The efficacy of localized PUVA therapy for chronic hand and foot dermatoses.

The response to treatment of all patients enrolled over an 18-month period for localized oral or topical psoralen photochemotherapy (PUVA) of chronic hand and foot dermatoses was retrospectively reviewed. There were broadly similar success rates for the two groups for complete clearance: 61.5% (eight of 13 patients who completed therapy)--oral PUVA, 47.8% (11 of 23 patients who completed therapy)--topical PUVA, and for significant improvement: 23.1% (three of 13 patients)--oral PUVA, 30.4% (seven of 23 patients)--topical PUVA; there were no significant differences in response when diagnostic subgroupings of the hand dermatoses were taken into account. The mean number of treatments (22 for oral PUVA and 24 for topical), treatment durations (122 and 129 days), maximum UVA doses (11.2 and 12.3 J/cm2) and to a lesser extent cumulative UVA doses (189.3 and 237.0 J/cm2) for the therapies were similar in the two groups; adverse effects were minimal for both treatment protocols. However, at least five of the eight patients in the oral PUVA group and five of the 11 in the topical group who cleared completely relapsed after a mean 86 (range 19-245) and 174 (range 23-596) days, respectively. These findings are in broad agreement with those of previous studies. Therefore to avoid generalized photosensitivity and a higher likelihood of adverse effects with systemic therapy, as well as a possible slower relapse rate, topical therapy seems preferable.