Unexpected photosensitivity ‐ a patient with dermatomyositis and concomitant solar urticaria

Abstract

Dermatomyositis (DM) is a connective tissue disease with rare incidence, characterized by progressive muscle weakness and typical cutaneous manifestations. Its pathogenesis is still incompletely understood, but next to genetic predisposition environmental factors seem to be implicated in the development of DM (1). Photosensitivity is one important factor for the onset and exacerbation of DM, which is corroborated by the distribution of the cutaneous features on sun‐exposed areas and disease photoaggravation (2,3).

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