Woronoff's ring is a skin condition characterized by a blanched halo of approximately uniform width surrounding
psoriatic lesions after
phototherapy or
topical treatments.
See also
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Psoriasis
Psoriasis is a long-lasting, noncontagious autoimmune disease characterized by raised areas of abnormal skin. These areas are red, pink, or purple, dry, itchy, and scaly. Psoriasis varies in severity from small, localized patches to complete ...
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List of cutaneous conditions
References
Disturbances of human pigmentation
{{Cutaneous-condition-stub}