title: Extragenital syphilitic chancres.
abstract: Two patients with extragenital chancres are presented to emphasize unusual expressions of primary syphilis. The clinical presentations and differential diagnosis of extragenital chancres are discussed.
mesh_terms: D000328:Adult; D001003:Anal Canal; D002601:Chancre / Q000175:diagnosis*; D002680:Chin; D006801:Humans; D008297:Male; D013587:Syphilis / Q000175:diagnosis*; D013591:Syphilis, Cutaneous / Q000175:diagnosis*