Phototherapy and Photochemotherapy for Psoriasis

Emoke Racz, Errol Prens

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42 Citations (Scopus)

Abstract

Phototherapy is a first-line option for the treatment of moderate to severe psoriasis. Systematic reviews indicate near comparable efficacy of the different forms of phototherapy. Localized phototherapy can be an adjunctive treatment of recalcitrant plaques during systemic treatment of psoriasis. More than 200 psoralen UV-A therapy treatment sessions is associated with an increased risk of keratinocytic cancers, whereas no increased risk has been demonstrated for narrow-band UV-B therapy. The mechanism of action of phototherapy in psoriasis is via inhibition of keratinocyte proliferation; induction of apoptosis in keratinocytes, dendritic, and T cells; and inhibition of Th1 and Th17 pathways, but activation of Th2.
Original languageUndefined/Unknown
Pages (from-to)79-+
JournalDermatologic Clinics
Volume33
Issue number1
DOIs
Publication statusPublished - 2015

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