Blood tests showed anemia (Hb, 7.9 g/dl), severe hypertransaminasemia (AST, 1173 U/L; ALT, 1976 U/L), elevated lactated dehydrogenase (LDH, 1066 U/L), hyperferritinemia (555 ng/ml), and hepatosplenomegaly with multiple small iso-hypoechoic splenic nodules (Figure 1, Pt 3). Here, GSTM1 is linked to anemia (phenotype).