VEGFA and NF2-related schwannomatosis: Previous studies suggested that vascular endothelial growth factor (VEGF) produced by schwannoma cells might activate tumor growth, leading to associated hearing loss in NF2 patients [40,41], and that bevacizumab, a humanized monoclonal antibody against VEGF, might inhibit this process, bringing hearing improvement and reduction in tumor size [41,42,43,44].