[Photochemotherapy in the treatment of oral erosive lichen planus. Letter].

Photochemotherapy with 8-methoxypsoralenes and PUVA has been found to be effective in the treatment of superficial skin inflammations, such as lichen planus. However, there is little bibliography on the treatment of oral lichen planus with PUVA. A case of oral erosive lichen planus was treated with oral psoralenes (0.6 mg/kg body weight) two hours before ultraviolet exposure. Twenty sessions were held, three weekly, for a total cumulative dose of 35.9 J/cm2. After treatment concluded, clinical symptoms and erosive lesions disappeared. PUVA therapy may be useful for severe forms of erosive oral lichen planus that do not respond to conventional treatment.