It was observed that the RASSF6 methylation was more frequent in B-Cell Acute Lymphoblastic Leukemia (B-ALL) cases compared with T-cell acute lymphoblastic leukaemia (T-ALL) cases, whereas the RASSF10 hyper methylation was more frequent in T-ALL compared with pre-B-ALL and B-ALL patients. The gene discussed is RASSF10; the disease is acute lymphoblastic leukemia.