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A case of dermatomyositis that developed after delivery: the involvement of pregnancy in the induction of dermatomyositis

A relationship between dermatomyositis (DM) and pregnancy has rarely been documented, and most cases have been reported from the viewpoint of the management of high‐risk pregnancy. We report a patient with DM which developed after the delivery of a healthy infant. This case, with support from a literature review, suggests that pregnancy could be a trigger for the development of DM. Furthermore, it is suggested that there are at least two types of pregnancy related DM: in one type, the disease activity is provoked during pregnancy and tends to improve after delivery, while the other type (including the present case) has onset in the postpartum period.