title: Lichenoid secondary syphilis.
mesh_terms: D000328:Adult; D001706:Biopsy; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008010:Lichen Planus / Q000175:diagnosis; D008297:Male; D010401:Penicillin G Benzathine / Q000627:therapeutic use; D013591:Syphilis, Cutaneous / Q000175:diagnosis* / Q000188:drug therapy / Q000473:pathology
chemical_list: D010401:Penicillin G Benzathine