Evaluation of 308-nm excimer light therapy for the treatment of palmoplantar pustular psoriasis

Masakazu Takahara, Takahito Chiba, Akiko Satomura, Gaku Tsuji, Shiori Kato, Chikage Mitoma, Satoshi Takeuchi, Yoichi Moroi, Masutaka Furue

Research output: Contribution to journalArticlepeer-review


We evaluated the efficacy and safety of targeted therapy by excimer light in the treatment of palmoplantar pustular psoriasis in this study. Thera Beam® UV308 is a 308-nm excimer light phototherapydevice which is equipped with a newly developed filter cutting off unwanted short wavelength light. Eight patients with PPP were recruited for this study, who completed a total of 16 treatments with this device once weekly. Clinical response was evaluated by the Palmoplantar Pustular Psoriasis Area and SeverityIndex (PPPASI) everyfour weeks. The results demonstrated that the average PPPASI score before treatment was 10.8. The mean PPPASI score was then reduced to 8.7 at 4 weeks, 6.5 (p<0.05) at 8 weeks, 4.6 (p< 0.01) at 12 weeks, and 4.2 (p<0.01) at 16 weeks after starting treatment, indicating significant improvement. The patients received a mean cumulative dose of 12.4 ± 4.2 J/cm2 with a mean final single dose of 1100 ± 334 mJ/cm2, showing no severe side effects. These findings indicate that 308-nm excimer light therapyusing Thera Beam® UV308 was effective for palmoplantar pustular psoriasis.

Original languageEnglish
Pages (from-to)64-67
Number of pages4
JournalNishinihon Journal of Dermatology
Issue number1
Publication statusPublished - 2012

All Science Journal Classification (ASJC) codes

  • Dermatology


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