Moreover, cyto-hub gene analysis revealed that CSNK2A1, CSNK2A2, TOP1, PRKACA, RBM39 (plasma), ALB, ACTB, GAPDH, FN1, APOA1 (serum), S100-A9, CXCL1, IL1RN, CSTA, S100-A8 (menstrual blood) and THBS1, ALB, CD44, ANXA2, and LUM (urine) were the top 5 proteins expressed in women with endometriosis. This evidence concerns the gene S100A9 and endometriosis.