The four cases of grade II atypical meningioma with focal part-chordoid morphology had a significantly different overall NHERF1 expression pattern from the NHERF1-diffuse positive chordoid meningiomas (Figure 3D, Supplementary Figure 1 and Supplementary Table 1) and resembled the cases of atypical meningioma with NHERF1 dot-like areas (see below). Here, NHERF1 is linked to Chordoid Meningioma.