Influence of prophylactic photochemotherapy on incidence of relapse of psoriasis cleared initially with dithranol

Abstract

Forty one patients whose psoriasis cleared with dithranol were given prophylactic photochemotherapy with psoralens and ultraviolet A once a week. With life table analysis the chance of remaining in remission for 16 months was shown to be 42% for these patients, compared with 13% for a group of patients who were not given prophylactic photochemotherapy.