NHERF1 and meningioma: Of the 20 atypical meningioma cases, 4 (20%) were found to display either focal (n = 2) or more diffuse (n = 2) NHERF1 microlumen staining, as well as membranous expression (Table 1, Supplementary Table 1 and Supplementary Figure 1), whereas the reminder (80%) were negative.