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“By the term malignant syphilis we understand a severe form of the disease, characterized by certain symptoms differing, rather in their nature than in mere severity, from the usual forms of the malady.” Neisser A. Malignant syphilis. Br J Dermatol 1897;9:11–26. “An unusual variant of secondary syphilis is lues maligna, an ulcerative form characterized by […]