Koebner phenomenon has rarely been reported in patients with dermatomyositis, in one case from steam burn1 and in another, a possible scratch2.
A 71-year-old woman sought medical advice for 3 erythematous patches on her thighs that had developed after subcutaneous methotrexate injections (Figures 1A and 1B). Six months before, she had presented typical lesions of dermatomyositis including heliotrope rash, eyelid …