Disseminated granuloma annulare responding to narrowband UVB phototherapy

Abstract

To the Editor, Granuloma annulare (GA) is a granulomatous inflammatory, self-limited dermatosis of various clinical forms and unknown etiology. Localized GA is the most common manifestation. On the other hand, disseminated GA (DGA) accounts for approximately 2.8–15% of all cases, typically presenting with numerous erythematous papules and plaques on the trunk and extremities, and it usually proves a challenge to therapy. Psoralen-UVA (PUVA) photochemotherapy and UVA1 phototherapy have been shown to be effective for GA; however, data are scant on the efficacy of narrowband UVB (NBUVB) phototherapy on GA (1). We hereby describe two cases of DGA with excellent response to NBUVB phototherapy.