NF2 and meningioma: We have previously shown that treatment with bevacizumab can lead to tumor shrinkage of vestibular schwannomas in patients with NF2,[9] with follow up study showing radiographic response in 55% of vestibular schwannomas, and hearing improvement in 57% in our cohort of 31 patients.[28] In these same patients, radiographic responses for meningiomas were seen in only 29% of meningiomas and were short-lived..