GSTM1 and myelodysplastic syndrome: Allogeneic hematopoietic stem cell transplantation (HSCT) was indicated; however, prior to transplantation, his disease progressed to AML with cutaneous involvement (9 months after MDS diagnosis: Lc: 0.63 G/L, Hb: 7.9 g/dL, platelets: 6 G/L).