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Volume 361:1809-1811 October 29, 2009 Number 18
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Hearing Improvement after Bevacizumab for Neurofibromatosis Type 2

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 by Plotkin, S. R.
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To the Editor: Plotkin et al. (July 23 issue)1 report a sustained tumor-volume reduction in 4 of 10 patients and a hearing response in 4 of 10 patients with neurofibromatosis type 2 after bevacizumab treatment. The authors' conclusion that tumor shrinkage and hearing improvement are effects of bevacizumab treatment is not convincing, because the study did not involve a control group. Shrinkage of a vestibular schwannoma, especially in cystic tumors in patients with neurofibromatosis type 2, can also occur during an observation period without any treatment.2 In addition, some patients who have been assigned to wait-and-scan observation show hearing improvement . . . [Full Text of this Article]




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