Medical Dictionary

pityriasis rosea

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noun pityriasis ro·sea \-ˈrō-zē-ə\

Medical Definition of pityriasis rosea

  1. :  an acute benign and self-limited skin eruption of unknown cause that consists of dry, scaly, oval, pinkish or fawn-colored papules, usually lasts six to eight weeks, and affects especially the trunk, arms, and thighs


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