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Studying Chronic Exposure of Mice to Ultraviolet B Radiation

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Narrowband UVB therapy for vitiligo: does the repigmentation last?

J C Sitek¹, M Loeb, J R Ronnevig

¹Department of Dermatology, Ulleval University Hospital, Oslo, Norway. jcsitek@online.no

Journal of the European Academy of Dermatology and Venereology : JEADV

|July 31, 2007

Summary

Narrowband ultraviolet B (UVB) therapy can lead to significant repigmentation in generalized vitiligo patients. However, stable long-term results require further investigation, as relapses can occur within two years post-treatment.

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Area of Science:

Dermatology
Phototherapy
Autoimmune Diseases

Background:

Narrowband ultraviolet B (UVB) therapy has shown promise for generalized vitiligo treatment since 1997.
Limited data exists on the long-term duration and stability of repigmentation achieved with UVB therapy.

Purpose of the Study:

To assess the long-term stability of repigmentation in generalized vitiligo patients treated with narrowband UVB.
To evaluate the duration of treatment-induced pigment restoration for up to two years after therapy cessation.

Main Methods:

An initial open trial involved 31 generalized vitiligo patients receiving narrowband UVB thrice weekly for up to 12 months.
Responders (>75% repigmentation) entered a follow-up phase, monitored for two years post-treatment.
Pigmentation status and relapse occurrences were recorded every six months.

Main Results:

Eleven of 31 patients qualified for the follow-up trial.
Six patients experienced relapse, with four occurring within six months of treatment cessation.
Five patients maintained stable repigmentation at the 24-month follow-up.

Conclusions:

Only 16% (five out of 31) of patients achieved stable repigmentation (>75%) two years after completing narrowband UVB therapy.
The findings highlight the potential for relapse even after successful initial treatment for generalized vitiligo.
Long-term monitoring is crucial to understand the durability of narrowband UVB treatment outcomes.