Altered skin microbiome, inflammation, and JAK/STAT signaling in Southeast Asian ichthyosis patients.

BACKGROUND: Congenital ichthyosis (CI) is a collective group of rare hereditary skin disorders. Patients present with epidermal scaling, fissuring, chronic inflammation, and increased susceptibility to infections. Recently, there is increased interest in the skin microbiome; therefore, we hypothesized that CI patients likely exhibit an abnormal profile of epidermal microbes because of their various underlying skin barrier defects. Among recruited individuals of Southeast Asian ethnicity, we performed skin meta-genomics (i.e., whole-exome sequencing to capture the entire multi-kingdom profile, including fungi, protists, archaea, bacteria, and viruses), comparing 36 CI patients (representing seven subtypes) with that of 15 CI age-and gender-matched controls who had no family history of CI. RESULTS: This case-control study revealed 20 novel and 31 recurrent pathogenic variants. Microbiome meta-analysis showed distinct microbial populations, decreases in commensal microbiota, and higher colonization by pathogenic species associated with CI; these were correlated with increased production of inflammatory cytokines and Th17- and JAK/STAT-signaling pathways in peripheral blood mononuclear cells. In the wounds of CI patients, we identified specific changes in microbiota and alterations in inflammatory pathways, which are likely responsible for impaired wound healing. CONCLUSIONS: Together, this research enhances our understanding of the microbiological, immunological, and molecular properties of CI and should provide critical information for improving therapeutic management of CI patients.

Extracorporeal Photopheresis in Dermatological Diseases.

Extracorporeal photopheresis (ECP) is an apheresis procedure that is conventionally used as a first-line treatment for cutaneous and leukemic subtypes of T-cell lymphoma, such as Sezary's syndrome and mycosis fungoides. Over the past three decades, its immunotherapeutic properties have been tested on a variety of autoimmune conditions, including many dermatologic diseases. There is ample evidence of ECP's ability to modify leukocytes and alter cytokine production for certain dermatologic diseases that have been refractory to first-line treatments, such as atopic dermatitis. However, the evidence on the efficacy of ECP for the treatment of these dermatologic diseases is unclear and/or lacks sufficient evidence. The purpose of this paper is to review the literature on the utilization and clinical efficacy of ECP in the treatment of several [autoimmune] dermatologic diseases and discuss its applications, guidelines, recommendations, and future implementation for dermatologic diseases.

The collagen market and knowledge, attitudes, and practices of Brazilian consumers regarding collagen ingestion.

Collagen is considered a nutraceutical, and its consumption has been expanding due to the increased life expectancy, rising per capita income, and increased consumer awareness of health care. This study aimed to evaluate consumers' perceptions, knowledge, attitudes, and practices about the consumption of collagen-based products by using an online questionnaire and to correlate them with socio-economic data. A market survey (pharmacy stores and online) was also conducted to evaluate the available products. In total, 275 participants answered the survey, 73.3% from the Southeast region, mostly female (84.0%). Most participants reported three months as the period of collagen intake (31.6%), and the consumption period was associated with the perception of the health benefits (p < 0.001). Furthermore, the participants' knowledge and perceptions regarding collagen intake are frequently associated with dermatological and orthopedic changes. Collagen-based products supplementation is a growing market with a broad target audience (genders, age groups, and socio-economic levels). The commercial presentation of collagen has been diversified over the years, and powder collagen is the most consumed (52.7%) and cheapest compared with capsules, pills, or gummies. The results of the present study demonstrate that most consumers of this type of supplement associate its benefits with aesthetic care such as skin, hair, and nails, although the scientific literature has shown its effects in treating osteoarticular diseases, for example. Undoubtedly, the correct dose prescription, treatment time, and choice of product presentation must be analyzed carefully, as they significantly impact treatment results.

Dermatologic conditions of adult refugees following resettlement in the United States, 2015 to 2018.

Background: There is a paucity of literature regarding dermatologic conditions in migrant and refugee populations. Methods: We conducted a cross-sectional study of all adult refugees resettling in a region of Connecticut, U.S. from 7 January 2015 to 20 November 2018. We conducted a manual chart review to determine dermatologic conditions diagnosed during and within one year of resettlement. We used multivariable logistic regression to determine demographic and clinical factors associated with having any dermatologic condition. Results: We included 545 refugees primarily from Afghanistan (40.6%), Syria (24.6%) and Iraq (10.5%), with a median (interquartile range) age of 33 (28-40) years. Of the 545 participants, 213 (39.1%) had dermatologic conditions. Fifty-four participants (25%) had more than one dermatologic condition and 114 (53.5%) were diagnosed within the first month of resettlement. The most common categories of conditions were cutaneous infections (24.9%), inflammatory conditions (11.1%), and scar or burn (10.7%). Tobacco use was associated with having a cutaneous infection (OR 2.37, 95%CI:1.09-4.95), and younger age was associated with having a scar or burn (for each year increase in age, OR 0.95, 95%CI:0.91-0.99). Conclusion: Dermatologic conditions are common among adult refugees. The majority of conditions were diagnosed in the first month following resettlement suggesting that a high number of dermatologic conditions arise or go undetected and untreated during the migration process.

Optimal time for COVID-19 vaccination in rituximab-treated dermatologic patients.

Background: By depleting circulating B lymphocytes, rituximab time-dependently suppresses coronavirus disease 2019 (COVID-19) vaccines' humoral immunogenicity for a prolonged period. The optimal time to vaccinate rituximab-exposed immune-mediated dermatologic disease (IMDD) patients is currently unclear. Objective: To estimate the vaccination timeframe that equalized the occurrence of humoral immunogenicity outcomes between rituximab-exposed and rituximab-naïve IMDD patients. Methods: This retrospective cohort study recruited rituximab-exposed and age-matched rituximab-naïve subjects tested for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-specific immunity post-vaccination. Baseline clinical and immunological data (i.e., immunoglobulin levels, lymphocyte immunophenotyping) and SARS-CoV-2-specific immunity levels were extracted. The outcomes compared were the percentages of subjects who produced neutralizing antibodies (seroconversion rates, SR) and SARS-CoV-2-specific IgG levels among seroconverters. The outcomes were first analyzed using multiple regressions adjusted for the effects of corticosteroid use, steroid-spearing agents, and pre-vaccination immunological status (i.e., IgM levels, the percentages of the total, naïve, and memory B lymphocytes) to identify rituximab-related immunogenicity outcomes. The rituximab-related outcome differences with a 95% confidence interval (CI) between groups were calculated, starting by including every subject and then narrowing down to those with longer rituximab-to-vaccination intervals (≥3, ≥6, ≥9, ≥12 months). The desirable cut-off performances were <25% outcome inferiority observed among rituximab-exposed subgroups compared to rituximab-naïve subjects, and the positive likelihood ratio (LR+) for the corresponding outcomes ≥2. Findings: Forty-five rituximab-exposed and 90 rituximab-naive subjects were included. The regression analysis demonstrated a negative association between rituximab exposure status and SR but not with SARS-CoV-2-specific IgG levels. Nine-month rituximab-to-vaccination cut-off fulfilled our prespecified diagnostic performance (SR difference between rituximab-exposed and rituximab-naïve group [95%CI]: -2.6 [-23.3, 18.1], LR+: 2.6) and coincided with the repopulation of naïve B lymphocytes in these patients. Conclusions: Nine months of rituximab-to-vaccination interval maximize the immunological benefits of COVID-19 vaccines while avoiding unnecessary delay in vaccination and rituximab treatment for IMDD patients.

Epidemiology of dermatologic conditions among elderly patients at the Ambulatory Care Service of a Tertiary Hospital in Metro Manila from 2014 to 2018: A five-year review

Introduction@#Ageing is a progressive degenerative process that leads to decline in the physiological function and reserve capacity of the whole body system, including the skin. As the Filipino geriatric population escalates, the incidence of skin diseases becomes more widely acknowledged. Presently, there are only a few studies that have been reported locally describing the nature of geriatric dermatoses.@*Objectives@#To describe the epidemiology of dermatologic conditions among Filipino elderly patients that prompted a consult at the ambulatory care service of a tertiary hospital between the years 2014 and 2018.@*Methodology@#All Filipino elderly patients with dermatological conditions seen at the dermatology ambulatory care service from 2014 to 2018 was studied through a single-center, retrospective, descriptive study.@*Results@#Elderly patients comprised 16.76% of the total patients who sought dermatological consultation at the ambulatory care service of the hospital. Majority of the patients were females. Xerosis/xerotic eczema (10.02%) was the most frequently encountered skin disease. The top 10 diseases were irritant contact dermatitis (7.00%), lichen simplex chronicus (6.67%), psoriasis (5.56%), seborrheic dermatitis (5.24%), allergic contact dermatitis (4.37%), tinea pedis (3.51%), herpes zoster (3.49%), seborrheic keratosis (3.23%), and milia (2.54%). Based on the nature of disease, inflammatory condition was the most commonly seen.@*Conclusion@#Dermatological disorders are ubiquitous in older people with a significant impact on the quality of life. Inflammatory dermatoses comprise a wide array of skin diseases as evidenced in this study, which account for most of the cutaneous problems in the elderly. Similar to other epidemiological studies, xerosis/xerotic eczema still comprises majority of the cases prompting elderly patients to seek a dermatological consultation.

Impacts of COVID-19 Pandemic on Dermatology Outpatient Department at a Tertiary Hospital in Eastern China: A Pre-Post Study.

Background: The COVID-19 pandemic has considerable impact on health care system in the world directly. Although the pandemic has been effectively controlled, people's lifestyle, stress of job, economic status and health conditions have all changed. Therefore, it is unclear whether the COVID-19 pandemic has affected the distribution of diseases in dermatology outpatient department, especially in the post-pandemic era and how we should respond to these changes. Objective: We aimed to assess the impact of the COVID-19 pandemic on diagnosis of dermatology outpatient department in eastern China. Methods: A pre-post study design was a retrospective study to assess the changes of diseases diagnoses from the outpatient department of Dermatology, Taicang first people's hospital, Suzhou University, Suzhou, China in the 2021 (Post-COVID-19 pandemic) compared to the 2019 (Pre-COVID-19 pandemic). Statistical analysis was performed using the SPSS 23.0 and Excel 2010. The data were analysed by methods independent t-test and Pearson's chi-square test. A two-sided p-value of <0.05 was considered statistically significant. Results: A total of 67,994 patients in 2019 and 67,288 patients in 2021 were included in the study. During the pre-pandemic year, the most common diagnoses in the outpatient department were urticaria, fungal dermatitis, acne, herpes zoster, seborrheic dermatitis. Urticaria, acne, allergic dermatitis, fungal dermatitis, herpes zoster, were statistically more common in the post-pandemic period. Acne, animal-related diseases, allergic dermatitis, insect dermatitis, alopecia, and verruca vulgaris diagnoses were found to increase statistically during the post-pandemic period when compared with the pre-pandemic period. Conclusion: The COVID-19 pandemic had a minimal effect on the average yearly dermatology outpatients department visits, but the distribution of dermatology diagnoses was affected. As a result, governments and health departments may introduce innovative ways and training of medical teams according to the impact of the pandemic to ensure normal medical care.

Ambient temperature exposure and risk of outpatient visits for dermatologic diseases in Xinxiang, China: a time-series analysis.

The effect of ambient temperature on dermatologic diseases has received widespread attention. Previous studies have shown that ambient temperature might affect specific dermatologic diseases, but results were inconsistent. This study aims to assess the short-term effect of ambient temperature on outpatient visits due to dermatologic diseases (DMs) in Xinxiang, China. Daily DMs outpatient visits, mean temperature, mean relative humidity, and air pollution data of Xinxiang were retrieved from January 1, 2015, to December 31, 2018. A distributed lag nonlinear model (DLNM) was applied to analyze the effect of ambient temperature on DMs outpatients. We controlled several potential confounding factors such as the long-term trend, public holiday, day of the week, humidity, and air pollutants (NO2, PM2.5). Finally, two more stratification analysis was conducted by age and gender. A total of 164,270 outpatients of DMs were enrolled during our study, and the daily mean visits were 113. The estimated effect of temperature on DMs was nonlinear. Heat temperature would exacerbate outpatients of dermatologic diseases. With a reference median temperature (17 °C), the effect of temperature on DMs was most pronounced at lag0-14; exposure to heat (32 °C, 99th) was associated with 1.565 (95% CI: 1.266-1.934) increased risk of outpatients for DMs. Stratification analysis showed that citizens of young ages were susceptive to heat; both genders had a similar relationship between temperature and DMs risk. This study highlights that ambient temperature was associated with DMs outpatients; heat temperature might aggravate DMs risk. The health hazards of heat temperature required more attention, and more effective prevention measurements should be designed and implemented to curb global warming.

Knowledge, attitude, perception and practices of primary care physicians regarding common dermatological diseases: A cross-sectional study

Introduction@#Dermatologic diseases are one of the common reasons for consult in primary care. Primary care physicians such as the doctors to the barrios (DTTBs) assigned in geographically isolated areas play a critical role in providing primary skin health services since they are the first, and sometimes, only doctors patients rely on for consult. In managing skin diseases, adequate knowledge and skills are needed to arrive at a correct diagnosis, and a physician’s proper initial treatment and timely referral to dermatologists will lead to less affectation on quality of life. Identifying what is lacking in skin health services and referral system would aid dermatologists in finding out how to bridge the gap in knowledge and access to our specialized skin health care.@*Objectives@#The study aimed to determine the knowledge, attitudes, practices, and perceptions of primary care physicians in the Philippines regarding common dermatologic conditions.@*Methods@#This is a cross-sectional study that utilized a self-administered questionnaire to collect data from rural government primary care phy- sicians (doctors to the barrios). At the end of the study, the proponents collated the data and data analysis was done using STATA 13.1 guided by a statistician.@*Results@#A total of 118 DTTBs were included in the study. The mean age of the physicians is 28 years old. One-half of the physicians were assigned to low-income class municipalities; 26.85% and 25% are from 4th class and 5th class municipalities respectively. Factors such as age, sex and clinical experience were not associated with level of knowledge of the respondents. Majority or 55% of the primary care physicians were classified as hav- ing insufficient knowledge on common skin diseases. The respondents have an average of 250 consultations per week and 6% of these are derma- tologic diseases. The most common skin diseases they encountered were impetigo (46.61%), scabies (46.61%), contact dermatitis (43.22%), fungal infection (25.42%) and cellulitis (20.34%). The most prescribed and available medications for skin diseases are oral and systemic antibiotics. Only 42.37% of the physicians are able to refer to dermatologists through various online communication platforms while the rest refer through phone calls or advise their patients to seek dermatologic consult. 25% of the respondents have direct access to dermatologists. DTTBs also have recog- nized the importance of having adequate knowledge on skin diseases and majority are very interested in learning more about these conditions. The top 3 barriers to the proper management of skin diseases were lack of training, lack of experience, and lack of medications. Most of the re- spondents have rated themselves as average to bad in their perceived competency in diagnosing and managing different common skin diseases.@*Conclusion@#The study showed that majority of the respondents had insufficient knowledge on the diagnosis and management of common der- matological diseases but had a strong interest to learn more. A significant number of the respondents do not always refer to dermatologists and have poor access to specialty care. Overall, our findings suggest that there are indeed barriers to delivery of skin-related health services that should be addressed.

Exosomes: Emerging Cell-Free Based Therapeutics in Dermatologic Diseases.

Exosomes are lipid bilayer vesicles released by multiple cell types. These bioactive vesicles are gradually becoming a leading star in intercellular communication involving in various pathological and physiological process. Exosomes convey specific and bioactive transporting cargos, including lipids, nucleic acids and proteins which can be reflective of their parent cells, rendering them attractive in cell-free therapeutics. Numerous findings have confirmed the crucial role of exosomes in restraining scars, burning, senescence and wound recovery. Moreover, the biology research of exosomes in cutting-edge studies are emerging, allowing for the development of particular guidelines and quality control methodology, which favor their possible application in the future. In this review, we discussed therapeutic potential of exosomes in different relevant mode of dermatologic diseases, as well as the various molecular mechanisms. Furthermore, given the advantages of favorable biocompatibility and transporting capacity, the bioengineering modification of exosomes is also involved.

Effects of Patients' Expectation in Dermatology: Evidence from Experimental and Clinical Placebo Studies and Implications for Dermatologic Practice and Research.

Patients' expectations towards the benefit of a treatment are key determinants of placebo responses and can affect the development and course of medical conditions and the efficacy and tolerability of active medical treatment. The mechanisms mediating these placebo and nocebo effects have been best described in the field of experimental pain and placebo analgesia. However, also in dermatology experimental and clinical studies demonstrate that various skin diseases such as inflammatory dermatoses and allergic reactions can be modulated by patients' expectations. Dermatologists should consider the important modulatory role of patients' expectations on the efficacy and tolerability of specific treatments and the key role of verbal information, patients' prior treatment experiences (associative learning), and the quality and quantity of doctor-patient communication in shaping treatment expectation. As a consequence, techniques aiming at maximizing patients' expectation effects should be implemented into daily clinical routine. By contrast, in clinical studies expectation effects should be maximally controlled and harmonized to improve the "assay sensitivity" to detect new compounds. Further translational studies, also in dermatoses that have not been investigated yet, are needed to better characterize the mechanisms underlying patients' expectation and to gain further insights into potential clinical implications of these effects in dermatologic conditions. Therefore, in this review, we provide a brief overview on the concept of expectation effects on treatment outcome in general, summarize what is already known about this topic for dermatologic diseases, and finally present the relevance of this topic in clinical dermatology.

Foray into Concepts of Design and Evaluation of Microemulsions as a Modern Approach for Topical Applications in Acne Pathology.

With a fascinating complexity, governed by multiple physiological processes, the skin is considered a mantle with protective functions which during lifetime are frequently impaired, triggering dermatologic disorders. As one of the most prevalent dermatologic conditions worldwide, characterized by a complex pathogenesis and a high recurrence, acne can affect the patient's quality of life. Smart topical vehicles represent a good option in the treatment of a versatile skin condition. By surpassing the stratum corneum known for diffusional resistance, a superior topical bioavailability can be obtained at the affected place. In this direction, the literature study presents microemulsions as a part of a condensed group of modern formulations. Microemulsions are appreciated for their superior profile in matters of drug delivery, especially for challenging substances with hydrophilic or lipophilic structures. Formulated as transparent and thermodynamically stable systems, using simplified methods of preparation, microemulsions have a simple and clear appearance. Their unique structures can be explained as a function of the formulation parameters which were found to be the mainstay of a targeted therapy.

Change of the diagnostic distribution in applicants to dermatology after COVID-19 pandemic: What it whispers to us?

We aim to evaluate the change in the diagnostic spectrum in dermatology outpatient applications compared to before COVID-19. All patients were enrolled from the Department of Dermatology between February 12 and May 8, 2020, the duration of 4 weeks before COVID-19 and 8 weeks after were analyzed in three parts consisting of 4 weeks. Data obtained from the database such as age, gender, diagnoses were anonymized. Repeated applications with the same diagnosis in 10 days after the first presentation were ignored. Compared to the pre-outbreak, there was a 3.5-fold decrease in dermatology applications in the first month after COVID-19 and an 8.8-fold in the second month. We found a significant increase in the frequency of diagnoses such as generalized pruritus, pityriasis rosea, alopecia areata, bacterial skin/mucosa diseases, and zona zoster after COVID-19. The frequency declined in diseases such as verruca vulgaris, hyperpigmentation, skin tag, melanocytic nevus, and seborrheic keratosis/solar lentigo. It has been found that the frequencies of most diseases, including acne (⁓25% of patients), did not change. We think that many factors, such as affecting the quality of life, risk perception, increased stress burden may cause a change in the diagnostic distribution of the dermatology applications.

Predictive Value of NUDT15 Variants on Neutropenia Among Han Chinese Patients with Dermatologic Diseases: A Single-Center Observational Study.

INTRODUCTION: Azathioprine is a synthetic purine analogue derived from 6-mercaptopurine which acts by disrupting nucleic acid synthesis and interfering with T cell activation. It is effective in dermatology diseases related to the immune system. However, its side effects, including severe neutropenia, kept patients from using it. Mutations in thiopurine methyltransferase (TPMT) and inosine triphosphate pyrophosphohydrolase (ITPA) genes account for the major genetic polymorphism markers for azathioprine adverse risk factors in Caucasians, but not in Asians. The predictive value of the nucleoside diphosphate-linked moiety X motif 15 gene (NUDT15) has been studied in various diseases among different populations. The aim of our study was to determine the contribution of NUDT15 mutations in azathioprine-induced neutropenia in Han Chinese patients with dermatologic diseases. METHODS: The study enrolled all consecutive patients, older than 13 years old, with dermatological diseases currently treated orally with azathioprine in our clinic. Samples were also collected from patients with documented leukopenia in our prior study that examined the association between TPMT, ITPA, and neutropenia after informed reconsent. Complete blood count, differential count, and hepatic and renal function were checked regularly. The DNA samples for NUDT15 genotype were obtained from the patients. RESULTS: In total, we enrolled 56 patients (39 male, 17 female). The NUDT15 genotypes are mostly C/C (N = 36, 64.29%). Heterozygous variant (C/T) accounts for 30.36% (N = 17) and homozygous variant (T/T) accounts for 5.36% (N = 3). Among these patients, 15 patients (26.79%) developed neutropenia, including all three patients carry homozygous variant (T/T). The age-, sex-, and dose-adjusted risk of heterozygous variant compared to wild type is 9.383 (95% CI 1.32-66.96). CONCLUSIONS: Pretreatment screening of NUDT15 might reduce the chance of azathioprine-induced neutropenia in Han Chinese patients with dermatologic diseases.

Therapeutic Apheresis in Hematologic, Autoimmune and Dermatologic Diseases With Immunologic Origin.

The process of curing a patient by removing his illness by extracting blood is a very old one. Many years ago, phlebotomy was practiced to cure illness. Now, this old process, placed on a rational basis with therapeutic apheresis (TA), is being followed in clinical practice. Therapeutic plasma exchange (TPE) with hollow fiber modules has been used in different severe diseases for more than 40 years. Based on many years of experience with the extracorporeal circulation in end-stage renal disease, the authors herein give an overview of TA in immunological diseases, especially in hematologic, autoimmune and dermatologic diseases. Updated information on immunology and molecular biology of different immunological diseases is discussed in relation to the rationale for apheresis therapy and its place in combination with other modern therapies. With the introduction of novel and effective biologic agents, TA is indicated only in severe cases, such as in rapid progression despite immunosuppressive therapy and/or biologic agents. In mild forms of autoimmune disease, treatment with immunosuppressive therapies and/or biologic agents seems to be sufficient. The prognosis of autoimmune diseases with varying organ manifestations has improved in recent years, due in part to very aggressive therapy schemes. For the immunological diseases that can be treated with TA, the guidelines of the German Working Group of Clinical Nephrology and of the Apheresis Applications Committee of the American Society for Apheresis are cited. TA has been shown to effectively remove the autoantibodies from blood and lead to rapid clinical improvement.

Hepatitis B and immunosuppressive therapies for chronic inflammatory diseases: When and how to apply prophylaxis, with a special focus on corticosteroid therapy.

Currently immunosuppressive and biological agents are used in a more extensive and earlier way in patients with inflammatory bowel disease, rheumatic or dermatologic diseases. Although these drugs have shown a significant clinical benefit, the safety of these treatments is a challenge. Hepatitis B virus (HBV) reactivations have been reported widely, even including liver failure and death, and it represents a deep concern in these patients. Current guidelines recommend to pre-emptive therapy in patients with immunosuppressants in general, but preventive measures focused in patients with corticosteroids and inflammatory diseases are scarce. Screening for HBV infection should be done at diagnosis. The patients who test positive for hepatitis B surface antigen, but do not meet criteria for antiviral treatment must receive prophylaxis before undergoing immunosuppression, including corticosteroids at higher doses than prednisone 20 mg/d during more than two weeks. Tenofovir and entecavir are preferred than lamivudine because of their better resistance profile in long-term immunosuppressant treatments. There is not a strong evidence, to make a general recommendation on the necessity of prophylaxis therapy in patients with inflammatory diseases that are taking low doses of corticosteroids in short term basis or low systemic bioavailability corticosteroids such as budesonide or beclomethasone dipropionate. In these cases regularly HBV DNA monitoring is recommended, starting early antiviral therapy if DNA levels begin to rise. In patients with occult or resolved hepatitis the risk of reactivation is much lower, and excepting for Rituximab treatment, the prophylaxis is not necessary.

Recognizing and managing comorbidities and complications in hidradenitis suppurativa.

The list of comorbidities associated with hidradenitis suppurativa (HS) is extensive, although these diseases do not necessarily share a common causality. Among the categories of comorbidities that are observed are obesity, other skin diseases, inflammatory conditions, and genetic disorders. Complications include scarring, restricted movement resulting from scarring and fibrosis in underlying tissue, conditions associated with obstructed lymph drainage, and psychosocial issues. Adverse effects on quality of life are common and may be severe, including unemployment, deterioration of family and other social relationships, and suicidal ideation. Clinical intervention for HS must include consideration and attention to these comorbidities and complications.

Ectoparasites in small exotic mammals.

Ectoparasites inhabiting the skin are responsible for significant problems in small mammals, owing to ingestion of blood, lymph, sebaceous secretions, and scavenging skin debris, as well as a hypersensitivity reaction to parasite antigen resulting in severe pruritus and subsequent self-trauma-induced lesions. In general practice, the most common diagnosis in exotic pets is an unspecified mite infestation, but other ectoparasites such as lice, fleas, insects, or even helminths may cause dermatologic diseases. If treatment with topical insecticides is planned, the small mammal should be isolated for a few hours to enable drying and spreading of the product.

Stevens-Johnson syndrome and toxic epidermal necrolysis at the University Hospital of the West Indies, Jamaica / El síndrome de Stevens-Johnson y la necrólisis epidérmica tóxica en el Hospital Universitario de West Indies, Jamaica

OBJECTIVE: Stevens-Johnson syndrome and toxic epidermal necrolysis are uncommon acute dermatologic disorders. The purpose of this study was to examine the frequency, aetiology and outcome of cases of Stevens-Johnson syndrome and toxic epidermal necrolysis admitted to the dermatology ward at the University Hospital of the West Indies. METHODS: This was a retrospective study looking at all patients who were admitted with a diagnosis of Stevens-Johnson syndrome, Stevens-Johnson syndrome/toxic epidermal necrolysis overlap syndrome and toxic epidermal necrolysis over a nine-year period. RESULTS: The results showed almost equal numbers of males and females. The drugs most commonly implicated were phenytoin and cotrimoxazole. The most common complications were hepatic impairment and ophthalmic complications. CONCLUSION: Stevens-Johnson syndrome and toxic epidermal necrolysis contribute significantly to morbidity and mortality of patients on the dermatology ward although mortality was low compared to other studies.

OBJETIVO: El síndrome de Stevens-Johnson (SSJ) y la necrólisis epidérmica tóxica (NET) son trastornos dermatológicos agudos poco frecuentes. El propósito de este estudio fue examinar la frecuencia, la etiología y el resultado de casos de síndrome Stevens-Johnson y necrólisis epidérmica tóxica ingresados en la sala de dermatología del Hospital Universitario de West Indies. MÉTODOS: Se trata de un estudio retrospectivo con todos los pacientes que fueron ingresados con diagnóstico de síndrome de Stevens-Johnson, síndrome de solapamiento entre el síndrome de Stevens-Johnson y NET, y necrólisis epidérmica tóxica, por un período de nueve años. RESULTADOS: Los resultados mostraron casi igual número de varones y hembras. Los fármacos más comúnmente implicados fueron la fenitoína y el cotrimoxazol. Las complicaciones más frecuentes fueron deterioro hepático y complicaciones oftálmicas. CONCLUSIÓN: El síndrome Stevens-Johnson y la necrólisis epidérmica tóxica contribuyen significativamente a la morbilidad y mortalidad de los pacientes en la Sala de Dermatología, aunque la mortalidad fue baja en comparación con otros estudios.

Distribution of histological diagnoses of black and white skin in Campinas, diseases Brazil, from 1993 to 2009 / Distribuição dos diagnósticos histológicos das afecções da pele negra e branca, em Campinas, Brasil, entre 1993 e 2009

INTRODUCTION: Little is known about ethnic differences in the frequency of skin diseases, and even less in terms of Brazilian population, which is characterized by miscegenation. OBJECTIVE: To evaluate the distribution of skin disorders in black and Caucasian patients through pathological specimens. METHODS: 826 biopsies from black-skinned individuals and 1,652 from white-skinned patients were retrieved and studied from the files of the Pathology Department, UNICAMP Hospital within the period of 1993-2009. The clinical data were obtained from medical records and the results were tested by statistical methods. RESULTS: Non-melanoma cancer was the most frequent diagnosis in Caucasians (45%), differing from the frequency among black patients (8%), both arising in sun-exposed skin. Regarding topography and age, in white-skinned patients aged over 50 years, biopsies of "head and neck" prevailed. As to black patients, the disease predominated among female individuals aged from 15 to 50 years and in the genital area. In the comparative analysis of vulvar diseases, we observed differences in diagnoses of sexually transmitted diseases more common among black women. Excluding cancers and genital lesions, black patients had a higher percentage of infectious diseases. Among the non-infectious diseases, cutaneous lupus was the most frequent diagnosis in both groups. Lichen planus and drug reactions were more frequent in black patients. CONCLUSION: Apart from intrinsic differences among skin types, social factors may interfere in the distribution of diseases. Not only may these results be useful to public health programs, but they may also aid the approach to dermatological diseases in black skin patients.

INTRODUÇÃO: Pouco se conhece sobre as diferenças étnicas na frequência das doenças da pele e, menos ainda, na população brasileira, caracterizada pela miscigenação. OBJETIVO: Avaliar a distribuição das afecções da pele de indivíduos negros, comparativamente com a dos brancos, em material anatomopatológico. MÉTODOS: Foram estudadas 826 biópsias de indivíduos de pele negra e 1.652 dos de pele branca, obtidas do Departamento de Anatomia Patológica do Hospital das Clínicas da Universidade Estadual de Campinas (HC-UNICAMP), entre 1993 e 2009. Os achados clínicos foram obtidos dos prontuários e os resultados testados por métodos estatísticos. RESULTADOS: O câncer não melanoma foi o diagnóstico mais frequente nos brancos (45%), diferindo, significantemente, da frequência nos negros (8%), assestando-se, em ambos, na pele exposta ao sol. Quanto à topografia e à idade, nos brancos predominavam biópsias da "cabeça e pescoço", na faixa acima dos 50 anos. Nos negros, as doenças predominavam entre 15 e 50 anos, no sexo feminino, na topografia dos genitais. À análise comparativa das doenças vulvares, observou-se diferença nos diagnósticos de doenças sexualmente transmissíveis mais frequentes nas mulheres negras. Excluindo-se os cânceres e a topografia genital, os negros apresentaram porcentagem maior de doenças infecciosas. Entre as doenças não infecciosas, o lúpus cutâneo foi a mais frequente nos dois grupos; o líquen plano e a farmacodermia foram mais frequentes nos negros. CONCLUSÃO: Além das diferenças intrínsecas de tipos de pele, fatores sociais podem atuar na distribuição das doenças. Esses resultados podem ser úteis, tanto para os programas de saúde pública quanto para a abordagem das doenças dermatológicas nos pacientes de pele negra.