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A 18 year old male prostitute comes into the family practice clinic asking about a local, nontender ulcer (chancre) on penis. The ulcer is about 1 cm (note that the case gives the range of 0.3 to 2 cm) with a hard edge and clean, yellow base. Physical exam reveals slight lymphadenopathy. Laboratory: Spirochete on darkfield and immunoflourescence microscopy. FTA-ABS positive. VDRL positive.
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