Comparison of local bath-PUVA with steroid treatment in palmoplantar pustular psoriasis and dyshidrotic eczema

Background : Local bath-PUVA(LB-PUVA) therapy has been recently tried for the treatment of palmoplantar pustular psoriasis and chronic eczema with successful results. However it has not been reported that the effectiveness of LB-PUVA was compared with that of steroid treatment which is the most available treatment. Objectives : The purpose of this study was to assess the effectiveness, symptom-free interval, recurrence rate and side effects of local bath-PUVA(LB-PUVA) therapy in palmoplantar pustular psoriasis and dyshidrotic eczema which had been resistant to conventional treatments and to compare these results with those of the steroid treatment. Methods : Twenty four patients with palmoplantar pustular psoriasis, dyshidrotic eczema and palmoplantar keratoderma were treated with local bath-PUVA and the control group of twenty patients with systemic and topical steroid. 1. Local bath-PUVA therapy. After a 15-minute bath in 1mg/L of methoxsalen solution(0.0001%), the palms or soles or both were exposed immediately to UVA radiation by UV/PUVA200. The initial standard dose was 1.5 J/cm², and the patients were treated three times a week. 2. Systemic and topical steroid therapy. The patients treated with 10-15mg of oral prednisolone once a day and high-potency steroid(Dermovate® ointment) to the lesion topically for 4-8 weeks. The efficacy, symptom-free interval and side effects were assessed for 6-12 months after termination of the treatments. Results : The following results were obtained from this study. 1. In the objective study, severity scores before and after treatment significantly differed in palmoplantar pustular psoriasis treated with local bath-PUVA (p<0.001). 2. In the subjective study, steroid treatment was more effective than LB-PUVA treatment for dyshidrotic eczema and palmoplantar pustular psoriasis. 3. Remission period was significantly longer (mean 9.1±2.8 months vs. 5.2±3.1 months) and recurrence rate, lower (26.7% vs. 68.9%) after LB-PUVA treatment than after steroid treatment in palmoplantar pustular psorisis and dyshidrotic eczema. 4. One patient with palmoplantar keratoderma was effectively treated by LB-PUVA. Conclusion: Local bath-PUVA therapy can be used as an effective and safe treatment method of palmoplantar pustular psoriasis and possibly palmoplantar keratoderma.