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Woronoff ringL81.5

Author:Prof. Dr. med. Peter Altmeyer

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Last updated on: 19.07.2024

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Synonym(s)

leukoderma psoriaticum

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DefinitionThis section has been translated automatically.

Halo-like light coloration around psoriasis lesions due to temporary contrasting of the surrounding area after dithranol therapy, with simultaneous non-coloration of the psoriatic lesion. Such contrast phenomena can also occur after UV irradiation. It is a pseudoleukoderm, i.e. a pure color contrast phenomenon that is not based on a disorder of the melanocytes. See illustration under Psoriasis vulgaris.

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Last updated on: 19.07.2024

Author: Prof. Dr. med. Peter Altmeyer