The Menarini Group ("Menarini"), a leading international pharmaceutical and diagnostics company, and Stemline Therapeutics, Inc. ("Stemline"), a wholly-owned subsidiary of the Menarini Group, today announced that Nippon Shinyaku Co., Ltd. (Nippon Shinyaku), Stemline's development partner in Japan, received Orphan Drug Designation for tagraxofusp, from the Japanese Ministry of Health, Labor and Welfare (MHLW) for the expected indication of blastic plasmacytoid dendritic cell neoplasm (BPDCN).