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Objectives: To explore the short‐ and long‐term effects of UVB phototherapy preceding a fractional CO2 laser‐UVB protocol in patients with resistant nonsegmental vitiligo. Materials and Methods: This single‐center, prospective, split‐face/body, evaluator‐blinded study included adult patients with stable vitiligo refractory to conventional treatments. Two symmetrical lesions were selected. Phototherapy was delivered with one side covered, until minimal erythema. Within 3 days, 31‐month‐apart sessions of laser were performed on both sides. After each laser session, phototherapy was resumed three times weekly, with all lesions uncovered, until 8 weeks after the last laser session. At baseline, at the end of treatment, and 5 years later, a Mean Improvement Score by Physician (MISP) and a patient satisfaction 10‐point visual analog score (VAS) were recorded. Results: Ten patients (8 women and 2 men) were included; their mean age was 32.9 years; phototype III was predominant; the mean duration of vitiligo was 3 years. At the end of treatment and 5 years later, scores of lesions treated with UVB‐CO2‐UVB (mean MISP 3.0 and 2.9, mean ΔVAS 4.5 and 3.9, respectively), were higher than those of lesions treated only with CO2‐UVB (mean MISP 2.5 and 2.4, mean ΔVAS 4.1 and 3.6, respectively). After 5 years, one patient lost his partial response and two patients developed light hyperpigmentation on both sides. Conclusion: Exposure to UVB before CO2‐UVB explains the higher scores as it was the only variable between the two sides. It may improve the response of resistant lesions with a constantly sustained result over 5 years. [ABSTRACT FROM AUTHOR]

Background: Lichen planus (LP) is a chronic inflammatory disorder usually occurring in middle‐aged adults. Data are scarce in the pediatric population. Objective: To describe the patients' characteristics, clinical presentation, and management of pediatric LP. Methods: A systematic literature review of pediatric LP was performed in the Medline and Cochrane databases up to February 1, 2020. Demographic and clinical data were extracted for analysis, in addition to laboratory and histology findings, treatments used, and response to treatment. LP pemphigoides (LPP) was further pooled for a subcategory analysis. Results: One hundred and sixty‐four articles were included representing 985 patients. The most common country of origin was India. The most common clinical signs were flat‐topped papules (51%); the linear variant was present in 9%. Oral involvement was present in 22%. The most commonly used treatment was topical corticosteroids followed by systemic corticosteroids. The mean duration of treatment was 124.4 days. LPP patients had a short disease duration before diagnosis (4.1 months, P < 0.001) and failed previous treatment more frequently (P < 0.001). Systemic corticosteroids were more often prescribed in this subgroup (75%, P < 0.001) with more recurrence after treatment (31%, P = 0.048). Limitations: Lack of randomized controlled studies, in addition to publication bias. Conclusion: In children, LP had a wide polymorphous clinical presentation, and the reported cases were mostly from India. The linear variant was more common and the oral mucosa was less affected in children. LPP, a rare subtype in children, was treated with systemic corticosteroids and recurred more frequently. [ABSTRACT FROM AUTHOR]