Pruebas epicutáneas en pacientes con eczema perianal / Patch Testing in Patients With Perianal Eczema

INTRODUCCIÓN Y OBJETIVOS: La prevalencia de parches positivos en los pacientes afectados por una dermatitis anogenital oscila según las series entre un 25-78%, justificándose por tanto la realización de pruebas epicutáneas ante eczemas de esta localización. Los objetivos del presente estudio son por un lado determinar los alérgenos más frecuentes en los pacientes con eczema perianal y, por otro, establecer las baterías de alérgenos más útiles para el estudio con pruebas epicutáneas de esta afección. MATERIAL Y MÉTODOS: Se han revisado retrospectivamente (años 2001-2012) los resultados obtenidos al estudiar con pruebas epicutáneas a aquellos pacientes que presentaban exclusivamente un eczema perianal. RESULTADOS: De los 37 pacientes con esta clínica en 16 se observó alguna reacción positiva, siendo el metilcloroisotiazolinona/metilisotiazolinona el principal alérgeno implicado. Excepto un caso con sensibilización a gentamicina, todas las positividades con relevancia presente correspondieron a alérgenos de la batería estándar del Grupo Español de Investigación en Dermatitis de Contacto y Alergia Cutánea (GEIDAC) o a productos propios del paciente. CONCLUSIONES: En nuestra experiencia la metilcloroisotiazolinona/metilisotiazolinona es el principal alérgeno implicado en los eczemas perianales, procediendo esta sensibilización frecuentemente del uso de toallitas higiénicas. El estudio epicutáneo de un eczema perianal deberá realizarse básicamente con la batería estándar y los productos propios

INTRODUCTION AND OBJECTIVES: Reports show that between 25% and 78% of patients with anogenital dermatitis have positive patch test results. Consequently, patch testing would appear to be warranted in patients presenting with eczema in the anogenital region. The objectives of the present study were to identify the most common allergens in patients with perianal eczema and to determine which allergen series are most useful for patch testing in patients with this condition. MATERIAL AND METHODS: We performed a retrospective review of patch test results in patients with only perianal eczema between 2001 and 2012. RESULTS: Of the 37 patients with perianal eczema, 16 had a positive reaction; methylchloroisothiazolinone/methylisothiazolinone was the main allergen involved. With the exception of 1 case of sensitization to gentamicin, all the positive results with present relevance were to allergens from the standard series of the Spanish Contact Dermatitis and Skin Allergy Research Group (GEIDAC) or to the patient's own products. CONCLUSIONS: In our experience, methylchloroisothiazolinone/methylisothiazolinone is the main allergen involved in perianal eczema, and sensitization often results from using wet wipes. Patch testing in perianal eczema should be based on the GEIDAC standard series and the patient's own products

Patch testing in patients with perianal eczema.

INTRODUCTION AND OBJECTIVES: Reports show that between 25% and 78% of patients with anogenital dermatitis have positive patch test results. Consequently, patch testing would appear to be warranted in patients presenting with eczema in the anogenital region. The objectives of the present study were to identify the most common allergens in patients with perianal eczema and to determine which allergen series are most useful for patch testing in patients with this condition. MATERIAL AND METHODS: We performed a retrospective review of patch test results in patients with only perianal eczema between 2001 and 2012. RESULTS: Of the 37 patients with perianal eczema, 16 had a positive reaction; methylchloroisothiazolinone/methylisothiazolinone was the main allergen involved. With the exception of 1 case of sensitization to gentamicin, all the positive results with present relevance were to allergens from the standard series of the Spanish Contact Dermatitis and Skin Allergy Research Group (GEIDAC) or to the patient's own products. CONCLUSIONS: In our experience, methylchloroisothiazolinone/methylisothiazolinone is the main allergen involved in perianal eczema, and sensitization often results from using wet wipes. Patch testing in perianal eczema should be based on the GEIDAC standard series and the patient's own products.