Consistent with our results, it was shown that a WHO grade 1 meningioma cell line with NF2 loss, Ben-Men-1, expressed much higher levels of BCL2 mRNA compared to primary meningeal cells (50), making infiltrating activated leukocytes an unlikely contributor to high expression of BCL2 and GLI1 in NF2 meningiomas. This evidence concerns the gene GLI1 and meningioma.