Pirfenidone-induced photoleukomelanoderma in a patient with idiopathic pulmonary fibrosis.

This is believed to be the first report of pirfenidone-induced photoleukomelanoderma. We discuss the male predominance of photosensitivity induced by pirfenidone. Both ultraviolet (UV)-A and UV-B seemed to be included within the action spectrum of this disorder. Although pirfenidone is a key drug for the treatment of idiopathic pulmonary fibrosis, clinicians should be aware of the high prevalence of photosensitivity and perform sufficient patient education for comprehensive photoprotection before prescription.