A 30-year-old man presents with a 5-day history of a bilateral, symmetric eruption consisting of multiple, well-demarcated, scaly, erythematous, droplike papules primarily distributed over his trunk and extremities. He denies having any systemic symptoms, but does note that he had a sore throat approximately 2 weeks ago.
The most likely diagnosis is
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Pityriasis rosea
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Secondary syphilis
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Nummular dermatitis
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Guttate psoriasis
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Pityriasis lichenoides
Answer on page 56
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