At the time of DM diagnosis, laboratory parameters were as follows: median CK level 454 (37-16729) IU/L, AST 55 (21–535) IU/L, CRP 5.9 (0.5–120) mg/dl, and hemoglobin (Hb) 13.3 (8.5–16.2) gr/dl. The gene discussed is GSTM1; the disease is dermatomyositis.