Contact allergy to dithranol.
During treatment with a dithranol-containing collodion for common warts, a patient developed a eczematous reaction on the treated sites and the extremities. Patch testing revealed a contact allergy to dithranol. Two applications of the collodion cured the warts within 3 weeks. It is argued that contact allergy to dithranol occurs more frequently than is suspected.
D000328:Adult; D000873:Anthracenes / Q000009:adverse effects*; D000875:Anthralin / Q000009:adverse effects*; D003877:Dermatitis, Contact / Q000209:etiology*; D005260:Female; D006801:Humans; D010328:Patch Tests; D011565:Psoriasis / Q000188:drug therapy; D014860:Warts / Q000188:drug therapy
D000873:Anthracenes; D000875:Anthralin