DJAWAD, Khairuddin. Steroid-resistant Acute Generalized Exanthematous Pustulosis Mimicking Generalized Pustular Psoriasis Successfully Treated by Methotrexate. []. , 79, 3, pp.48-51.   30--2021. ISSN 2182-2395.  https://doi.org/10.29021/spdv.79.2.1327.

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Acute generalized exanthematous pustulosis is a rare drug-induced eruption that is characterized by sterile non-follicular pustules arising on an often edematous diffuse erythematous background. Generalized pustular psoriasis is an acute and severe clinical form of psoriasis presenting as pustular eruption with erythematous base. Differentiating both diseases is often challenging because of their clinical and histopathological similarities.

A 62-year-old woman presented with pustular eruption and fever three days after taking propyphenazone. Laboratory findings revealed leukocytosis and neutrophilia. Histopathological findings revealed a subcorneal spongiform pustule filled with neutrophils and perivascular inflammatory cell infiltration with neutrophils in the dermis. She was initially treated with systemic steroids, however, the lesions showed insignificant improvement. Treatment was then shifted to methotrexate which resulted in a dramatic clinical improvement.

A pustulose exantemática aguda generalizada é uma reacção adversa a fármacos rara caracterizada por pústulas estéreis não foliculares que surgem frequentemente em pele eritematosa. A psoríase pustulose generalizada é uma forma aguda e grave de psoríase que se manifesta por erupção pustulosa em base eritematosa e que pode ser difícil de distinguir da pustulose exantemática aguda generalizada tanto do ponto de vista clínico como histopatológico.

Apresentamos o caso de mulher de 62 anos com erupção pustular e febre três dias depois de tomar propifenazona, com leucocitose e neutrofilia. O estudo histopatológico mostrou uma pústula espongiforme subcórnea com neutrófilos e um filtrado inflamatório dérmico perivascular com neutrófilos e alguns eosinófilos. Dada a fraca resposta aos corticoides foi tratada com metotrexato com boa resposta.

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