Pityriasis rosea is a relatively common skin disorder. In its typical form
it is easily recognizable; however, atypical forms can pose diagnostic prob
lems. We report a 44-year-old woman with an acute onset of a localized erup
tion on her left breast. The morphology of the rash and the time course wer
e typical of pityriasis rosea. Localized pityriasis rosea is an unusual var
iant, which has been described previously.