Additionally, the median WBC count was 3.4×109/L in the OM group compared to 4.3×109/L in the OM-free group (P<0.001), and the median hemoglobin (Hb) levels were 121 g/L in the OM group versus 127 g/L in the OM-free group (P=0.005). The gene discussed is GSTM1; the disease is ocular melanoma.