NF2 and meningioma: 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.