Although Wagner1 and Unverricht2 are credited with the first descriptions of dermatomyositis in the late 1880s, Unverricht suggested that Virchow3 may have been the first one to recognize the clinical features of this disease: "It is interesting that Virchow, already in the year 1866 . . . observed a patient he described as spotted with a rash and who otherwise reminded him of polymyositis."
Levine TD. History of Dermatomyositis. Arch Neurol. 2003;60(5):780-782. doi:10.1001/archneur.60.5.780