Secondary syphilis in Adult
The natural history of syphilis is as follows:
- Primary lesion develops 10-90 days (average of 21 days) after direct inoculation.
- Primary lesion is typically a painless, asymptomatic papule, followed by a painless ulcer (chancre) and regional lymphadenopathy.
- Chancre lasts 3-6 weeks and heals spontaneously.
- Locations for chancres may include the vagina, cervix, penis, anus, rectum, lips, and inside of the mouth.
- Secondary syphilis is caused by hematogenous dissemination of bacteria.
- A wide range of clinical manifestations, dominated by prodromal symptoms and mucocutaneous manifestations 3-10 weeks after the appearance of the primary chancre.
- Prodromal symptoms and signs – Malaise, appetite loss, fever, headache, stiff neck, myalgias, pharyngitis, and flu-like symptoms. Generalized lymphadenopathy is typically present.
- Cutaneous manifestations – Generalized nonpruritic papulosquamous eruption including the palms and soles, with pink, violaceous, or copper-colored papules, each with a collarette of scale. Patchy alopecia of the scalp is also observed in secondary syphilis.
- Mucosal lesions – Mucous patches and "snail-track" ulcers in the mouth, and condyloma lata (gray, flat, moist papules and plaques) may be seen in moist anogenital locations or, more rarely, in the folds. They are teeming with spirochetes and are, therefore, extremely infectious.
- Ocular symptoms may include lacrimation, photophobia, and red, painful eyes.
- Malignant syphilis (lues maligna) is a rare, noduloulcerative manifestation of secondary syphilis. A generalized eruption of papules and nodules progresses to pustules and then to ulcers with overlying thick or rupioid (darkly colored and conical) crusts. Constitutional symptoms and generalized lymphadenopathy are usually seen. Most contemporary cases of malignant syphilis have been reported in the setting of underlying human immunodeficiency virus (HIV) infection.
- Mucocutaneous manifestations and prodromal symptoms last 3-12 weeks and resolve spontaneously.
- If left untreated, up to 25% of patients will relapse within the first 2 years.
- May appear months to years after secondary syphilis resolves and can involve the central nervous system, heart, bones, and skin.
Other related topics: Early Congenital Syphilis, Late Congenital Syphilis, Ocular Syphilis
A51.39 – Other secondary syphilis of skin
240557004 – Secondary syphilis
- Pityriasis rosea – Look for herald patch, collarette of scale, and orientation of lesions (fir-tree pattern in skin tension lines).
- Pityriasis rubra pilaris – Look for orange-red, waxy-like keratoderma of the palms and soles; consider tissue biopsy.
- Guttate psoriasis – Systemic signs absent, palms and soles are spared; biopsy will aid in diagnosis.
- Lichen planus – Very pruritic, violaceous, scaly papules, associated with hepatitis C; consider tissue biopsy.
- Lichen amyloidosis – Monomorphous papules.
- Drug eruption – Cutaneous lesions of drug eruption tend to be different than those seen in syphilis. Drug eruptions often present with urticarial, exanthematous, or vesicular / bullous lesions. Eosinophilia on CBC and histology are often seen (but eosinophilia is not an invariable finding). Look for NSAIDs, sulfonamides, and penicillin on medication history.
- Erythema multiforme – Characteristic target lesions (3 concentric colors that are round and well demarcated) occur on the extremities more often than the trunk. Precipitating factors are infectious (eg, herpes simplex virus, mycoplasma) and usually not medication related.
- Keratoderma blenorrhagica of reactive arthritis (Reiter syndrome)
- Tinea corporis – Check potassium hydroxide (KOH) test.
- Scabies – Check for scabies mites in mineral oil.
- Subacute cutaneous lupus erythematosus
- Herpes simplex
- Aphthous ulcers
- Erosions due to oral candidiasis
- Oral lichen planus
- Condyloma lata
- Condyloma acuminata
- Mucosal lichen planus
Last Updated: 03/05/2019