Pathologically Confirmed Malignant Syphilis Using Immunohistochemical Staining: Report of 3 Cases and Review of the Literature - Maldonado Cid, Paola; Sendagorta Cudos, Elena; Zamora Vargas, Francisco X; Beato Merino, Maria Jose; Herranz Pinto, Pedro (SEXUALLY TRANSMITTED DISEASES, 2014)