine angle(CPA). Methods Clinical data of 96 patients with CPA diseases treated with pure neuroendoscopy were retrospectively analyzed. The operation time and therapeutic outcomes were evaluated. Results Of all 96 patients, 49 had trigeminal neuralgia, 43 had hemifacial spasm, and 4 had cholesteatoma. All of the responsible vessels, and the relation between tumor and auditory nerves and facial nerves were clearly shown under neuroendoscopy. Of the 49 patients with trigeminal neuralgia, 45 were pain free, and 4 achieved pain relief. Of the 43 patients with hemifacial spasm, 35 were symptom free, 7 were relieved, and 1 showed no immediate relief. Of the 4 patients with cholesteatoma, 3 underwent total ectomy and 1 received subtotal ectomy; the symptoms were greatly relieved. During the follow-up, no death or recurrence occurred. Conclusion It is feasible to complete a series of operations in the cerebellopontine angle area by pure neuroendoscopy, which can improve the surgical view with little damage to blood vessels and nerves. This technology is worth clinical application.

Key words: Neuroendoscopy, Trigeminal neuralgia, Cerebellopontine angle, Hemifacial spasm, Cholesteatoma