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Narrow-band UV-B phototherapy: an effective and reliable treatment alternative for extensive and recurrent pityriasis versicolor.
Journal of Dermatological Treatment 2018 May
PURPOSE: In the previous studies, positive effect of sunlight on seborrheic dermatitis may well be explained by the direct influence of UV-light on the yeasts. Narrow-band ultraviolet-B phototherapy appears to be a very effective and safe treatment option for patients with severe seborrheic dermatitis. We aimed to investigate the efficacy of narrow-band ultraviolet-B phototherapy as an alternative treatment for pityriasis versicolor.
MATERIAL AND METHODS: A total of 38 patients diagnosed with disseminated pityriasis versicolor having more than four relapsing episodes within 12 months were treated with narrow-band ultraviolet-B phototherapy given three times weekly. Clinical assessment on the basis of the severity of pruritus, erythema/hyperpigmentation and scaling and mycological examination were made at Weeks 0, 4, 8, 12 and 16.
RESULTS: Of the remaining 30 patients, 20 (66.7%) achieved excellent results and four patients (14%) had mild residual disease. The decrease in the clinical scores calculated at 4th week, 8th week, 12th week and 16th week were statistically significant.
CONCLUSION: Narrow-band ultraviolet-B presumably may have an immunomodulatory and inhibitory effect on Malassezia growth. Narrowband ultraviolet-B is an effective and safe alternative tool for the management of extensive and recurrent pityriasis versicolor for patients who are unresponsive to conventional treatments.
MATERIAL AND METHODS: A total of 38 patients diagnosed with disseminated pityriasis versicolor having more than four relapsing episodes within 12 months were treated with narrow-band ultraviolet-B phototherapy given three times weekly. Clinical assessment on the basis of the severity of pruritus, erythema/hyperpigmentation and scaling and mycological examination were made at Weeks 0, 4, 8, 12 and 16.
RESULTS: Of the remaining 30 patients, 20 (66.7%) achieved excellent results and four patients (14%) had mild residual disease. The decrease in the clinical scores calculated at 4th week, 8th week, 12th week and 16th week were statistically significant.
CONCLUSION: Narrow-band ultraviolet-B presumably may have an immunomodulatory and inhibitory effect on Malassezia growth. Narrowband ultraviolet-B is an effective and safe alternative tool for the management of extensive and recurrent pityriasis versicolor for patients who are unresponsive to conventional treatments.
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