Syphilis Stages Guide for Men: Symptoms, Diagnosis, Treatment

Syphilis is a sexually transmitted bacterial infection caused by Treponema pallidum, a corkscrew-shaped spirochete. T. pallidum cannot be cultured in standard laboratory conditions and is highly fragile outside the body. The bacterium spreads through direct contact with active lesions, usually during sexual intercourse, oral sex, or kissing of infected lesions.

Primary syphilis appears 10-90 days (mean 21 days) after infection as a single painless ulcer (chancre) at the inoculation site. The chancre is round, indurated, with a clean base, typically 0.5-2 cm in diameter, with painless regional lymphadenopathy.

• Location (men): Glans, foreskin, shaft, perianal area, lips, oral mucosa
• Appearance: Round, painless, indurated ulcer with clean base
• Lymph nodes: Painless inguinal lymphadenopathy
• Resolution: Heals spontaneously in 3-6 weeks even without treatment
• Pitfall: Painless and self-resolving – frequently overlooked

The painless, self-healing nature of the chancre is the major reason patients fail to seek care, allowing progression to secondary syphilis.

Secondary syphilis appears 4-10 weeks after the primary chancre (or 6 weeks-6 months post-infection) as widespread bacterial dissemination causes diverse manifestations:

• Roseola syphilitica: Pink, non-itchy macules on trunk, palms, soles – the classic “great imitator”
• Mucous patches: Painless, gray-white plaques in mouth, genitalia
• Condyloma lata: Moist, flat, gray growths in genital/anal areas
• Generalized lymphadenopathy
• Constitutional symptoms: Fever, malaise, headache, myalgia
• Hair loss: Moth-eaten alopecia patterns

The palm/sole rash is highly distinctive but can be missed if not specifically examined. Like the primary chancre, secondary syphilis resolves spontaneously without treatment, leading to the latent stage.

Latent syphilis is asymptomatic infection where the patient remains seropositive but shows no clinical signs. Subdivided into:

• Early latent (less than 1 year): Still infectious to partners
• Late latent (over 1 year): Non-infectious sexually but transmissible to fetus in pregnancy

About 60-70% of untreated latent syphilis remains asymptomatic for life; 30-40% progresses to tertiary syphilis over 10-30 years.

Tertiary syphilis develops 10-30 years post-infection in 30-40% of untreated patients and includes:

• Cardiovascular syphilis: Aortitis, ascending aortic aneurysm
• Neurosyphilis: Meningitis, dementia (general paresis), tabes dorsalis
• Gummatous syphilis: Granulomatous lesions in skin, bone, organs
• Cardiac complications: Aortic regurgitation, congestive heart failure
• Eye involvement: Optic atrophy, blindness

These complications are often irreversible even with treatment, making early diagnosis essential.

Syphilis diagnosis uses two complementary blood tests:

• Non-treponemal test (RPR/VDRL): Quantifies disease activity, falls with treatment
• Treponemal test (TPHA/TP-Ab): Specific to T. pallidum, remains positive lifelong

Combined positive results confirm syphilis. RPR titer monitoring tracks treatment response – a 4-fold decrease indicates effective treatment.

Window period: tests positive 4-6 weeks post-infection, peak at 6-12 weeks. Concurrent HIV testing is essential due to high co-infection rates.

Benzathine penicillin G is the gold-standard treatment for syphilis worldwide. Treponema pallidum has remained universally penicillin-sensitive since penicillin discovery in the 1940s.

• Primary, secondary, early latent: Benzathine penicillin G 2.4 million units IM single dose
• Late latent or unknown duration: Benzathine penicillin G 2.4 million units IM weekly x 3 doses
• Neurosyphilis: Aqueous penicillin G IV 18-24 million units/day x 10-14 days
• Penicillin allergy: Doxycycline 100mg twice daily x 14-28 days

Cure rate: 95% for early stage, lower for late stage. Jarisch-Herxheimer reaction (fever, chills 1-12 hours after first dose) is common but self-limiting.

Untreated syphilis can lead to:

• Transmission to sexual partners and offspring (congenital syphilis)
• 30-40% progression to tertiary syphilis with cardiovascular, neurologic, and gummatous complications
• Aortic aneurysm rupture (cardiovascular syphilis)
• Dementia and neurologic deficits (neurosyphilis)
• HIV acquisition risk increased 2-5x due to ulcers
• Increased mortality from tertiary complications

Mens Care Clinic provides same-day RPR/TPHA serology testing and benzathine penicillin G injection. Concurrent HIV, gonorrhea, and chlamydia screening available. Private rooms, male-staff-led environment, three locations: Shimbashi, Akihabara, Omotesando. Toyosu Hospital (Showa University) partnership ensures backup for severe cases requiring IV therapy.

Common questions answered by Mens Care Clinic physicians.