Abstract
Patients (11) with chronic pityriasis lichenoids chronica were treated with topically applied bland emollient cream and minimally erthemogenic dose of UV radiation from fluorescent sunlamps. The conditions of all patients cleared completely in an average of 29 treatments, requiring an average UV dose of 388 mJ/sq cm at clearance. Phototherapy provides a convenient effective outpatient therapy for pityriasis lichenoides chronica.