Updates on Pityriasis Rubra Pilaris: A Scoping Review.

Pityriasis rubra pilaris (PRP) is a rare, inflammatory papulosquamous skin disease with unknown exact etiology. Historically, PRP has been challenging to diagnose, especially during the acute phase, and to treat, due to its unclear pathogenesis. To better inform clinical practice, a literature review was conducted employing a broad search strategy to capture PRP-related published studies between January 1, 2012 to October 31, 2022. Two hundred twenty-one studies were identified, which were categorized into 9 themes: (1) potential causes and triggering factors, (2) comorbidities, (3) diagnostic difficulties, (4) genetics, (5) clinical manifestations and laboratory values, (6) treatment, (7) treatment-related adverse events, (8) quality of life, and (9) other. COVID-19 infection, COVID-19 vaccination, and malignancy were the most commonly reported potential triggering factors. Misdiagnosis is very common during the early acute stages. Pathogenesis and genetic studies have further implicated caspase recruitment domain family member 14 (CARD14) mutations in the development of familial PRP (Type V) and have underlined the overlap between psoriasis and PRP. To date, there are currently no specific and validated scoring systems or tools to assess the severity of PRP. While large, randomized trials are still lacking, biologic agents remain the most effective therapy.

Rapid Response of Palmoplantar Psoriasis to Risankizumab: A Case Report.

Palmoplantar psoriasis, a clinical variant of plaque psoriasis, has a significant impact by causing deterioration in the social and functional aspects of patients' lives. Numerous therapeutic interventions are available for palmoplantar psoriasis. Although emerging biological agents have had an enormous positive impact on chronic plaque psoriasis, studies assessing their effectiveness in the palmoplantar phenotype are limited in the literature. We therefore present a case report of a patient with a 10-year history of palmoplantar psoriasis, which has significantly impacted her occupational life. She was treated with Risankizumab, showing a significant and rapid improvement in her symptoms. We believe that Risankizumab could be one of the most effective therapeutic interventions in the clinical context where rapid clearance of palmoplantar psoriasis is required.