Elevated CK: 0 (0)  Positive ANA: 6 (100)  Elevated ESR: 1/5 (20) Myositis in EMG: 2/5 (40)  Myositis in muscle biopsy: 0/0 (0)  Muscle inflammation on MRI: 0/1 (0)  Skin biopsy consistent with DM: 5/5 (100). This evidence concerns the gene BTG3 and dermatomyositis.