NF2 and meningioma: Among meningiomas with GTR, PFS was also different depending on Ki-67 index (Ki-67 ≥ 4 vs. Ki-67 < 4, p = 4.9 × 10–10), FOXM1 protein expression in 111 cases (high vs. low, p = 0.00052), and FOXM1 protein expression in 40 cases of supratentorial NF2 meningioma (high vs. low, p = 0.013) (Additional file 1 Fig. S2A, 2B, 2C).