Meningioma
摘要
The cerebellopontine angle is surrounded by meningeal and arachnoid cells, making it a potential site for meningioma development. Meningioma is the second most common tumor type in the cerebellopontine angle, with its clinical appearance varying based on its location and size. Cerebellopontine angle meningioma can be classified in various ways, but the classification we follow in this chapter is topographic, as it correlates well with the clinical symptoms and the microneurosurgical approach. Almost all the cerebellopontine angle meningiomas are benign WHO grade I lesions typically treated through aggressive microneurosurgical resection. However, the limited volume of the cerebellopontine angle presents challenges for Simpson grade 1 resection. The majority of cerebellopontine angle meningiomas can be removed using a retrosigmoid technique, which involves systematic microneurosurgical excision through the cranial nerve roots. The stages of this microneurosurgical treatment are reviewed for each topography. Cerebellopontine angle meningioma has a fair outcome, low recurrence rate, low mortality, and favorable outcomes.