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Background: The COVID-19 pandemic has raised questions regarding the management of chronic skin diseases, especially in patients on systemic treatments. Data concerning the use of biologics in adults with psoriasis are reassuring, but data specific to children are missing. Moreover, COVID-19 could impact the course of psoriasis in children., Objectives: The aim of this study was therefore to assess the impact of COVID-19 on the psoriasis of children, and the severity of the infection in relation to systemic treatments., Methods: We set up an international registry of paediatric psoriasis patients. Children were included if they were under 18 years of age, had a history of psoriasis, or developed it within 1 month of COVID-19 and had COVID-19 with or without symptoms., Results: One hundred and twenty episodes of COVID-19 in 117 children (mean age: 12.4 years) were reported. The main clinical form of psoriasis was plaque type (69.4%). Most children were without systemic treatment (54.2%); 33 (28.3%) were on biologic therapies, and 24 (20%) on non-biologic systemic drugs. COVID-19 was confirmed in 106 children (88.3%) and 3 children had two COVID-19 infections each. COVID-19 was symptomatic for 75 children (62.5%) with a mean duration of 6.5 days, significantly longer for children on non-biologic systemic treatments (P = 0.02) and without systemic treatment (P = 0.006) when compared with children on biologics. The six children who required hospitalization were more frequently under non-biologic systemic treatment when compared with the other children (P = 0.01), and particularly under methotrexate (P = 0.03). After COVID-19, the psoriasis worsened in 17 cases (15.2%). Nine children (8%) developed a psoriasis in the month following COVID-19, mainly a guttate form (P = 0.01)., Discussion: Biologics appear to be safe with no increased risk of severe form of COVID-19 in children with psoriasis. COVID-19 was responsible for the development of psoriasis or the worsening of a known psoriasis for some children., (© 2022 European Academy of Dermatology and Venereology.)

Background: Mycosis fungoides (MF) is the most common type of cutaneous T-cell lymphomas in adults. In the recent past, several reports have focused on an increased prevalence of MF in children., Objective: The present study was aimed to evaluate the clinical characteristics, treatment modalities and disease progression in childhood MF patients from Turkey., Methods: In a retrospective analysis of 368 MF patients in a referral center at Istanbul, Turkey, 20 patients were diagnosed before the age of 18 years and were included in the study., Results: Childhood cases constituted 5.4% of all MF patients. The age at the time of diagnosis ranged between 2-18 years with a mean of 9.20 ± 4.52 and a median value of 9.50 years. The clinical presentation of MF consisted of solely patches in 60%, followed by plaques or plaques and patches in 40% of the patients. Hypopigmented lesions were seen in 45% and purpuric lesions in 30% of the patients. Four patients (20%) were diagnosed to have unilesional MF. The large majority of the patients (95%) had T1 N0 M0 or T2 N0 M0 disease. Sixteen patients were followed between 1-13 years (median: 3.75 years). All the patients were treated with skin directed treatments including topical corticosteroids, topical bexarotene, topical carmustine, narrow band UVB and PUVA. None of the patients progressed to an advanced stage. After an initial clearance, 69.2% of the patients were observed to have recurrences., Conclusion: In our experience, patches were more prevalent among childhood MF cases. Overrepresentation of hypopigmented and purpuric lesions was remarkable. Progression to an advanced stage was not seen. However, recurrences after discontinuation of therapy were common., (© 2011 The Authors. Journal of the European Academy of Dermatology and Venereology © 2011 European Academy of Dermatology and Venereology.)