The laboratory examinations revealed macrocytic anemia (Hb, 6.9 g/dl; MCV, 108.3 fl), polymorphonuclear leukocytosis (WBC, 1.1×109/l), a platelet count of 7×109/l and a C-reactive protein level of 122.6 mg/l (normal, <8 mg/l). This evidence concerns the gene GSTM1 and macrocytic anemia.