The higher tumor necrosis factor-beta (TNF-β) (OR = 1.351, 95% CI = 1.015–1.797) and CXCL1 (Growth regulated oncogene-α) (OR = 1.291, 95% CI = 1.002–1.663) levels are associated with an increased risk of meningiomas using IVW methods, Table 3. This evidence concerns the gene CXCL1 and meningioma.