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Pityriasis rosea

Summary of Pityriasis rosea
Pityriasis rosea is a benign skin rash but may inflict substantial discomfort in certain cases. Classically, it begins with a single "herald patch" lesion, followed in 1 or 2 weeks by a generalized body rash lasting up to 12 weeks, however usually after 6 - 8 weeks, it typically self-resolves.

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Pityriasis rosea

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High Yield Notes
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Pityriasis rosea

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USMLE® Step 1 style questions USMLE

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USMLE® Step 2 style questions USMLE

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A 19-year-old man comes to the clinic because of a rash that started as a single lesion a few days ago. It has since spread throughout his chest and back. The patient had an upper respiratory infection nine days ago. Physical examination shows salmon pink patches, as seen below. Both VDRL and FTA-AB tests are negative. Which of the following is the most likely diagnosis?