Successful treatment of cardiac involvement in dermatomyositis with rituximab.

Polymyositis and dermatomyositis are autoimmune inflammatory myopathies characterized by muscle weakness and inflammation. Current recommended therapy includes corticosteroids as mainstay treatment in addition to immunosuppressant. We present herein a 25year-old female with dermatomyositis and cardiac involvement resistant to disease modifying anti-rheumatic drugs and anti-tumor necrosis factor-alpha. She was treated with anti-CD20 monoclonal antibody, rituximab. The patient demonstrated a remarkable clinical and laboratory response. B-cell depletion therapy with rituximab may be a viable option in patients with dermatomyositis and heart disease.