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BACKGROUND: The long-term evolution of children with segmental facial infantile haemangioma (SFIH) treated with propranolol remains unstudied. OBJECTIVES: The objective of this study was to evaluate the neurodevelopmental features of children with SFIH treated with propranolol at 6 years of age. METHODS: This retrospective case series study was conducted from January 2008 to June 2020 using data from medical files, patient examinations and appointments spanning 6 years. To be included, patients should present SFIH and have previously received propranolol. A complete physical examination, magnetic resonance imaging (MRI) of the head, echocardiography and ophthalmologic examination should have been performed. Neurodevelopmental features were divided into cognition, audition, vision, orality, motor skills and the occurrence of new symptoms. RESULTS: Thirty children with SFIH were included. Of these, 11 presented criteria of PHACES. Evaluation of neurodevelopmental features of the children at 6 years of age showed learning difficulties in one case but grade skipping in three cases. There were six cases of unilateral hearing loss that had not been diagnosed at birth, two of oral difficulties and one of minor hypotonia. Early headache was primarily reported as the main new outcome. All children were treated with propranolol, with three following oral steroid therapy. No severe adverse effects were reported. The median length of treatment with propranolol was 16 months, and the median age at treatment cessation was 21 months. Analysis based on segment implication showed the median length of treatment to vary from 12 months (if S3 was spared) to 25 months (if at least S3 was involved). Vascular laser therapy was used in 16 patients (53.3%) and surgery in four. CONCLUSION: In this case series, children with SFIH, including patients with PHACES criteria, presented a good tolerance of propranolol, as well as encouraged neurodevelopmental data. Segmental implication appears to have a significant impact on treatment duration and associated complications.
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Hemangioma , Propranolol , Administração Oral , Antagonistas Adrenérgicos beta/efeitos adversos , Criança , Face , Hemangioma/diagnóstico , Hemangioma/tratamento farmacológico , Humanos , Lactente , Recém-Nascido , Estudos Retrospectivos , Resultado do TratamentoRESUMO
BACKGROUND: Atopic dermatitis (AD) is a chronic, relapsing, inflammatory skin disease. Therapeutic patient education (TPE) has been demonstrated to be effective in AD in reducing disease severity and improving coping and quality of life. OBJECTIVES: To describe the sociodemographic and clinical characteristics of children and adolescents with AD who had attended TPE sessions, as well as the characteristics of their parents, and compare them with those who did not attend TPE. METHODS: Parents of children with AD aged 6-17 years old were recruited from a representative sample of the French population contacted by e-mail. Sociodemographic data and clinical information were collected in patients and parents. Clinical severity was assessed by parents using a proxy version of the Patient-Oriented Eczema Measure (POEM). Attendance to TPE sessions was assessed by the following question 'did your child or one or both parents attended TPE for AD?'. Also, the number of sessions was recorded. Determinants of TPE attendance were evaluated by univariable and multivariable analyses. RESULTS: Data were collected on 1063 parents and children with AD. A total of 131 (12.3%) children and/or parents attended TPE sessions. Most of them attended 2-5 TPE sessions. In that group, there were 85 boys (64.9%), and severity evaluated by POEM was mild in 29.8%, moderate in 52.7% and severe in 17.6% of patients. In the multivariable model, attending TPE sessions was significantly associated with sex of the child (boy vs. girl), consultation with a dermatologist or a paediatrician, high clinical severity and presence of AD in parents. CONCLUSIONS: Despite recommendations, the use of TPE in children with AD is still low in France. There is a need for implementing such programmes in the management of the disease, in particular when the disease is severe.
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Dermatite Atópica , Eczema , Adolescente , Criança , Dermatite Atópica/terapia , Feminino , Humanos , Masculino , Pais , Educação de Pacientes como Assunto , Qualidade de Vida , Índice de Gravidade de DoençaRESUMO
INTRODUCTION: The distinction between epidermal necrolysis [EN; including Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN) and overlap syndrome] and erythema multiforme major (EMM) in children is confusing. We aimed to better describe and compare these entities. MATERIALS AND METHODS: This French retrospective multicentre study included children ≤18 years old referred for EN or EMM between 1 January 2008 and 1 March 2019. According to pictures, children were reclassified into TEN/overlap, SJS or EMM/unclassified (SJS/EMM) groups and compared for epidemiological and clinical data, triggers, histology and follow-up. RESULTS: We included 62 children [43 boys, median age 10 years (range 3-18)]: 16 with TEN/overlap, 11 SJS and 35 EMM. The main aetiologies were drugs in EN and infections (especially Mycoplasma pneumoniae) in EMM (P < 0.001), but 35% of cases remained idiopathic (TEN/overlap, 47%; SJS, 24%; EMM, 34%). The typical target lesions predominated in EMM (P < 0.001), the trunk was more often affected in EN (P < 0.001), and the body surface area involved was more extensive in EN (P < 0.001). Mucosal involvement did not differ between the groups. Two patients with idiopathic TEN died. Histology of EMM and EN showed similar features. The recurrence rate was 42% with EMM, 7% with TEN/overlap and 0 with SJS (P < 0.001). Sequelae occurred in 75% of EN but involved 55% of EMM. CONCLUSION: Clinical features of EN and EMM appeared well demarcated, with few overlapping cases. Idiopathic forms were frequent, especially for EN, meaning that a wide and thorough infectious screening, repeated if needed, is indicated for all paediatric cases of EN/EMM without any trigger drug. We propose a comprehensive panel of investigations which could be a standard work-up in such situation. Sequelae affected both EN and EMM.
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Eritema Multiforme , Síndrome de Stevens-Johnson , Adolescente , Criança , Pré-Escolar , Estudos de Coortes , Eritema Multiforme/diagnóstico , Eritema Multiforme/epidemiologia , Humanos , Masculino , Mycoplasma pneumoniae , Estudos Retrospectivos , Síndrome de Stevens-Johnson/epidemiologiaRESUMO
BACKGROUND: Scabies is a frequent condition seen in infants and children. Only topical treatments have been approved in infants, but some of them are poorly tolerated. Oral ivermectin is approved for the treatment of scabies in several countries, but its use in infants and children weighing < 15 kg is off label. OBJECTIVES: To assess the safety of ivermectin in infants and young children, and to collect data on ivermectin efficacy in these age groups. METHODS: This study was performed in the dermatology and paediatric dermatology departments of 28 French centres between July 2012 and November 2015. Physicians treating an infant or child weighing < 15 kg for scabies with oral ivermectin were asked to send back a completed standardized and anonymous questionnaire, and the data were analysed. RESULTS: Data were collected on 170 infants and children aged 1-64 months, with a body weight of 4-14·5 kg, who were treated with oral ivermectin. The mean dose received was 223 µg kg-1 and 89% of the patients received a systematic second dose. Concomitant topical treatment was administered to 73% of patients. Adverse events were reported in seven patients (4%) and were not severe. At the follow-up visit, 139 (85%) patients had achieved healing. Factors significantly associated with healing were an ivermectin dose > 200 µg kg-1 (P < 0·001), and a delay between those two doses of < 10 days (P = 0·025). CONCLUSIONS: Our findings suggest the safety and efficacy of ivermectin for the treatment of scabies in infants and young children. What's already known about this topic? Scabies is a frequent condition in small children and infants, but the therapeutic options are limited. Ivermectin has been approved for the treatment of scabies in adults and children > 15 kg, but its use is off-label in infants and children weighing < 15 kg. Safety data on the use of ivermectin in children weighing < 15 kg are limited. What does this study add? Of 170 infants and children weighing < 15 kg who were treated for scabies with oral ivermectin, there were only seven reported mild adverse events and no serious ones. Our results show that ivermectin is effective in treating scabies in 85% of patients. Efficacy is higher when the received dose exceeds 200 µg kg-1 and when the delay between the two doses is < 10 days. Respond to this article.
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Ivermectina , Escabiose , Administração Oral , Administração Tópica , Criança , Pré-Escolar , Humanos , Lactente , Ivermectina/efeitos adversos , Escabiose/tratamento farmacológico , Inquéritos e QuestionáriosRESUMO
BACKGROUND: Scabies is a common parasitic skin condition that causes considerable morbidity globally. Clinical and epidemiological research for scabies has been limited by a lack of standardization of diagnostic methods. OBJECTIVES: To develop consensus criteria for the diagnosis of common scabies that could be implemented in a variety of settings. METHODS: Consensus diagnostic criteria were developed through a Delphi study with international experts. Detailed recommendations were collected from the expert panel to define the criteria features and guide their implementation. These comments were then combined with a comprehensive review of the available literature and the opinion of an expanded group of international experts to develop detailed, evidence-based definitions and diagnostic methods. RESULTS: The 2020 International Alliance for the Control of Scabies (IACS) Consensus Criteria for the Diagnosis of Scabies include three levels of diagnostic certainty and eight subcategories. Confirmed scabies (level A) requires direct visualization of the mite or its products. Clinical scabies (level B) and suspected scabies (level C) rely on clinical assessment of signs and symptoms. Evidence-based, consensus methods for microscopy, visualization and clinical symptoms and signs were developed, along with a media library. CONCLUSIONS: The 2020 IACS Criteria represent a pragmatic yet robust set of diagnostic features and methods. The criteria may be implemented in a range of research, public health and clinical settings by selecting the appropriate diagnostic levels and subcategories. These criteria may provide greater consistency and standardization for scabies diagnosis. Validation studies, development of training materials and development of survey methods are now required. What is already known about this topic? The diagnosis of scabies is limited by the lack of accurate, objective tests. Microscopy of skin scrapings can confirm the diagnosis, but it is insensitive, invasive and often impractical. Diagnosis usually relies on clinical assessment, although visualization using dermoscopy is becoming increasingly common. These diagnostic methods have not been standardized, hampering the interpretation of findings from clinical research and epidemiological surveys, and the development of scabies control strategies. What does this study add? International consensus diagnostic criteria for common scabies were developed through a Delphi study with global experts. The 2020 International Alliance for the Control of Scabies (IACS) Criteria categorize diagnosis at three levels of diagnostic certainty (confirmed, clinical and suspected scabies) and eight subcategories, and can be adapted to a range of research and public health settings. Detailed definitions and figures are included to aid training and implementation. The 2020 IACS Criteria may facilitate the standardization of scabies diagnosis.
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Escabiose , Administração Tópica , Consenso , Humanos , Escabiose/diagnóstico , Escabiose/epidemiologia , PeleRESUMO
BACKGROUND: Although superpotent topical corticosteroids are the first-line treatment for oral erosive lichen planus (OELP), topical rapamycin was found efficient in a previous case series. OBJECTIVES: To compare the efficacy and safety of topical rapamycin and betamethasone dipropionate ointment for OELP in a randomized, double-blind trial. METHODS: Patients were randomized to receive treatment with betamethasone dipropionate ointment 0.05% in Orabase® or topical rapamycin solution (1 mg/mL) on lesions twice daily for 3 months, followed by 3 months of observation. The primary outcome was clinical remission after 3 months of treatment. Secondary outcomes were clinical remission after 1 and 2 months, reduced oral pain and reduced impact on food intake after 3 months, clinical recurrence after treatment withdrawal, and adverse events. RESULTS: During a 4-year period, 76 patients were randomized and 75 received treatment (rapamycin, n = 39; betamethasone, n = 36). At 3 months, 39.4% of patients with betamethasone and 27.3% with rapamycin showed clinical remission (odds ratio 0.68, 95% CI [0.24; 1.89]; P = 0.46). Rates of remission after 1 and 2 months, reduction in pain and impact on food intake after 3 months, were higher with betamethasone than rapamycin. Recurrence of oral erosions was similar between groups. Adverse events occurred in 43.6% of patients with rapamycin (mostly burning sensation, impaired taste) and 27.8% with betamethasone (mostly oral candidiasis). CONCLUSION: Although the study was limited by insufficient recruitment, we did not find any superiority of topical rapamycin over betamethasone dipropionate ointment for OELP. Given the rapid remission and pain improvement in the betamethasone group, it appears that superpotent topical corticosteroids should remain the first-line treatment for OELP.
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Líquen Plano Bucal , Psoríase , Administração Tópica , Betametasona/efeitos adversos , Betametasona/análogos & derivados , Método Duplo-Cego , Humanos , Líquen Plano Bucal/tratamento farmacológico , Recidiva Local de Neoplasia , Pomadas/uso terapêutico , Psoríase/tratamento farmacológico , Sirolimo/efeitos adversos , Resultado do TratamentoRESUMO
INTRODUCTION: Psoriasis affects 0.5% of children in Europe, with moderate to severe clinical forms in 15-35% of cases warranting the use of systemic treatments. Few treatments are licensed for childhood psoriasis. In this study, we analyzed the frequency of such prescriptions. MATERIALS AND METHODS: Our study was based on 3 retrospective cohort trials conducted in France between 2012 and 2018: χ-Psocar (313 children with psoriasis seen in hospitals), PsoLib (207 children seen in a private practice), and BiPe (134 children on biotherapies). Our evaluation was centered on off-label use. To avoid duplicates between cohorts, analysis focused on each cohort independently. RESULTS: In the χ-Psocar study, in 34.8% of cases, use of at least one off-label treatment, mainly topical vitamin D (36.0%), and systemic treatments (methotrexate and cyclosporine) was noted, on account of either the clinical type of psoriasis (13.7%) or patient age (24.6%). In the PsoLib study, in 41.5% of cases, at least one off-label treatment was noted, mainly combined calcipotriol-betamethasone (24.2%), ciclopirox shampoo (7.2%) and systemic treatments (n=20). The main reason was patient age (41.5%). In the BiPe study, in 97.0% of cases, at least one off-label treatment was noted. These prescriptions mainly concerned a combination of calcipotriol-betamethasone (68.7%) and tacrolimus (11.2%) along with systemic treatment comprising methotrexate, cyclosporin, methoxsalen or apremilast (n=125), but also biotherapies (n=85). The biotherapies were used off-label since at that time they had not yet been granted marketing authorisation. DISCUSSION: This study focused on 3 cohorts of children with psoriasis seen either in private practice or in a hospital setting, and it involved all types of treatment. Off-label prescriptions ranged from one-third to almost 100% of the children, depending on the individual cohorts. The prescribed drugs were topical treatments, conventional systemic drugs and biotherapies. Off-label prescription is not strictly prohibited in France provided it is within a well-defined regulatory framework. Where there is a rich bibliography, confident recommendations may be made. Unfortunately, in childhood psoriasis, the literature and recommendations are very limited, leaving prescribers with considerable individual responsibilities. Review of the license concerning children with psoriasis, a push to conduct therapeutic studies and the drafting of recommendations all appear necessary.
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Uso Off-Label/estatística & dados numéricos , Psoríase/tratamento farmacológico , Adolescente , Criança , Pré-Escolar , Estudos de Coortes , Feminino , Humanos , Masculino , Estudos RetrospectivosRESUMO
BACKGROUND: Contact dermatitis from topical antiseptic use has been reported mostly in adults, but rare cases of chlorhexidine contact dermatitis have also been described in young children. OBJECTIVE: To evaluate contact allergic dermatitis to antiseptics in young children. METHODS: The children mostly referred for a misdiagnose (cellulitis) were patch tested with a selection of the European baseline series, an antiseptics series and the personal topical products used. RESULTS: Fourteen children (8 boys, 6 girls) received a diagnosis of contact dermatitis to antiseptics between May 2010 and December 2017. The mean age at diagnosis was 38 months (8 months to 8 years); three children only had a personal history of atopy. Chlorhexidine gluconate was positive in seven cases, and benzalkonium chloride in eight cases, and in four cases, both allergens were positive. CONCLUSION: These small case series confirm that both chlorhexidine and benzalkonium chloride are implicated in contact dermatitis from antiseptic use in the paediatric population. We emphasize the initial misdiagnose of these patients, the very young age of the children and the allergenic potential of common antiseptics in non-atopic children. We hypothesize that the systematic use of antiseptics for umbilical cord care could be responsible for the sensitization in newborns.
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Anti-Infecciosos Locais/efeitos adversos , Compostos de Benzalcônio/efeitos adversos , Clorexidina/análogos & derivados , Dermatite Alérgica de Contato/etiologia , Criança , Pré-Escolar , Clorexidina/efeitos adversos , Feminino , Humanos , Lactente , Masculino , Testes do EmplastroRESUMO
BACKGROUND: Emollients are considered as a first-line therapy for the treatment of atopic dermatitis (AD). However, evidence-based proof that the regular use of emollients reduces AD severity is lacking. OBJECTIVE: To assess whether the regular use of emollients results in a reduction in AD severity in children with AD. METHODS: In this multicentre randomized, parallel group, open-label study, children with mild-to-moderate AD were recruited during a flare. After flare resolution with a topical corticosteroid, patients were randomized to V0034CR emollient, reference emollient or no emollient (1:1:1 ratio), for 12 weeks. AD severity was assessed regularly by physicians [Scoring for Atopic Dermatitis (SCORAD) and subcomponents, IGA] and by parents (PO-SCORAD and POEM). RESULTS: A total of 335 patients were randomized to V0034CR (n = 111), reference emollient (n = 116) or no emollient (n = 108). After 12 weeks of treatment, SCORAD score was reduced by 5.28 points in the V0034CR group and by 3.36 points in the reference emollient group compared with the no emollient group (+4 points; P < 0.001 in both emollient groups vs. no emollient group). In a similar manner, PO-SCORAD score was reduced by 4.88 and 2.67 points in the V0034CR and reference emollient groups, respectively, but increased by 2.90 points in the no emollient group (P < 0.001). Similar results were observed for POEM. A continuous decrease in all scores was observed over the 12-week treatment period. At the end of the study, the percentage of patients in complete remission (i.e. without a new flare over the treatment period) was higher in the V0034CR (59.5%) and reference emollient (44.3%) groups than in the no emollient group (29.8%; P < 0.001). CONCLUSION: These results demonstrate that the regular use of emollients in children with mild-to-moderate AD reduces the severity of symptoms and, therefore, support their use as a first-line treatment for these patients.
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Dermatite Atópica/tratamento farmacológico , Gorduras na Dieta/uso terapêutico , Emolientes/uso terapêutico , Glicerol/uso terapêutico , Ácido Glicirretínico/uso terapêutico , Parafina/uso terapêutico , Extratos Vegetais/uso terapêutico , Pré-Escolar , Dermatite Atópica/complicações , Combinação de Medicamentos , Feminino , Humanos , Masculino , Prurido/etiologia , Índice de Gravidade de Doença , Transtornos do Sono-Vigília/etiologia , Avaliação de Sintomas , Exacerbação dos Sintomas , Resultado do TratamentoAssuntos
Hamartoma , Ceratose , Poroceratose , Humanos , Recém-Nascido , Conexinas/genética , Hamartoma/genética , Mutação , Poroceratose/genéticaAssuntos
COVID-19 , Varicela , Herpes Zoster , Criança , Humanos , Pandemias , Estudos RetrospectivosRESUMO
BACKGROUND: Psoriatic arthritis affects 20-30% of patients with psoriasis. Few epidemiological data are available in France about its prevalence and its association with skin lesions and comorbidities. OBJECTIVES: To assess the epidemiological aspects and the risk factors for psoriatic arthritis in children and adults in France. METHODS: Two cross-sectional studies were conducted in France in children (χ-Psocar, 23 pediatric dermatology centers belonging to the SFDP, 1 year) and adults (Resopsocar, 29 dermatology centers belonging to GEM RESOPSO, 4 months) to study the link between psoriasis and cardiovascular and metabolic comorbidities. RESULTS: Three hundred and thirteen children (males: 47.6%; mean age: 9.4 yrs) and 1,954 adults (males: 56.0%; mean age: 48.5 yrs) with psoriasis were included, with 4.2% of the children and 21.0% of the adults presenting psoriatic arthritis. Prevalence increased with age: 2.2% of children, 14.2% of adolescents, and over 20% after 40 years. It decreased after the age of 70 years (19.4%). Regardless of age, arthritis was not associated with gender. In the children's group, rheumatism was associated with nail involvement (P=0.04) and disease severity (P=0.0004). Adult rheumatism was associated with generalized plaque psoriasis (P=0.002), disease severity (P<0.0001), and obesity (P<0.0001). Localized plaque psoriasis was less often associated with arthritis (P<0.05). CONCLUSIONS: These two cross-sectional studies conducted in 2267 patients in France yielded information on the prevalence of joint involvement from infants to elderly subjects. It is the first study conducted in a single population to provide data for the whole population. Prevalence gradually increases with age, without gender difference, before decreasing in old age. We confirm the association of nail involvement in the first years of life, and of obesity in adults.
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Artrite Psoriásica/epidemiologia , Adolescente , Adulto , Idoso , Artrite Psoriásica/patologia , Doenças Cardiovasculares/epidemiologia , Estudos de Casos e Controles , Criança , Pré-Escolar , Comorbidade , Estudos Transversais , Diabetes Mellitus/epidemiologia , Dislipidemias/epidemiologia , Feminino , França/epidemiologia , Humanos , Masculino , Pessoa de Meia-Idade , Obesidade/epidemiologia , Fatores de Risco , Pele/patologia , Adulto JovemRESUMO
BACKGROUND: Adherence to topical corticosteroids (TCS) is essential for the effective treatment of atopic dermatitis but can be limited by concerns about their use. This study examined the feasibility of applying the validated TOPICOP score for assessing TCS phobia across different countries. METHODS: This was a prospective multicentre feasibility study conducted in 21 hospitals in 17 countries. Patients >3 months of age with atopic dermatitis or their parents or legal representatives completed a validated translation of the TOPICOP questionnaire in the country's native language. Respondents also completed questionnaires collecting opinions about the feasibility and acceptability of the TOPICOP questionnaire. RESULTS: A total of 1564 participants in 15 countries were included in the analysis. 81% of respondents considered the questions clear or very clear, and 79% reported that it took less than 5 minutes to complete. Each of the individual items in the TOPICOP questionnaire was considered to be not at all difficult to answer by 49% to 74% of participants. The mean global TOPICOP score was 44.7%±20.5. Mean TOPICOP subscores were 37.0±22.8% for knowledge and beliefs, 54.7±27.8% for fears and 50.1±29.1% for behaviours. Global scores and subscores differed between countries, although the subscores did not always vary in parallel, suggesting different levels of TCS phobia and different drivers for each country. CONCLUSIONS: The TOPICOP score can be feasibly applied across countries and may therefore be useful for obtaining qualitative and quantitative data from international studies and for adapting patient education and treatment.
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Corticosteroides/uso terapêutico , Dermatite Atópica/tratamento farmacológico , Transtornos Fóbicos , Administração Tópica , Criança , Pré-Escolar , Dermatite Atópica/psicologia , Estudos de Viabilidade , Humanos , Lactente , Estudos Prospectivos , Inquéritos e QuestionáriosRESUMO
Within their first days of life, newborns' skin undergoes various adaptation processes needed to accommodate the transition from the wet uterine environment to the dry atmosphere. The skin of newborns and infants is considered as a physiological fragile skin, a skin with lower resistance to aggressions. Fragile skin is divided into four categories up to its origin: physiological fragile skin (age, location), pathological fragile skin (acute and chronic), circumstantial fragile skin (due to environmental extrinsic factors or intrinsic factors such as stress) and iatrogenic fragile skin. Extensive research of the past 10 years have proven evidence that at birth albeit showing a nearly perfect appearance, newborn skin is structurally and functionally immature compared to adult skin undergoing a physiological maturation process after birth at least throughout the first year of life. This article is an overview of all known data about fragility of epidermis in 'fragile populations': newborns, children and adolescents. It includes the recent pathological, pathophysiological and clinical data about fragility of epidermis in various dermatological diseases, such as atopic dermatitis, acne, rosacea, contact dermatitis, irritative dermatitis and focus on UV protection.
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Epiderme/fisiologia , Adaptação Fisiológica , Adolescente , Células Cultivadas , Criança , Células Epidérmicas , Humanos , Recém-Nascido , Queratinócitos/citologiaRESUMO
BACKGROUND: The prevalence of childhood psoriasis is estimated at between 0.4% and 0.7%. Clinical aspects of the diseases depend on age. The aim of this study was to investigate the clinical aspects of psoriasis according to age and sex. PATIENTS AND METHODS: A cross-sectional, multicentre study of children with psoriasis was performed by investigators belonging to the Research Group of the French Society of Paediatric Dermatology. The study was conducted from April 2012 to March 2013. Inclusion criteria were age less than 18 years and clinical diagnosis of psoriasis. The children were classified into 3 groups by age: infants: <2 years; children: ≥2 years and <13 years; adolescents≥13 years. The information collected included demographic data, clinical, epidemiological, and therapeutic aspects of the psoriasis, as well as analysis of comorbidities. RESULTS: Three hundred and thirteen children were included: 27 (8.6%) infants, 207 (66.1%) children, and 79 (25.2%) adolescents. Plaque psoriasis was the most frequent clinical type of psoriasis seen in children and adolescents (>41%), but it accounted for only 25.9% of psoriasis of infants (P<0.0001). Napkin psoriasis (37.0%) and inverse psoriasis (22.2%) were the most common forms of psoriasis seen in infants and were described significantly more frequently in this group than in the two other groups (P<0.003). Nail involvement was more common in adolescents (37.2%, P=0.03) and children (32.9%) than in infants (14.8%) and affected boys more than girls (43.6% vs 22.0%, P<0.0001). Girls presented scalp psoriasis more frequently (17.7% vs 8.7%, P=0.02). Local vitamin-D treatment and systemic therapies were used more frequently in children and adolescents than in infants. There was no significant difference for treatment use, including for acitretin, according to gender. DISCUSSION: Plaque psoriasis was the most common clinical type of psoriasis in children but affected less than 50% of the children. Age had a significant impact on extra-cutaneous skin disorders and on treatment used, while sex had little incidence. The frequency of comorbidities was not affected by age. CONCLUSION: Childhood psoriasis thus presents specific characteristics dependent on the age of the child. The results of studies exclusively dealing with adults cannot be extrapolated to children.