MSD Manual

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Syphilis—Primary: Chancre on the Genitals
syphilis_primary_genital_cropped
Syphilis—Primary: Chancre on the Genitals

    During the first (primary) stage of syphilis, painless sores (chancres) may appear on or around the genitals.

Image courtesy of Drs. Gavin Hart and N. J. Flumara via the Public Health Image Library of the Centers for Disease Control and Prevention.