XDH and meningioma: For example, other polymorphisms have been reported to have a role in meningioma development, such as those in NFKB1, VCAM1, FCER1G, CD14, TNFRSF18, RAC2, XDH, C1D, CCR6, TLR1/TLR10/TLR6, NOS1, and DEFA5 genes [24].