## Secondary Syphilis: Clinical Features **Key Point:** Secondary syphilis occurs 4–10 weeks after the primary chancre and is characterized by systemic manifestations due to hematogenous and lymphatic dissemination of *Treponema pallidum*. ### Characteristic Rash - **Maculopapular eruption** involving the trunk, extremities, palms, and soles (pathognomonic distribution) - Non-pruritic, non-painful - May be accompanied by fever, lymphadenopathy, and constitutional symptoms - Lesions do not blanch with pressure ### Associated Systemic Features - Generalized lymphadenopathy ("shotty" lymph nodes) - Hepatosplenomegaly - Mucous patches (painless, gray-white erosions on oral mucosa) - Condyloma lata (broad-based, moist papules in intertriginous areas) - Constitutional symptoms: fever, malaise, headache, arthralgia **High-Yield:** The involvement of **palms and soles** in the rash is a distinguishing feature of secondary syphilis and is tested frequently in NEET PG. ### Differential Timing | Stage | Onset After Exposure | Key Finding | |-------|----------------------|-------------| | Primary | 3–90 days (avg 21 days) | Painless chancre | | Secondary | 4–10 weeks after chancre | Systemic rash + lymphadenopathy | | Latent | Follows secondary stage | Asymptomatic; serology positive | | Tertiary | 1–30 years later | Gummas, neurosyphilis, cardiovascular | **Clinical Pearl:** Secondary syphilis is the most infectious stage (aside from primary) due to high spirochete load in skin lesions and mucous membranes. 
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