Stages of syphilis

Stages of syphilis

A 37-year-old male comes to the clinic with a complaint of a “sore on my penis” that has been there for 5 days. He says it burns and leaked a little fluid. He denies any other symptoms. Past medical history noncontributory.
SH: Bartender and he states he often “hooks up” with some of the patrons, both male and female after work. He does not always use condoms.
PE: WNL except for a lesion on the lateral side of the penis adjacent to the glans. The area is indurated with a small round raised lesion. The APRN orders laboratory tests but feels the patient has syphilis.

Question:
What are the 4 stages of syphilis