Abstract

IBANEZ FRANCO, Elvis Javier et al. Pytyriasis rubra pilaris posinfectious. Rev. Nac. (Itauguá) [online]. 2025, vol.17, e1700202.  Epub Aug 14, 2025. ISSN 2072-8174.  https://doi.org/10.18004/rdn2025.e1700202.

Pityriasis rubra pilaris is a rare and heterogeneous disease that can be hereditary or acquired. Acquired forms have been associated with viral or bacterial infections, and the disease presents with erythematous and scaly plaques interspersed with areas of healthy skin.

We present the case of a 2-year-old male patient with no prior medical history who presented with a 45-day history of symptoms, beginning with erythema and edema of the hands and feet, followed by a morbilliform rash and generalized scaling, especially in the periocular, perioral, and periungual areas. His medical history included a febrile episode associated with an upper respiratory tract infection prior to the onset of symptoms. Physical examination revealed erythematous-orange scaly plaques with scaling in specific areas. A skin biopsy confirmed pityriasis rubra pilaris with typical histopathological features.

Treatment was initiated with oral corticosteroid pulses and topical therapy with corticosteroids, calcipotriol, and emollients. Given the limited response, narrowband UVB phototherapy was added, delivering a total of 31.8 J/cm². The patient showed significant improvement in the skin lesions with this treatment modality.

Keywords : pityriasis rubra pilaris; phototherapy; corticosteroid..

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