In the initial laboratory tests, the patient had anemia (Hb: 11.7 g/dl and Hct: 35.4% and MCV: 81 fl), slightly increased creatinine (Cr: 1.5 mg/dl), high erythrocyte sedimentation rate (ESR 1st hour: 72 mm/h) and C‐reactive protein (CRP: 3+), and hematuria (blood/Hb: 3+and RBC: 15–20). Here, GSTM1 is linked to anemia.