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) 　
　 　 　 　

　

 　 In the dermis, infiltration of plasma cells is a prominent feature. Vascular endothelial cells are swollen. Pathologists should consider the possibility of syphilis under H&E observation.