We found four open studies and one RCT.3 The controlled study of oral PUVA therapy was conducted on 18 patients with erosive or ulcerative oral LP, after ingestion of psoralen, 0-6 mg/kg, and randomised unilateral irradiation.38 The endpoint was comparison of the treated and non-treated sides. After 12 sessions (total dose 16.5 J/cm2), the treated side showed a marked or slight improvement in 13 patients and the control side improved in six patients.
We found a small series of seven patients with severe resistant erosive oral LP treated with extracorporeal photochemotherapy.39 Complete remission was obtained in all patients.
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