The primary objective is to estimate the proportions of vestibular schwannomas (VS) and meningiomas after 10 days of exposure to the study drug RAD001 at a dose of 10 mg daily, as determined by immunohistochemistry. This is a "phase 0" PK (pharmacokinetic) and PD (pharmacodynamic) study of RAD001 in patients with Neurofibromatosis Type 2-related and sporadic VS and meningiomas. Enrolled patients will take RAD001 prior to a scheduled VS or meningioma surgery, and blood and tissue samples will be obtained for further analysis.