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BACKGROUND: New highly effective drugs for moderate-to-severe cutaneous psoriasis are regularly marketed, and the hierarchy of treatments thus requires frequent review. OBJECTIVES: A Delphi method was used to enable a structured expert consensus on the use of systemic treatments and phototherapy among adults with moderate-to-severe psoriasis. METHODS: The Delphi method consists in achieving a convergence of opinions among a panel of experts using several rounds of questionnaires with controlled feedback between rounds. A two-part Delphi questionnaire was administered online to French psoriasis experts. In the first part, 180 items related to the prescription of systemic treatments and phototherapy for adult patients with moderate-to-severe psoriasis were grouped into 21 sections covering different lines of treatment and different forms of cutaneous psoriasis. The experts voted on each proposal using an ordinal 7-point Likert scale. The second part comprised 11 open-ended questions about special indications for each therapeutic class. These were converted into 101 questions for subsequent rounds. Consensus was deemed to have been reached if more than 80% of the experts agreed with a given proposal. RESULTS: Three rounds of questionnaires were sequentially sent to 35 participants between November 2021 and March 2022. Thirty-three (94%) completed all three rounds. For plaque psoriasis, only methotrexate was recommended by the experts as first-line systemic treatment (89% of votes). Cyclosporin was advocated in pustular and erythrodermic psoriasis, and acitretin was suggested for hyperkeratotic and palmoplantar psoriasis. In the event of failure of or intolerance to non-biological systemic treatments, guselkumab, risankizumab, ixekizumab or secukinumab were recommended by more than 80% of the experts. Tumor Necrosis Factor (TNF) inhibitors remain useful for patients with cardiovascular risk factors. Special indications were provided for each therapeutic class (methotrexate/narrowband ultraviolet B phototherapy, psoralen/ultraviolet A phototherapy, cyclosporin, acitretin, apremilast, TNF inhibitors, interleukin (IL)-12/23 inhibitors, IL-17(R)A inhibitors, and IL-23 inhibitors). CONCLUSIONS: This expert consensus statement indicate that newly available IL-17 and IL-23 inhibitors may be favored over TNF and IL-12/23 inhibitors as first-line biologics. The Centre of Evidence of the French Society of Dermatology has drawn up a decision-making algorithm to guide clinicians in the therapeutic management of moderate-to-severe psoriasis.

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BACKGROUND: Psoriasis affects 0.2-0.7 % of children and is associated with obesity. Published studies have been conducted in hospital settings (tertiary care). The PsoLib study evaluated childhood psoriasis in private practice (secondary care) in terms of epidemiology, clinical aspects and comorbidities. PATIENTS AND METHODS: This was a non-interventional, cross-sectional, multicenter study of children with psoriasis performed by 41 dermatologists working in private practice. The clinical and therapeutic aspects and comorbidities were systemically evaluated. We compared data to the χ-Psocar study performed in hospitals using the same methodology. RESULTS: In all, 207 children (girls: 60.4 %; mean age: 10.5±4.2 years) were included. Scalp psoriasis (40.6 %) was the most frequent clinical type, while plaque psoriasis represented 26 % of cases. Nail, tongue, and arthritic involvement were rare. Less than 1 % of children suffered from hypertension, diabetes or dyslipidemia, but 16.4 % were overweight and 7.0 % were obese. Severity (PG≥4 at peak) was associated with excess weight (P=0.01). CONCLUSION: Scalp psoriasis is the most frequent clinical type of psoriasis in childhood. Comorbidities and extracutaneous localization are rare. Even in private practice, the severity of the disease is associated with excess weight.

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INTRODUCTION: The cutaneous signs of toxicomania are better known since the last two decades. We describe an original case of segmental necrotic and chronic livedo of the right arm associated with cocaine use. OBSERVATION: A 31 year-old intravenous cocaine user presented a necrotic and painful livedo of the right arm. Two years before referral, localized recurrent edema was noted without general involvement. No local (infectious, vascular) or general (dysimmunity, coagulation abnormalities) aetiologies could be found. An amorphic substance composed of mineral bodies was found in the dermis, without damage to the vessels. Dramatic improvement was obtained with simple supportive care, while intravenous injections were stopped. DISCUSSION: The vasoconstrictive properties of cocaine have been demonstrated in Raynaud's phenomenon, ischemia, focal necrosis of the extremities, and also in liver and kidney disorders. This drug has pharmacological effects on endothelial cells and coagulation, explaining the arterial and venous thrombosis reported. The foreign bodies found in our patient probably came from an intraarterial injection. The progressive and chronic evolution, without any evidence of thrombosis at the time of examination, are suggestive of the vasoconstrictive action of chronic dermal deposits.

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BACKGROUND: Hemangiomas are frequent in childhood. Their association with dysmorphic anomalies is rare. Recently, the acronym "PHACES syndrome" was proposed to emphasize the association of Posterior fossa malformations, Hemangiomas, Arterial anomalies, Coarctation of the aorta and cardiac defects, Eye abnormalities, and Sternal malformations. CASE REPORT: A female child, 3 months old, had a large facial hemangioma. The physical examination was normal otherwise. A choroidal hemangioma and a papillary abnormality, causing amblyopia, were detected. The brain magnetic resonance imaging was normal. A subglottic hemangioma was found at endoscopy. At the age of 16 months, physical examination disclosed a heart murmur and coarctation of the aorta was detected. Moreover, the cardiac angiography showed diffuse arterial lesions. Strict surveillance was decided as there were no manifestations. DISCUSSION: Different abnormalities have been described to be associated with large facial hemangiomas. Frieden has grouped these abnormalities under the acronym PHACES. She described 43 hemangiomas and found 74 p. 100 Dandy Walker malformations and other posterior fossa malformations, 41 p. 100 arterial anomalies, 26 p. 100 cardiac or aortic malformations, 23 p. 100 ophthalmologic abnormalities. There is a high risk for the hemangiomas to develop in an airway localization. The prevalence of facial hemangiomas associated with other malformations is, to our knowledge, not known. In our department, 56 children were treated with corticosteroid therapy for severe facial hemangioma. 11 p. 100 had a cerebral abnormality. There were no cases with cardiac malformation or dysmorphism. PHACES syndrome is very rare but easy to remember. Thus in patients presenting a large facial hemangioma, it is important to conduct an attentive neurological examination completed by brain imaging and an extensive cardiovascular exploration. Special attention should be given to the ophthalmologic and sternal examinations as well as the search for hemangiomas in an airway localization.

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