Paediatric-onset lymphomatoid papulosis: results of a multicentre retrospective cohort study on behalf of the EORTC Cutaneous Lymphoma Tumours Group (CLTG).

BACKGROUND: Lymphomatoid papulosis (LyP) is a rare cutaneous T-cell lymphoproliferative disorder. Comprehensive data on LyP in the paediatric population are scarce. OBJECTIVES: To characterize the epidemiological, clinical, histopathological and prognostic features of paediatric LyP. METHODS: This was a retrospective multicentre international cohort study that included 87 children and adolescents with LyP diagnosed between 1998 and 2022. Patients aged ≤ 18 years at disease onset were included. LyP diagnosis was made in each centre, based on clinicopathological correlation. RESULTS: Eighty-seven patients from 12 centres were included. Mean age at disease onset was 7.0 years (range 3 months-18 years) with a male to female ratio of 2 : 1. Mean time between the onset of the first cutaneous lesions and diagnosis was 1.3 years (range 0-14). Initial misdiagnosis concerned 26% of patients. LyP was most often misdiagnosed as pityriasis lichenoides et varioliformis acuta, insect bites or mollusca contagiosa. Erythematous papules or papulonodules were the most frequent clinical presentation. Pruritus was specifically mentioned in 21% of patients. The main histological subtype was type A in 55% of cases. When analysed, monoclonal T-cell receptor rearrangement was found in 77% of skin biopsies. The overall survival rate was 100%, with follow-up at 5 years available for 33 patients and at 15 years for 8 patients. Associated haematological malignancy (HM) occurred in 10% of cases (n = 7/73), including four patients with mycosis fungoides, one with primary cutaneous anaplastic large cell lymphoma (ALCL), one with systemic ALCL and one with acute myeloid leukaemia. If we compared incidence rates of cancer with the world population aged 0-19 years from 2001 to 2010, we estimated a significantly higher risk of associated malignancy in general, occurring before the age of 19 years (incidence rate ratio 87.49, 95% confidence interval 86.01-88.99). CONCLUSIONS: We report epidemiological data from a large international cohort of children and adolescents with LyP. Overall, the disease prognosis is good, with excellent survival rates for all patients. Owing to an increased risk of associated HM, long-term follow-up should be recommended for patients with LyP.

Lymphomatoid papulosis is a very rare skin condition caused by an abnormal increase in white blood cells (called 'lymphocytes') in the skin. The condition rarely affects children, so most of the scientific data published about this disease focuses on adults. This study involved 12 academic dermatology centres in Europe, the Middle East and North America, and gathered data from about 87 children who presented with symptoms of lymphomatoid papulosis before the age of 19 years. The aim of this study was to better describe this disease in the paediatric population and discuss its treatment options and evolution. We found that the presentation of the disease in children is roughly the same as in adults. Safe and effective treatment options exist. The disease is not life threatening, but it requires investigation by a dermatologist, both to make a careful diagnosis and to monitor it as sometimes associated cancers that originate from blood cells can occur, mostly on the skin.

Association between filaggrin gene mutations and the clinical features of molluscum contagiosum: The Yamanashi Adjunct Study of the Japan Environment and Children's Study.

Previous studies have reported swimming, atopic dermatitis, and filaggrin (FLG) gene mutations as risk factors for molluscum contagiosum (MC) infection. FLG gene mutations impair skin barrier function. The aim of this study was to determine the impact of FLG mutations on the incidence and clinical features of MC. We used data from 2036 children who participated in the Yamanashi Adjunct Study of the Japan Environment and Children's Study, a prospective, birth cohort study. A questionnaire for caregivers (when children were 4 and 8 years of age) asked about clinical features including previous MC incidence and treatment, number of MC lesions at first visit, and time to resolution. Participants underwent genotyping to detect six FLG mutations that are common in the Japanese population. A logistic regression model was used to analyze the association between MC incidence and FLG mutations, adjusted for potential confounders. The cumulative incidence of MC at age 8 years was 47.1%. Among participants with a history of MC, 67.6% had undergone curettage. FLG mutation was a significant risk factor for MC incidence (adjusted odds ratio [aOR] 1.69, 95% confidence interval [CI] 1.18-2.42). Swimming and atopic dermatitis were also significant risk factors for MC. There was no significant association between FLG mutation and the number of MC lesions at the first visit or the time to resolution of lesions. FLG mutation is a risk factor for MC incidence; however, FLG mutations do not affect the number of MC lesions at presentation or the time to resolution.

Molluscum Contagiosum Virus Evasion of Immune Surveillance: A Review.

BACKGROUND: Molluscum contagiosum (MC) is an acute infection caused by the molluscum contagiosum virus (MCV) with a worldwide incidence of approximately 8,000 cases per 100,000 individuals annually. Greater than 90% of MC cases occur in the pediatric population, and affected adults are more likely to be younger or immunocompromised. MC has minimal inflammation initially; however, a strong inflammatory response can occur during resolution of the infection, termed the beginning of the end (BOTE). MC infections may last months to years, and it is hypothesized that persistent infections may be due to suppression of immunity by MCV proteins, thus affecting MC’s clinical progression. OBJECTIVE: We reviewed the current proposed mechanisms of MCV immune evasion and discuss potential therapeutic options for MC treatment. METHODS: A literature search was conducted using electronic databases (Pubmed, Google Scholar, Medline). RESULTS: We compiled 18 original research articles and identified 11 proteins produced by MCV that are postulated to participate in evasion of host immunity through various molecular pathways. These proteins and/or their downstream pathways may be influenced by MC treatments in phase 3 development, including berdazimer gel 10.3% and VP-102 cantharidin, 0.7%. CONCLUSION: MCV is distinctive in evading immune surveillance by inhibiting or dampening several immune pathways via the production of viral proteins. The result is decreasing local inflammatory response which contributes to the prolonged survival of MCV in the epidermis. Persistent MC can be a nuisance for some patients and treatment may be desired. Currently, no treatment has been approved by the US Food and Drug Administration (FDA). Two approaches in the pipeline may affect the immune avoidance mechanisms; nevertheless, their exact mechanisms between the potential therapeutics and viral proteins remain enigmatic. J Drugs Dermatol. 2023;22(2):182-189. doi:10.36849/JDD.7230.

Demographic and clinic characteristics and risk factors of molluscum contagiosum in children.

OBJECTIVE: To address the gap in evidence related to molluscum contagiosum in children by focusing on demographic and clinical features as well as risk factors. Methods: The multicentre, prospective, clinical study was conducted at four hospitals in Ankara and Tokat cities of Turkey from August 1, 2014, to August 5, 2019, and comprised patients aged ≤18 years diagnosed with molluscum contagiosum. Data about demographics, day nursery and preschool attendance, the seasons when the disease occurred, any use of Turkish baths and swimming pools, history of personal/familial atopy, coexistence of diseases, disease duration, courses, number of lesions and anatomic localisation. Data was analysed using SPSS 19. RESULTS: Of the 286 patients, 130(45.5%) were girls and 156(54.5%) were boys. The overall mean age was 5.94±3.95 years. The median duration of the disease was 5 weeks (interquartile range: 3.00-12.00 weeks). There was a significant number of cases with family history 18(48.6%) in the 0-3 age group (p=0.027). History of personal atopy was significantly high in the winter season (p<0.05). Patients with >20 lesions had used swimming pools significantly more frequently than the rest (p=0.042). The trunk was the most commonly involved region 162(56.6%). CONCLUSIONS: Providing prospective data about demographics, clinical characteristics and risk factors of molluscum contagiosum in children will lead to appropriate preventive and therapeutic measures.

Prevalence of Common Viral Skin Infections in Beach Volleyball Athletes.

Viral skin infections often affect the sports community. The aim of this study was to assess the rates, location sites, and seasons of appearance of common viral cutaneous diseases in beach volleyball athletes in Greece. Five hundred and forty-nine beach volleyball athletes participated in this study. The average age was 28.4 years. The viral infections were herpes simplex (type 1), molluscum contagiosum and warts. The measured parameters included: gender, age, the season when athletes may be more susceptible to infections and the location of infection in the body. Practicing information such as the number of training years, number of weekly trainings, and average hours of daily training was also recorded. Incidence rates correlated in relation to age: (a) warts (p < 0.001), molluscum contagiosum (p < 0.001), and herpes simplex (p = 0.001); (b) years of training: warts (p < 0.001), molluscum contagiosum (p < 0.001), and herpes simplex (p = 0.004); (c) average hours of daily training: molluscum contagiosum (p = 0.006) and herpes simplex (p < 0.010). The skin is the largest organ, and the risk of infection should not be underestimated. Prevention, early detection, recognition, and treatment are related to health and athletic performance, but also to the risk of transmission.

Mucocutaneous manifestations of human immunodeficiency virus (HIV) infection in children in relation to the degree of immunosuppression.

BACKGROUND: Human immunodeficiency virus (HIV) infection in children is becoming a common occurrence. Worldwide, limited studies have been done on the mucocutaneous manifestations in HIV-positive children. The aim of our study was to analyze the spectrum of mucocutaneous manifestations of pediatric HIV infection and correlate to degree of immunosuppression. MATERIAL AND METHODS: One hundred and sixty-five children under 18 years with HIV, who presented to the departments of dermatology and pediatrics, were examined for mucocutaneous manifestations. Patients were classified into four groups of immunodeficiency such as normal, mild, advanced, and severe, based on NACO guidelines of immunosuppression. The most recent CD4 count (within 6 months of study period) was considered. RESULTS: One hundred and sixty-five patients were examined, and skin manifestations were seen in 100 (61%) of them.The highest incidence of mucocutaneous manifestations was in 6-10 age group. Papular pruritic eruptions (PPE) (16%) was the most common condition, with highest prevalence in severe CD4 category (38%). Molluscum contagiosum (MC) (10%) was the most common infectious condition, with highest prevalence in advanced CD4 category (14%). Severe cutaneous adverse reactions (SCAR) caused by nevirapine were seen in three children. The percentage of skin manifestations was highest in the advanced (107%) and severe (100%) CD4 category. There was no significant difference in manifestations between those who were on antiretroviral therapy (ART) and those not. CONCLUSION: The percentage of skin manifestations increased with degree of CD4 depletion. PPE was found to be the hallmark of severe immunosuppression. However, opportunistic infections did not correlate with severity of immunodeficiency.

Infectious Disease in Contact Sports.

CONTEXT:: Infections are common in contact sports. This review aims to describe the epidemiology, presenting signs and symptoms, treatment guidelines, and regulations for several common infections seen in contact sport athletes. The conditions discussed include bacterial skin infections, herpes simplex virus, molluscum contagiosum, common warts, tinea, scabies, head lice, conjunctivitis, human immunodeficiency virus, hepatitis C virus, and vaccine-preventable illnesses. EVIDENCE ACQUISITION:: Searches were performed across PubMed and MEDLINE research databases. In addition, general internet search engine results and reviews of reference lists of relevant papers were used to identify additional sources of evidence. STUDY DESIGN:: Clinical review. LEVEL OF EVIDENCE:: Level 4. RESULTS:: The most common infections seen in contact sport athletes include bacterial skin infections, herpes simplex virus, molluscum contagiosum, common warts, tinea, scabies, head lice, conjunctivitis, and vaccine-preventable illnesses. Other infections, including human immunodeficiency virus and hepatitis C, are uncommon but potentially life threatening. CONCLUSION:: Infections are common in contact sport athletes. The provider who cares for these athletes should be aware of the most common infections and their appropriate management. Early diagnosis and appropriate clinical management are important for treating the infected athlete, minimizing risk of transmission, minimizing time lost from competition, and preventing large outbreaks.

A study of skin disease spectrum occurring in Angola phototype V-VI population in Luanda.

BACKGROUND: Prevalence of skin diseases in Luanda (Angola) is unknown, and publications are barely found in the literature. We aim to describe, for the first time, the frequency of skin disease spectrum in phototype V-VI Angolan population in Luanda City. METHODS: We included Fitzpatrick phototype V-VI Angolan patients who consulted the Dermatology Unit in Luanda Medical Center during a 1-year period. Medical information was recovered from the electronic database, and diagnoses were based on ICD-10. Only the main complaint was registered, and the results were classified according to age and sex. Criteria exclusion consisted of incomplete clinical records, Fitzpatrick phototype I-IV Angolan, or foreign patients from the study. RESULTS: From a total of 3938 patients, 3554 met the inclusion criteria, of which 2742 were adults 13 years or older. In this group, acne (23.6%), dermatophytosis (11.0%), and pityriasis versicolor (8.6%) were the main complaints. On the other hand, in the pediatric population (n = 812), atopic dermatitis (29.4%), tinea capitis (13.7%), and molluscum contagiosum (12.5%) were the most frequent disorders. In adult females, acne (31.3%) was the main condition, while in adult males, dermatophytosis (13.5%). In children, the frequency of atopic dermatitis was comparable: 29.1% and 28.6% in girls and boys, respectively. CONCLUSIONS: We published for the first time the frequency of the skin disease spectrum in Fitzpatrick phototype V-VI Angolan population in Luanda City, highlighting the prevalence of acne, dermatophytosis, and atopic dermatitis.

Molluscum Contagiosum: An Update.

BACKGROUND: Molluscum contagiosum is a viral cutaneous infection in childhood that occurs worldwide. Physicians should familiarize themselves with this common condition. OBJECTIVE: To review in depth the epidemiology, pathophysiology, clinical manifestations, complications and, in particular, treatment of molluscum contagiosum. METHODS: A PubMed search was completed in Clinical Queries using the key term "molluscum contagiosum". Patents were searched using the key term "molluscum contagiosum" from www.google.com/patents, http: //espacenet.com, and www.freepatentsonline.com. RESULTS: Molluscum contagiosum is caused by a poxvirus of the Molluscipox genus. Preschool and elementary school-aged children are more commonly affected. The virus is transmitted by close physical contact, autoinoculation, and fomites. Typically, molluscum contagiosum presents as asymptomatic, discrete, smooth, flesh-colored, dome-shaped papules with central umbilication from which a plug of cheesy material can be expressed. Some authors suggest watchful waiting of the lesions.Many authors suggest active treatment of lesions for cosmetic reasons or concerns of transmission and autoinoculation. Active treatments may be mechanical (e.g. cryotherapy, curettage, pulsed dye laser therapy), chemical (e.g. cantharidin, potassium hydroxide, podophyllotoxin, benzoyl peroxide, tretinoin, trichloroacetic acid, lactic acid, glycolic acid, salicylic acid), immune-modulating (e.g. imiquimod, interferon-alpha, cimetidine) and anti-viral (e.g. cidofovir). Recent patents related to the management of molluscum contagiosum are also retrieved and discussed. These patents comprise of topical compositions and herbal Chinese medicine with limited documentation of their efficacy. CONCLUSION: The choice of treatment method should depend on the physician's comfort level with the various treatment options, the patient's age, the number and severity of lesions, location of lesions, and the preference of the child/parents. In general, physical destruction of the lesion, in particular, cryotherapy with liquid nitrogen and chemical destruction with cantharidin are the methods of choice for the majority of patients.

Clinico-Epidemiological Profile of Viral Sexually Transmitted Infections in Seropositive Patients Attending a Tertiary Care Hospital in North India.

Sexually transmitted diseases are a major public health problem both in developing and in developed countries, and especially with the co-synergy with HIV infection, there is an increasing need to have a proper understanding of the clinicodemographic patterns of sexually transmitted infections (STIs) for planning and implementing control strategies. Worldwide, there is an increased preponderance of viral STIs. Increasing incidence and altered clinical presentation of viral STIs in patients with HIV pose a diagnostic challenge; thereby, we studied the demographic profile of HIV-seropositive patients and compared clinical manifestations of viral STIs in HIV-seropositive patients to those in seronegative individuals. Twenty-seven HIV-seropositive patients with viral STI (herpes/molluscum/warts) and same number of age-, sex-, and STI-matched seronegative patients were studied for variability in clinical profile. There were significant differences in the demographic factors (education, income, and migration) and sexual practices (number of contacts and source of infection) in the 2 groups. Lesional symptoms, increased extent of lesions, and resistance to treatment were significantly more common in HIV-seropositive patients.

Clinical and Demographic Characteristics of Patients with Molluscum Contagiosum Treated at the University Dermatology Clinic Maribor in a 5-year period.

Molluscum contagiosum virus (MCV) is a common skin pathogen in both adults and children. In this prospective study, we clinically evaluated consecutive patients with molluscum contagiosum (MC) who had been examined during a 5-year period at the second-largest dermatology clinic in Slovenia and described their main demographic and clinical characteristics, concomitant diseases, and treatment success. The study included 188 patients, of which 121 (64%) were men and 67 (36%) were women. A total of 135 (72%) patients were adults, with lesions that were most commonly located in the anogenital region (98%) and were probably sexually acquired. Two adult patients were diagnosed with concurrent human immunodeficiency virus (HIV) infection. Fifty-three (28%) patients were children with a mean age of 5.7 years, most commonly presenting with lesions on the torso and extremities (85%). In adults, the infection most commonly occurred in male patients, while in children it was slightly more common in female patients. At presentation, 58% of patients had more than 5 MC lesions. A total of 30% of the included children had concomitant atopic dermatitis. We did not observe an increased occurrence of MCV infection in patients with atopic dermatitis. All patients were treated with curettage of the lesions. The cure rate at the first follow-up visit after 2 months was relatively high (63%), and recurrences were not associated with the number or site of lesions at presentation or with concomitant atopic dermatitis.

Molluscum contagiosum and associations with atopic eczema in children: a retrospective longitudinal study in primary care.

BACKGROUND: Molluscum contagiosum (MC) is a common skin condition in children. Consultation rates and current management in primary care, and how these have changed over time, are poorly described. An association between the presence of atopic eczema (AE) and MC has been shown, but the subsequent risk of developing MC in children with a diagnosis of AE is not known. AIM: To describe the consultation rate and management of MC in general practice in the UK over time, and test the hypothesis that a history of AE increases the risk of developing MC in childhood. DESIGN AND SETTING: Two studies are reported: a retrospective longitudinal study of MC cases and an age-sex matched case-cohort study of AE cases, both datasets being held in the UK Clinical Practice Research Datalink from 2004 to 2013. METHOD: Data of all recorded MC and AE primary care consultations for children aged 0 to 14 years were collected and two main analyses were conducted using these data: a retrospective longitudinal analysis and an age-sex matched case-cohort analysis. RESULTS: The rate of MC consultations in primary care for children aged 0 to 14 years is 9.5 per 1000 (95% CI = 9.4 to 9.6). The greatest rate of consultations for both sexes is in children aged 1-4 years and 5-9 years (13.1 to 13.0 (males) and 13.0 to 13.9 (females) per 1000 respectively). Consultation rates for MC have declined by 50% from 2004 to 2013. Children were found to be more likely to have an MC consultation if they had previously consulted a GP with AE (OR 1.13; 95% CI = 1.11 to 1.16; P<0.005). CONCLUSION: Consultations for MC in primary care are common, especially in 1-9-year-olds, but they declined significantly during the decade under study. A primary care diagnosis of AE is associated with an increased risk of a subsequent primary care diagnosis of MC.

Molluscum contagiosum: to treat or not to treat? Experience with 170 children in an outpatient clinic setting in the northeastern United States.

Despite the high prevalence of molluscum contagiosum (MC) in children, epidemiologic data on this common self-limited viral infection is limited. In this report we review our experience with the demographic characteristics, clinical characteristics, management, and time to resolution of MC in 170 children. A retrospective medical chart review and telephone survey were conducted on children younger than 16 years of age evaluated for MC in the Division of Pediatric Dermatology at the Johns Hopkins Children's Center, Baltimore, Maryland, from January 1, 2008, to December 31, 2011. Of 170 children with MC, 51.8% were female and 77.1% were Caucasian. The median age at diagnosis was 5 years and 46.5% had a history of atopic dermatitis (AD). Children with AD had significantly more MC lesions than those without (p < 0.05); 72.9% of children did not receive any treatment. MC lesions completely cleared within 12 months in 45.6% of treated and 48.4% of untreated children and within 18 months in 69.5% of treated and 72.6% of untreated children. Treatment (if any), sex, race, diagnosing physician, number of lesions at diagnosis, number of anatomic locations, or history of AD did not predict time to resolution of MC lesions. MC lesions completely resolved in approximately 50% of children within 12 months and in 70% within 18 months. Treatment did not shorten the time to resolution.

Time to resolution and effect on quality of life of molluscum contagiosum in children in the UK: a prospective community cohort study.

BACKGROUND: Molluscum contagiosum is one of the 50 most prevalent diseases worldwide, but scarce epidemiological data exist for childhood molluscum contagiosum. We aimed to describe the time to resolution, transmission to household child contacts, and effect on quality of life of molluscum contagiosum in children in the UK. METHODS: Between Jan 1, and Oct 31, 2013, we recruited 306 children with molluscum contagiosum aged between 4 and 15 years in the UK either by referral by general practitioner or self-referral (with diagnosis made by parents by use of the validated Molluscum Contagiosum Diagnostic Tool for Parents [MCDTP]). All participants were asked to complete a questionnaire at recruitment about participant characteristics, transmission, and quality of life. We measured quality of life with the Children's Dermatology Life Quality Index (CDLQI). Participants were prospectively followed up every month to check on their recovery from molluscum contagiosum and transmission to other children in the same household, until the child's lesions were no longer visible. FINDINGS: The mean time to resolution was 13·3 months (SD 8·2). 80 (30%) of 269 cases had not resolved by 18 months; 36 (13%) had not resolved by 24 months. We recorded transmission to other children in the household in 102 (41%) of 250 cases. Molluscum contagiosum had a small effect on quality of life for most participants, although 33 (11%) of 301 participants had a very severe effect on quality of life (CDLQI score >13). A greater number of lesions was associated with a greater effect on quality of life (H=55·8, p<0·0001). INTERPRETATION: One in ten children with molluscum contagiosum is likely to have a substantial effect on their quality of life and therefore treatment should be considered for some children, especially those with many lesions or who have been identified as having a severe effect on quality of life. Patients with molluscum contagiosum and their parents need to be given accurate information about the expected natural history of the disorder. Our data provide the most reliable estimates of the expected time to resolution so far and can be used to help set realistic expectations. FUNDING: Wales School of Primary Care Research (WSPCR) and Cardiff University.

Development and validation of the Molluscum Contagiosum Diagnostic Tool for Parents: diagnostic accuracy study in primary care.

BACKGROUND: Molluscum contagiosum (MC) is diagnosed by its distinct appearance. Parental diagnosis of MC may reduce anxiety and lead to reductions in healthcare consultations, and may be particularly useful in large-scale epidemiological studies. However, there are currently no published, validated tools allowing parental diagnosis of MC. AIM: To develop and validate a tool for parental diagnosis of MC. DESIGN AND SETTING: The Molluscum Contagiosum Diagnostic Tool for Parents (MCDTP) was developed and its diagnostic accuracy was compared with GP diagnosis in 12 GP surgeries in South Wales. METHOD: Following development, which involved three phases with dermatologists, nurses, GPs, and parents, parents completed the MCDTP (index test) in the practice waiting room, and rated their confidence in their diagnosis. A GP then examined their child for MC (reference test). Test characteristics were calculated for all responders and for those who expressed being confident or very confident in their diagnosis. RESULTS: A total of 203 parents completed the MCDTP. The MCDTP showed a sensitivity of 91.5% (95% confidence intervals (CI) = 81.3 to 97.2) and a specificity of 88.2% (95% CI = 81.8 to 93.0) in all parents and a sensitivity of 95.8% (95% CI = 85.7 to 99.5) and a specificity of 90.9% (95% CI = 83.9 to 95.6) in parents who were confident or very confident in their diagnosis. The positive predictive value was 76.1% (95% CI = 64.5 to 85.4) and negative predictive value was 96.2% (95% CI = 91.4 to 98.8) for all parents. CONCLUSION: The MCDTP performed well compared with GP diagnosis and is suitable for clinical use by parents and in population-based studies.

Molluscum contagiosum in a pediatric American Indian population: incidence and risk factors.

BACKGROUND: Molluscum contagiosum virus (MCV) causes an innocuous yet persistent skin infection in immunocompetent individuals and is spread by contact with lesions. Studies point to atopic dermatitis (AD) as a risk factor for MCV infection; however, there are no longitudinal studies that have evaluated this hypothesis. METHODS: Outpatient visit data from fiscal years 2001-2009 for American Indian and Alaska Native (AI/AN) children were examined to describe the incidence of molluscum contagiosum (MC). We conducted a case-control study of patients <5 years old at an Indian Health Service (IHS) clinic to evaluate dermatological risk factors for infection. RESULTS: The incidence rate for MC in children <5 years old was highest in the West and East regions. MC cases were more likely to have a prior or co-occurring diagnosis of eczema, eczema or dermatitis, impetigo, and scabies (p<0.05) compared to controls; 51.4% of MC cases had a prior or co-occurring diagnosis of eczema or dermatitis. CONCLUSIONS: The present study is the first demonstration of an association between AD and MC using a case-control study design. It is unknown if the concurrent high incidence of eczema and MC is related, and this association deserves further investigation.

Epidemiology of molluscum contagiosum in children: a systematic review.

BACKGROUND: Molluscum contagiosum (MC) is a common skin condition that primarily affects children, a common reason for presenting in primary care and is commonly seen in children presenting with other conditions in primary and secondary care. It is usually asymptomatic but can present with pain, pruritus, erythema and bacterial superinfection. Aim. To synthesize the current epidemiology of MC. Design and setting. A systematic literature review of bibliographical databases on the prevalence, incidence, risk factors, age distribution and association with other conditions for MC in children. RESULTS: Data on the epidemiology of MC is largely of poor quality. The largest incidence is in children aged between 0 and 14 years, where the incidence rate ranged from 12 to 14 episodes per 1000 children per year. Incidence rates in the UK were highest in those aged 1-4 years. Meta-analysis suggests a point prevalence in children aged 0-16 years of between 5.1% and 11.5%. There is evidence for an association between swimming and having MC and MC is more common in those with eczema; however, there is little evidence for other risk factors. CONCLUSIONS: MC is a common condition, with the greatest incidence being in those aged 1-4 years. Swimming and eczema are associated with the presence of MC, but the causal relationships are unclear. There is a lack of data regarding the natural history of MC and published data are insufficient to determine temporal or geographic patterns in incidence, risk factors, duration of symptoms or transmission between family members.

Understanding U.S. healthcare providers' practices and experiences with molluscum contagiosum.

INTRODUCTION: Molluscum contagiosum is a common superficial skin infection caused by the poxvirus, Molluscum Contagiosum virus. The study objective is to obtain a better understanding of physician practices and experiences with molluscum contagiosum in order to focus informational and guidance material. METHODS: A cross-sectional survey to assess medical practitioners' knowledge and practices with molluscum contagiosum was conducted using the 2009 DocStyles survey. Questions regarding category and number of molluscum contagiosum patients seen, treatments used and advice given to patients were included in the survey. RESULTS: Dermatologists saw the most cases, with the majority seeing 51-100 molluscum contagiosum cases/year. The most common cases seen were children with multiple lesions and adults with genital lesions. Respondents were most likely to recommend treatment to immunocompromised individuals, HIV patients, adults with genital lesions and children with multiple lesions. Cryotherapy was the top choice for all specialties with the exception of OB/GYNs, whose top choice was curettage. "Avoid intimate contact until lesions resolve", "Avoid touching lesions to reduce further spread", and "Don't be concerned, this will go away" were the top advice choices. DISCUSSION: Most survey respondents have dealt with molluscum contagiosum in their practice during the previous year. Overall, respondents picked appropriate choices for treatment and advice given; however some ineffective or unnecessary treatments were chosen and recommendations to prevent spread were chosen infrequently. Knowledge gaps for appropriate transmission precaution advice might cause unnecessary spread or autoinoculation. This survey has demonstrated that molluscum contagiosum is a common infection seen by many types of practitioners and therefore guidance on treatment considerations and infection control is valuable.

[Molluscum contagiosum--a common but poorly understood "childhood disease" and sexually transmitted illness]. / Mollusca contagiosa (Dellwarzen). Eine häufige, aber wenig bekannte "Kinderkrankheit" und sexuell übertragene Erkrankung.

Molluscum contagiosum is a viral disease of the skin characterized by discrete, multiple, flesh-colored papules. It is caused by a highly infectious, enveloped deoxyribonucleic acid virus, called molluscum contagiosum virus (MCV). Molluscum contagiosum is very common in children, sexually active adults and immunocompromised patients, especially those who are infected with the human immunodeficiency virus. MCV transmission usually takes place through direct skin-to-skin contact. Infections in childhood are often linked to swimming-pool attendance. Adults are infected usually through sexual contact. An intimate skin-to-skin contact is sufficient for transmission of the virus. In immunocompetent adults, the warts remain in the genital area and adjacent regions of the skin. In children and patients with immunocompromised conditions, however, various regions of the body are usually affected. Therapy of molluscum contagiosum should be undertaken in an individualized manner, a specific treatment does not exist. For the treatment, physical methods such as curettage and cryotherapy, topic acids (e. g., acetic acid) and alkalis (e. g., potassium hydroxide), some other topical agents such as cantharidin and imiquimod, as well as several systemic agents the pharmacological treatments is, however, sparse. Effective prevention is problematic due to the high infectivity of the virus. A vaccine is not available.