Case 166. Syphilis, secondary (45 y-o M)

　 　 　 　
　 Multiple red-colored infiltrative papules on the neck and face of a lymphoma patient in a complete remission (biopsy from the neck skin) 　
　 　 　 　

　

 　 Immunostaining using a commercially available antiserum to Treponema pallidum identifies numbers of coiled pathogens among the squamous epithelium. After the histopathological diagnosis, strongly positive Wassermann's reaction was serologically reconfirmed.