CXCL13 level was significantly lower in ITP patients who responded to steroids compared to non-responders (P = 0.005), and It was significantly higher in patients who needed transfusion compared to those who did not (121.24 ± 25.63 vs. 104.31 ± 27.3; P = 0.023) (Table 2). The gene discussed is CXCL13; the disease is autoimmune thrombocytopenic purpura.