Successful Short Desensitization Treatment Protocol with Narrowband UVB Phototherapy (TL-01) in Polymorphic Light Eruption / Protocolo de desensibilización corto y eficaz con NB-UVB (TL-01) en la Erupción Polimorfo Lumínica

Introduction: Polymorphic light eruption (PLE) is a common idiopathic photodermatosis that typically presents with pruritic papular or papulovesicular lesions on sun-exposed skin between spring and autumn. In many subjects PLE is mild, and can usually be prevented by the use of broad-spectrum topical sunscreens and a gradual increase in sunlight exposure. However, in some individuals, sunlight exposure results in florid PLE and they often benefit from prophylactic desensitization treatment using phototherapy in early spring, an artificial method that induces a "hardening" phenomenon. Objective: To describe and evaluate the efficacy of a short desensitization protocol, based on a one-month-treatment, administered twice a week with narrow band UVB in subjects with severe polymorphic light eruption (PLE). Methods: A retrospective, open planned and non-randomized study to assess the efficacy of UVB phototherapy in prevention of polymorphic light eruption. Results: Fifteen subjects diagnosed with severe PLE were treated with the standard protocol in our Photobiology Unit between 2014 and 2015. The effect of hardening was sustained during follow up in 87.5% of desensitization treatments. A statistically significant association (p<0.05) between the years of duration of the PLE and the response to treatment was found. Conclusions: The effect of hardening was maintained in the vast majority of subjects, obtaining a good benefit with no PLE episodes during all the summer. We demonstrate that our standard protocol is effective, and produces a successful outcome for the majority of PLE subjects. Our protocol is shorter than those currently applied, being favourable both for the patient and the physician (AU)

Introducción: La erupción polimorfa lumínica (EPL) es una fotodermatosis idiopática que se presenta típicamente en forma de lesiones papulares o pápulo-vesiculosas pruriginosas en áreas fotoexpuestas, típicamente entre primavera y otoño. En la mayoría de pacientes la EPL es leve, y se previene mediante el uso de fotoprotectores y una exposición gradual a la luz solar. En algunos casos la EPL es muy florida, y requiere una desensibilización profiláctica en primavera, que induce fenómeno de hardening. Objetivo: Describir y evaluar la eficacia de un protocolo de desensibilización que se basa en la administración de UVB de banda estrecha, 2 veces a la semana, durante un mes. Resultados: Se trataron un total de 15 sujetos con el protocolo de desensibilización entre los años 2014 y 2015. Se realizaron un total de 24 tratamientos. El efecto hardening se mantuvo en el 87,5% de los casos tratados. Se encontró una asociación estadísticamente significativa (p<0,05) entre los años de progresión de la enfermedad y la respuesta al tratamiento. Conclusiones: Los efectos del hardening se mantuvieron en la mayoría de los sujetos, los cuales presentaron un buen control de la EPL y ausencia de brotes durante el verano. Se demuestra la efectividad del protocolo de desensibilización en los sujetos con EPL, el cual tiene una duración más corta que los previamente descritos en la literatura (AU)

Refractory solar urticaria successfully treated with omalizumab with normalization of phototest / Urticaria solar refractaria tratada satisfactoriamente con omalizumab y normalización del fototest

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Successful Short Desensitization Treatment Protocol with Narrowband UVB Phototherapy (TL-01) in Polymorphic Light Eruption.

INTRODUCTION: Polymorphic light eruption (PLE) is a common idiopathic photodermatosis that typically presents with pruritic papular or papulovesicular lesions on sun-exposed skin between spring and autumn. In many subjects PLE is mild, and can usually be prevented by the use of broad-spectrum topical sunscreens and a gradual increase in sunlight exposure. However, in some individuals, sunlight exposure results in florid PLE and they often benefit from prophylactic desensitization treatment using phototherapy in early spring, an artificial method that induces a "hardening" phenomenon. OBJECTIVE: To describe and evaluate the efficacy of a short desensitization protocol, based on a one-month-treatment, administered twice a week with narrow band UVB in subjects with severe polymorphic light eruption (PLE). METHODS: A retrospective, open planned and non-randomized study to assess the efficacy of UVB phototherapy in prevention of polymorphic light eruption. RESULTS: Fifteen subjects diagnosed with severe PLE were treated with the standard protocol in our Photobiology Unit between 2014 and 2015. The effect of hardening was sustained during follow up in 87.5% of desensitization treatments. A statistically significant association (p<0.05) between the years of duration of the PLE and the response to treatment was found. CONCLUSIONS: The effect of hardening was maintained in the vast majority of subjects, obtaining a good benefit with no PLE episodes during all the summer. We demonstrate that our standard protocol is effective, and produces a successful outcome for the majority of PLE subjects. Our protocol is shorter than those currently applied, being favourable both for the patient and the physician.