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herald patch

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Pityriasis rosea is a common, acute, self limiting, papulosquamous condition thought to be due to HHV7 (1).

Many drugs have been linked with an extensive and often prolonged form of the disease e.g. - captopril, barbiturates, clonidine, gold (2).

Presentation is with fawn-coloured, large (around 2-10 cm in diameter), slightly raised, oval scaly patches which typically develop on the limbs and trunk - commonly known as an initial 'herald' lesion. Often there is a collarette of scale present at the margin in some lesions

Most commonly seen in children and young adults (2).

Click here for example images of pitryriasis rosea

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