GSTM1 and Pancytopenia: Initial laboratory examination after transfer demonstrated an improved AST level of 97 U/L, ALT level of 127 U/L, and PT activity of 62%, whereas an elevated T-Bil level at 34.5 mg/dL was still observed, and pancytopenia grossly progressed to WBC of 4 × 102/μL, Hb level of 9.2 g/dL, reticulocyte count of 4.6 × 104/μL, and PLT of 1.3 × 104/μL. Bone marrow examination showed fatty replacement and hypocellularity, a nucleic cell count of 7000/μL, and no aberrant karyotype (Figure 2).