Comparing survival probabilities in male and female patients disclosed that MPO+ve B-ALL male and female patients had lower survival probabilities compared to the same gender MPO-ve patients (p =0.0033; Log-Rank test), however, no significant difference was found when survival probability of B-ALL patients was compared to gender per se excluding the MOP status (p =0.37; Log-Rank test, Figure 4). The gene discussed is MPO; the disease is acute lymphoblastic leukemia.