Granuloma annulare treated with narrowband UVB phototherapy

Granuloma annulare is a benign cutaneous inflammatory disease,whose lesions have spontaneous improvement in two years in 50% of cases,but there is recurrence in 40% of patients. treatment may be topical,intralesional or systemic. the use of phototherapy with narrowband uvb is highlighted,whose mechanism of action in this disease is still unclear,probably related to the inhibition of t lymphocytes. herein,a case of a disseminated granuloma annulare of difficult therapeutic management is described. it was treated with narrowband uvb phototherapy twice a week for six months,with good clinical improvement,being a good low-risk therapeutic option and that,in this case,provided quick and satisfactory response. © 2017 by anais brasileiros de dermatologia.