Somatic and psychiatric comorbidities of hidradenitis suppurativa in children and adolescents

Pediatric hidradenitis suppurativa publication trends: 2012 to 2022

There is a paucity of bibliometric data on pediatric-focused hidradenitis suppurativa (HS) publications. To better characterize research trends in pediatric HS and gaps in literature, we systematically searched PubMed between 2012 and 2022 for publications on pediatric HS and collected data on study design, topic, country, and level of evidence. Of 109 articles that met inclusion criteria, less than half (44/109, 40.4%) were high level of evidence studies; the most common study types were case reports/series (41/109, 37.6%) and cross-sectional studies (25/109, 22.9%), and the most common study topics were HS treatments (44/109, 40.4%), comorbidities (20/109, 18.3%), and clinical presentation (14/109, 12.8%). Although there has been expansion of the pediatric HS literature in recent years, our study highlights the need for larger prospective studies and trials to improve our ability to optimally manage pediatric HS patients and identify predictors of disease progression and treatment response.

Prevalence and Clinical Impact of Immune-Mediated Inflammatory Diseases in Patients with Inflammatory Bowel Disease: Results from a Large Retrospective Observational Study

(1) Background: Inflammatory bowel diseases (IBDs) are chronic inflammatory disorders involving innate and adaptive immune responses. Despite primarily affecting the gut, recent insights highlight systemic implications, expanding our understanding beyond intestinal boundaries. (2) Methods: This retrospective multicentric study explored the association of IBD and immune-mediated inflammatory diseases (IMIDs) and the impact of concurrent IMIDs on the course of IBD. Clinical data were collected from consecutive medical records of patients with IBD. For assessing the impact of concurrent IMIDs, a control group of IBD patients without associated IMIDs was considered. (3) Results: Of 6589 IBD patients, 6.8% exhibited concomitant IMIDs. Notably, 79.8% of these patients had an aggressive disease course. Psoriasis, atopic dermatitis, and type 1 diabetes mellitus prevalence were lower in the IBD population than in the general population. Conversely, multiple sclerosis, primary sclerosing cholangitis, and pyoderma gangrenosum were more prevalent in IBD patients. Among the patients with a concomitant IMID, 79.8% had an aggressive disease course vs. 8.1% in the control group (p < 0.001). (4) Conclusions: This study underscores the frequency of IMIDs in IBD patients and their association with a more aggressive disease course. The recognition of concurrent IMIDs is crucial for comprehensive patient management, influencing therapeutic decisions and potentially improving outcomes.

Hidradenitis Suppurativa in Children and Adolescents: An Update on Pharmacologic Treatment Options

Hidradenitis suppurativa (HS) is a chronic, recurrent, inflammatory skin condition that manifests as painful, deep-seated, inflamed nodules and abscesses in the axillary, groin, perianal, perineal, and inframammary regions. The associated pain, malodour, and disfigurement contribute to its profound negative impact on psychosocial spheres and overall quality of life in affected individuals. Although the symptoms of HS classically begin in the second or third decade of life, HS affects children and adolescents as well. Despite this, there are limited pediatric data on treatment, which are largely based on expert opinion, extrapolation of efficacy data in adults with HS, and safety information from medication use in other pediatric diseases. On this basis, there exist several pharmacological modalities in the treatment of children and adolescents with HS including topical therapies, systemic therapies, and biologics. The goals of this review article are to: (1) review the efficacy of different pharmacological treatment modalities in children and adolescents with HS, and (2) review the safety and monitoring considerations of the different treatment options in children and adolescents with HS.

Characteristics and treatment pathways in pediatric and adult hidradenitis suppurativa: An examination using real world data

Background

Hidradenitis suppurativa (HS) is a chronic, debilitating, inflammatory disease. Contemporaneous real-world data can be used to elucidate the clinical treatment of pediatric patients and how treatment strategies compare with adult hidradenitis suppurativa patients.

Objective

The objective of this study is to evaluate clinical and treatment characteristics of pediatric and adult HS patients.

Methods

HS adult and pediatric patients were identified in 3 the United States administrative claims databases during the study period between 2016 to 2021. Patients were required to have 2 diagnostic codes for HS and have at least 365 days of prior observation time to the first HS diagnosis.

Results

Pediatric and adult HS treatments were similar. The proportions of subjects treated with topical and oral antibiotic or oral antibiotic alone or topical medication alone or surgery alone covered 90% of the treated pediatric subjects and 91% of treated adult subjects. The remaining proportion of subjects received other treatment combinations.

Limitations

The databases represent subjects with commercial or government insurance coverage and thus do not necessarily represent the broader US population. The databases do not capture information about medications obtained without insurance.

Conclusions

Although subtle differences exist, this study confirms that topical and systemic therapeutic treatment of HS in adults and adolescents is very similar.

Prevalence of Crohn Disease Among Pediatric Patients With Hidradenitis Suppurativa

This cross-sectional study compares the prevalence of Crohn disease among US pediatric patients with and without hidradenitis suppurativa.

Pediatric hidradenitis suppurativa: Describing care patterns in the emergency department

BACKGROUND/OBJECTIVES

The emergency department (ED) is a common point of care for many pediatric hidradenitis suppurativa (HS) patients; however, ED care may not align with recommended treatment standards. The objective of this study is to describe the care pediatric HS patients receive in the ED compared to both HS management guidelines and the management of pediatric skin and soft tissue abscess (SSTA) patients.

METHODS

We performed a retrospective chart review of pediatric HS and SSTA patients who presented to a single pediatric ED. Demographic and ED encounter data including medications, procedures, recommendations, consults, and referrals were collected.

RESULTS

58 HS and 175 SSTA charts were reviewed. 69.5% of patients were female and 93.6% were African American/Black. 29.3% of HS and 61.7% of SSTA encounters involved incision and drainage (I&D); 62.1% of HS and 70.1% of SSTA encounters involved the prescription or administration of oral clindamycin; 3.4% of HS and 0.6% of SSTA encounters involved dermatology consultation in the ED; and 22.4% of HS and 5.1% of SSTA encounters involved outpatient referrals to dermatology.

CONCLUSIONS

Our data reveal a pediatric HS and SSTA population that is predominantly female and African American/Black. Significant differences were found in the average ages and number of lesions between HS and SSTA patients. I&D and oral clindamycin were the most common treatments across groups; however, I&D was performed significantly more frequently among SSTA encounters than HS encounters. Our results suggest that subtle knowledge gaps may exist in ED provider management of pediatric HS.

A bibliometric analysis of hidradenitis suppurativa literature over the past 50 years

BACKGROUND

We aimed to describe the existing literature on hidradenitis suppurative (HS) in the last 50 years and the key processes made over time.

METHODS

On July 27, 2022, we searched for HS studies published in the last 50 years (from 1972 to 2022) using Web of Science. The search was made using the keywords "Hidradenitis Suppurativa" and "Acne Inversa." The data are subdivided according to publications and citations rate, country, publication year, journal and impact factor, keywords analysis of top 100 cited papers study design, and pediatric versus adults.

RESULTS

In total, 5072 documents were retrieved. The annual number of HS publications has increased over the years. The manuscript with the highest citation number was by Zouboulis et al., a total of 552 citations from 2015. The manuscript with the highest citation rate per year was by Mantovani et al., with a citation rate of 70.7/year. According to keywords analysis among the top 100 cited papers, most of the articles focused on management, followed by the pathogenesis of HS. Only 805 out of 5072 (15.8%) HS articles described the disease among children.

CONCLUSIONS

In the current analysis, we shed light on HS's transformations over the last 50 years. In addition, we described the 100 top cited papers and other essential characteristics not examined before, such as HS research in children, gender bias research, specific pharmacological therapy with keyword analysis, comorbidities, preventative care, and publications per country after controlling for population.

Causal association between inflammatory bowel disease and hidradenitis suppurativa: A two-sample bidirectional Mendelian randomization study

Background

Epidemiological studies have revealed a link between inflammatory bowel disease (IBD) and hidradenitis suppurativa (HS). To determine whether IBD and HS are causally related, we used the Mendelian randomization (MR) approach.

Methods

A two-sample MR was performed using an analysis of 12,882 patients and 21,770 controls with IBD and its main subtypes, ulcerative colitis (UC) and Crohn's disease (CD). A total of 409 cases and 211,139 controls without hidradenitis suppurativa (HS) were included in the data for this condition from various GWAS investigations. Odds ratios (ORs) with 95% confidence intervals (CIs) are used to estimate causal effects.

Results

The study assessed the causal relationship between HS and IBD in both directions. The risk of HS was increased by IBD (IVW OR = 1.34, 95% CI = 1.20-1.49, p = 2.15E-07) and, in addition, HS was affected by UC (IVW OR = 1.27, 95% CI = 1.13-1.43, p = 8.97E-04) and CD (IVW OR = 1.18, 95% CI = 1.08-1.29, p = 4.15E-04). However, there was no evidence of a causal relationship between HS and IBD or its subtypes (IBD IVW OR = 1.00, 95% CI = 0.96-1.05, p = 0.85; UC IVW OR = 0.99, 95% CI = 0.95-1.03, p = 0.65; CD IVW OR = 1.03, 95% CI = 0.98- 1.07, p = 0.28).

Conclusion

This study demonstrates that IBD and its subtypes have a causal effect on HS, whereas HS does not affect IBD. Gut-skin axis interactions may help to understand this association. Nevertheless, further studies are needed to clarify the pathophysiology of the causal relationship between IBD and HS.

Pain and Late-Onset of Hidradenitis Suppurativa Can Have a Negative Influence on Occupational Status and Educational Level. A Cross-Sectional Study

BACKGROUND AND OBJECTIVES

Hidradenitis suppurativa is a chronic and painful condition with negative impact on daily activity. Little information on the impact of disease-specific factors on educational level and occupational status in hidradenitis suppurativa patients has been reported. We sought to identify how disease-specific factors could influence occupational status and educational level in patients with hidradenitis suppurativa.

METHODS

Cross-sectional study of patients with hidradenitis suppurativa seen between September 2017 and September 2018. Disease-specific variables were analyzed to find associations in patients with different educational levels and occupational status.

RESULTS

Ninety-eight patients were included. Patients with non-university studies had more frequently≥3 affected areas (22.5% [16/73] vs 4.8% [1/22], p=0.049), a higher number of painful days (8.5 [SD 8.8] vs 4.6 [SD 4.8], p=0.048) and a higher score on the VAS scale (6.7 [SD 2.8] vs 5.0 [3.3], p=0.031). Patients from the inactive group had a significantly increased number of painful days (11.2 [SD 10.4] vs 5.7 [SD 6.2], p=0.004). This group had a greater number of patients with a history of depression (61.3% [19/31] vs 27.4% [17/62], p=0.002) and a higher mean BMI (32.3 [9.1] vs 28.4 [6.4], p=0.016). Late disease onset was significantly associated with being "inactive" (26.7% [8/31] vs 6.5% [4/62], p=0.026). No significant differences between severity scales of hidradenitis suppurativa and educational level or occupational status were found.

LIMITATIONS

cross-sectional and single center study.

CONCLUSIONS

Pain, ≥3 affected areas, history of depression, higher mean BMI, and late onset of hidradenitis suppurativa, are associated with low education level and inactive occupational status.

Incidence, Risk Factors, and Prognosis of Hidradenitis Suppurativa Across the Globe: Insights from the Literature

Hidradenitis suppurativa, a chronic inflammatory disease of the skin, affects a patient's quality of life to a greater extent. While the disease burden, including its incidence and prevalence, has been extensively studied in the western population, there is a paucity of data from developing countries on the epidemiology of Hidradenitis suppurativa. Therefore, a general literature review was conducted to shed light on the epidemiology of Hidradenitis suppurativa across the globe. We reviewed the most recently available information on epidemiology, including incidence, prevalence, risk factors, prognosis and quality of life, complications, and associated comorbid among patients with Hidradenitis suppurativa. The estimated global prevalence of Hidradenitis suppurativa is found to be 0.00033-4.1%, with a relatively higher prevalence of 0.7-1.2% in European and US populations. Both genetic and environmental factors are associated with Hidradenitis suppurativa. Patients with Hidradenitis suppurativa have associated comorbid such as cardiovascular disease, type II diabetes mellitus, mental health issues, and sleep and sexual dysfunctions. These patients spend poor quality of life and tend to be less productive. Future studies are needed to assess the burden of Hidradenitis suppurativa in developing countries. Since the disease tends to be underdiagnosed, future studies should rely on clinical diagnosis rather than self-reporting to avoid the potential of recall bias. Attention needs to be diverted to developing countries with less amount of data on Hidradenitis suppurativa.

Pain and late-onset of hidradenitis suppurativa can have a negative influence on occupational status and educational level. A cross-sectional study

BACKGROUND AND OBJECTIVES

Hidradenitis suppurativa (HS) is a chronic and painful condition with negative impact on daily activity. Little information on the impact of disease-specific factors on educational level and occupational status in hidradenitis suppurativa patients has been reported. We sought to identify how disease-specific factors could influence occupational status and educational level in patients with HS.

METHODS

Cross-sectional study of patients with HS seen between September 2017 and September 2018. Disease-specific variables were analyzed to find associations in patients with different educational levels and occupational status.

RESULTS

Ninety-eight patients were included. Patients with non-university studies had more frequently ≥ 3 affected areas (22.5% [16/73] vs. 4.8% [1/22], p = 0.049), a higher number of painful days (8.5 [SD 8.8] vs. 4.6 [SD 4.8], p = 0.048) and a higher score on the VAS scale (6.7 [SD 2.8] vs. 5.0 [3.3], p = 0.031). Patients from the inactive group had a significantly increased number of painful days (11.2 [SD 10.4] vs. 5.7 [SD 6.2], p = 0.004). This group had a greater number of patients with a history of depression (61.3% [19/31] vs. 27.4% [17/62], p = 0.002) and a higher mean BMI (32.3 [9.1] vs. 28.4 [6.4], p = 0.016). Late disease onset was significantly associated with being «inactive» (26.7% [8/31] vs. 6.5% [4/62], p = 0.026). No significant differences between severity scales of HS and educational level or occupational status were found.

LIMITATIONS

cross-sectional and single center study.

CONCLUSIONS

Pain, ≥ 3 affected areas, history of depression, higher mean BMI, and late onset of HS, are associated with low education level and inactive occupational status.

Phenotype Algorithms to Identify Hidradenitis Suppurativa Using Real-World Data: Development and Validation Study

BACKGROUND

Hidradenitis suppurativa (HS) is a potentially debilitating, chronic, recurring inflammatory disease. Observational databases provide opportunities to study the epidemiology of HS.

OBJECTIVE

This study's objective was to develop phenotype algorithms for HS suitable for epidemiological studies based on a network of observational databases.

METHODS

A data-driven approach was used to develop 4 HS algorithms. A literature search identified prior HS algorithms. Standardized databases from the Observational Medical Outcomes Partnership (n=9) were used to develop 2 incident and 2 prevalent HS phenotype algorithms. Two open-source diagnostic tools, CohortDiagnostics and PheValuator, were used to evaluate and generate phenotype performance metric estimates, including sensitivity, specificity, positive predictive value (PPV), and negative predictive value.

RESULTS

We developed 2 prevalent and 2 incident HS algorithms. Validation showed that PPV estimates were highest (mean 86%) for the prevalent HS algorithm requiring at least two HS diagnosis codes. Sensitivity estimates were highest (mean 58%) for the prevalent HS algorithm requiring at least one HS code.

CONCLUSIONS

This study illustrates the evaluation process and provides performance metrics for 2 incident and 2 prevalent HS algorithms across 9 observational databases. The use of a rigorous data-driven approach applied to a large number of databases provides confidence that the HS algorithms can correctly identify HS subjects.

Common Dermatologic Disorders in Down Syndrome: Systematic Review

Background

Down syndrome (DS) has been associated with cardiovascular, gastrointestinal, and immune-related abnormalities. Several dermatologic conditions, including hidradenitis suppurativa, have also been found to be associated with DS.

Objective

The objective of this study was to characterize the prevalence, presentation, and unique features of dermatologic disorders associated with DS.

Methods

Electronic searches of EMBASE (via Ovid), MEDLINE (via Ovid), and Web of Science databases were conducted on December 14, 2020. Observational studies including case reports of patients with DS presenting with concomitant primary dermatologic disorder were included.

Results

This systematic review captured 40 observational studies and 99 case reports, including 10 observational studies that examined the prevalence of common skin disorders in patients with DS. The most common dermatologic conditions reported includes atopic dermatitis (8 studies, n=180; 19.7% mean prevalence), hidradenitis suppurativa (15, n=478; 3.2%), ichthyosis (4, n=16; 4.7%), lichen nitidus (6, n=6; 1.1%), psoriasis (21, n=65; 4.8%), alopecia areata (27, n=253; 7.4%), vitiligo (8, n=40; 4.4%), onychomycosis (3, n=198; 24.7%), calcinosis cutis (14, n=15), connective tissue nevi (6, n=6), dermatofibroma (3, n=3), melanoma (3, n=3), syringomas (14, n=182; 21.2%), and elastosis perforans serpiginosa (19, n=24; 0.5%).

Conclusions

Our results indicate an increased prevalence of common cutaneous disorders in patients with DS, particularly infectious, inflammatory, autoimmune, and connective tissue conditions. Current guidelines for the screening, general management, and use of systemic immunomodulatory agents in this patient population are lacking. Patients with DS would benefit from screening for dermatologic disorders not otherwise regularly performed for earlier diagnosis and treatment.

Trial Registration

PROSPERO International Prospective Register of Systematic Reviews CRD42021226295; https://www.crd.york.ac.uk/PROSPERO/display_record.php?RecordID=226295

Pediatric Hidradenitis Suppurativa: A Cross-Sectional Study on Clinical Features and Treatment Approaches

BACKGROUND

Hidradenitis suppurativa is uncommon in patients of pediatric age, and differentiation with adult-onset disease is controversial. Treatment of pediatric hidradenitis suppurativa is scarcely standardized, and specific guidelines are lacking.

OBJECTIVE

We report the clinical features, relevant risk-factors, comorbidity profile, and treatment patterns of a hospital-based cohort of pediatric hidradenitis suppurativa.

METHODS

In a cross-sectional study data on patients' demographics, disease-specific characteristics, early/pre-pubertal onset of disease, comorbidities, and treatment management were retrieved. Reference population data and clinical data from the national hidradenitis suppurativa disease registry were used for comparison.

RESULTS

From a database of 870 patients with hidradenitis, 71 (15 males and 56 females) patients aged <18 years (mean age: 15.3 years; range 8-17 years), with mild (Hurley I, 45.1%) and moderate-severe disease (Hurley II-III, 54.9%), were retrieved. Smoking (23.9%) and overweight/obese frequencies (59.2%) were higher than reference population standards. Patient's older age at baseline (OR 1.43, 95% CI: 1.01 to 2.02) and higher BMI (OR 1.26, 95% CI: 1.07-1.48) were the only factors associated with moderate-severe disease. Family history and early/pre-pubertal onset of disease were not associated with severity or extent of disease. Sebaceous-follicular comorbid conditions were associated with cigarette smoking (P = .002). Among 81 treatment courses, clindamycin-based and zinc-sulphate-based combination regimens were most frequently used (59.3%). Female preponderance, family history of disease and extensive involvement were significantly different from the general hidradenitis suppurativa population.

CONCLUSIONS

Pediatric hidradenitis suppurativa presents a clinical spectrum comparable to adult-onset disease. Increased preventive measures should target obesity and smoking in this population.

Hidradenitis Suppurativa in the Pediatric Population: An International, Multicenter, Retrospective, Cross-sectional Study of 481 Pediatric Patients

Importance

Hidradenitis suppurativa (HS) in pediatric patients has been understudied. Increased awareness and recognition of HS prevalence in children demand efforts to better understand this condition.

Objective

To describe the demographics, clinical features, treatment, associated comorbidities, and outcomes in a large cohort of pediatric patients with HS.

Design, Setting, and Participants

International, multicenter, retrospective medical record review of pediatric patients (aged 1-18 years) with a clinical diagnosis of HS carried out in 10 dermatology clinics across the US, Canada, Israel, Australia, and Italy from January 1996 to January 2017.

Main Outcomes and Measures

Patient demographics, clinical features, severity, associated comorbidities, and treatments in pediatric patients with HS.

Results

This cross-sectional study included 481 patients diagnosed with HS. Overall, 386 (80%) were girls. The mean (SD) age of disease onset was 12.5 (2.9) years, and the mean (SD) age at diagnosis was 14.4 (3.5) years. Family history of HS was present in 111 of 271 (41%) patients. First signs/symptoms reported at disease onset were cyst/abscess in 229 of 481 (48%), pain/tenderness in 118 of 481 (25%), and papules/pustules in 117 of 481 (24%). At initial dermatologic assessment, 233 of 481 (48%) patients already had evidence of skin scarring. Disease severity (Hurley staging) was documented in 288 of 481 (60%) patients (47% stage 1, 45% stage 2 and 8% stage 3). Comorbid conditions were reported in 406 of 481 (85%) patients, the most common being obesity (263/406 [65%]) and acne vulgaris (118/406 [29%]). Complications occurred in 378 of 481 (79%) patients, the most common of which were scars or contractures (301/378 [80%]).

Conclusions and Relevance

The findings of this study indicate that there is a gap in recognizing and diagnosing pediatric HS. Pediatric patients with HS are likely to present with other comorbidities. Prospective observational and interventional studies are needed to better understand clinical course and optimal treatments for pediatric HS.

Physical and psychosocial comorbidities of pediatric hidradenitis suppurativa: A retrospective analysis

BACKGROUND/OBJECTIVES

Hidradenitis suppurativa (HS) is understudied in the pediatric population. Adult HS patients are known to have a high comorbidity burden. We aimed to describe physical and psychosocial comorbidities in a cohort of pediatric HS patients.

METHODS

A retrospective chart review of pediatric HS patients at a single academic institution was conducted. Data on patient demographics, disease characteristics, and physical and psychosocial comorbidities in pediatric patients with HS were collected and analyzed.

RESULTS

Seventy-three pediatric patients were included in this study, 81% female. Mean (SD) age of HS disease onset was 12.6 (2.9) years. Comorbid conditions were reported in 68 of 73 (93%) patients. Significantly increased rates of several comorbidities were seen in our cohort as compared to the general US pediatric population. Metabolic and endocrine abnormalities were prevalent, with 52% (22/42) patients with obesity and 10% (6/59) with polycystic ovary syndrome. The most common cutaneous comorbidity was acne vulgaris, seen in 37% (27/73) of patients. Over one quarter (21/73, 29%) of patients had either an anxiety or depression disorder. Almost one-fifth (14/73, 19%) of our cohort had a diagnosis of asthma and other reactive airway diseases. Only one-third (24/73, 33%) of patients had documentation regarding impact of HS on their daily life. Overall, comorbidities largely did not significantly differ based on race, gender, or disease severity.

CONCLUSIONS

Pediatric patients with HS face a high-comorbidity burden, especially with psychiatric conditions. Early identification, including routine mental health screening, and management of comorbidities is warranted in the pediatric HS population.

Multidisciplinary Management of Adolescents with Hidradenitis Suppurativa - Series of Cases and Literature Review

Hidradenitis suppurativa (HS) is a recurrent chronic inflammatory condition of the skin with a debilitating potential, especially in adolescents who may experience psychosocial disorders and impaired quality of life. Recognition of typical, recurrent lesions, history of the disease and family investigation establishes the diagnosis. The rarity of the disease in males and the appearance of this condition in children, which is also rare, in two of our adolescent patients, respectively, are the reasons for publishing this article. We reviewed the literature and found that variation exists across international treatment for this HS, and much collaboration is needed to put forth unified and updated recommendations. It is of major importance that the early recognition of the condition and the establishment of treatment in the multidisciplinary team. Psychotherapy, health education, the adoption of a healthy lifestyle, the application of local prevention measures, and long-term medical treatment are components of a correct management. Extensive surgical treatment should be restricted only to severe cases because it may lead to complications, extend the hospitalization period and increase psychological problems in adolescents. The treatment will be personalized, performed according to the stage of evolution, and the approach will be a multidisciplinary one.

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Incidence, prevalence, and predictors of inflammatory arthritis in patients with hidradenitis suppurativa: a systematic review and meta-analysis

An increasing amount of evidence has emerged suggesting that hidradenitis suppurativa (HS) is associated with inflammatory arthritis. This study reviewed the incidence, prevalence, and predictors of inflammatory arthritis in patients with HS. A comprehensive literature search was conducted in CINAHL, Embase, and Medline from inception to February 14, 2020. Articles were included in the review if they provided data on disease epidemiology or predictors of adult or pediatric HS patients with comorbid inflammatory arthritis. There are no validated diagnostic criteria for HS, thus we considered patients as having HS if they had at least one diagnostic code in a hospital or claims database or a diagnosis of HS/inflammatory arthritis in a medical record. The same criteria were used to confirm presence of inflammatory arthritis. We identified an increased incidence of rheumatoid arthritis (RA), ankylosing spondylitis (AS), and psoriatic arthritis (PsA) in HS patients when compared with estimates in the general population. We identified a relatively high prevalence of RA, spondyloarthritis (SpA), and PsA in HS patients when compared with estimates in the general population. There was evidence to suggest that patients who are younger than 30, male, have severe HS, or are taking infliximab or adalimumab (which may also be confounded by HS disease severity) may be at greater risk for specific subtypes of inflammatory arthritis. However, further data are needed to confirm these associations. The increased incidence and prevalence of inflammatory arthritis within HS patients underscore the need for increased awareness and interdisciplinary partnership within rheumatology and dermatology.

Differences Between Children and Adults With Hidradenitis Suppurativa

Importance

Up to 50% of patients may have hidradenitis suppurativa (HS) onset between age 10 and 21 years. To our knowledge, little is known about how adolescents with HS utilize health care during their journey to receiving a diagnosis.

Objective

To assess the clinical characteristics and health care utilization patterns of pediatric vs adult patients with HS.

Design, Setting, and Participants

This retrospective cohort study included adult and pediatric patients with HS claims from the MarketScan medical claims database during the study period, January 1, 2012, to December 31, 2016. The data were analyzed between March 1 and March 31, 2021.

Exposures

Clinical characteristics and health care utilization patterns of pediatric vs adult patients with HS.

Main Outcomes and Measures

Health care utilization patterns were examined and included concurrent diagnoses, outpatient care by discipline, and emergency/urgent care and inpatient claims.

Results

This study included 8727 members, comprising 1094 pediatric (155 male [14.2%] and 939 female patients [85.8%]; mean [SD] age, 14.3 [2.47] years) and 7633 adult patients (1748 men [22.9%] and 5885 women [77.1%]; mean [SD] age, 37.2 [12.99] years). Pediatric patients were likely to see pediatricians, dermatologists, emergency department (ED) staff, and family physicians before diagnosis and commonly received diagnoses of folliculitis and comedones. Pediatric patients with HS had high rates of comorbid skin and general medical conditions, including acne vulgaris (558 [51.0%]), acne conglobata (503 [45.9%]), obesity (369 [33.7%]), and anxiety disorders (367 [33.6%]). A higher percentage of pediatric than adult patients had HS-specific claims for services rendered by emergency and urgent care physicians (35.6% vs 28.2%; P < .001; and 18.1% vs 13.4%; P < .001; respectively). However, adult patients were more likely to have inpatient stays (2.38% vs 4.22%; P = .002). Pediatric patients had 2.24 ED claims per person, while adults had 3.5 claims per person. The mean cost per ED claim was similar between groups ($413.27 vs $682.54; P = .18). The largest component of the total 5-year disease-specific cost was the cost of inpatient visits for pediatric and adult patients with HS.

Conclusions and Relevance

This cohort study suggests that pediatric patients utilize high-cost ED care when HS can often be treated as an outpatient. These data suggest that there are opportunities to improve recognition of HS in pediatric patients by nondermatologists and dermatologists.

Prevalence of depression among children, adolescents, and adults with hidradenitis suppurativa

BACKGROUND

Information on prevalence of depression among children, adolescents, and adults with hidradenitis suppurativa (HS) is limited.

OBJECTIVE

To compare prevalence of depression in HS patients with that of controls.

METHODS

Cross-sectional analysis of 38,140 adult and 1162 pediatric HS patients and controls identified using data from electronic health records. Primary outcome was prevalent depression.

RESULTS

Prevalence of depression among adults with HS was 30.0% (95% Confidence interval [CI], 29.6-30.5), compared with 16.9% (95% CI, 16.7-17.1) among controls. Among children and adolescents with HS, prevalence of depression was 11.7% (95% CI, 10.0-13.7), compared with 4.1% (95% CI, 3.6-4.7) among controls. In adjusted analyses, adults and children/adolescents with HS had 1.26 (95% CI, 1.25-1.28; P < .001) and 1.42 (95% CI, 0.999-2.01; P = .051) times the odds of having depression relative to controls, respectively.

LIMITATIONS

We could not evaluate the influence of disease severity on the outcome.

CONCLUSION

Depression is prevalent among children, adolescents, and adults with HS. Periodic screening for depression may be warranted.

Caring for Pediatric Hidradenitis Suppurativa Patients in the Emergency Department

ABSTRACT

Hidradenitis suppurativa (HS) is a chronic and recurrent inflammatory skin condition resulting in the formation of nodules, sinus tracts, and abscesses in intertriginous areas. We provide recommendations for the management of children presenting to the emergency department with acute HS flares, based on a review of literature and insights from our own clinical experience. The purpose of the recommendations is to educate clinicians on specific considerations that should be made when caring for children with HS.

Association between Hidradenitis Suppurativa and Inflammatory Arthritis: A Systematic Review and Meta-Analysis

BACKGROUND

Several studies report a high prevalence of inflammatory arthritis among hidradenitis suppurativa (HS) patients.

OBJECTIVES

To study the association between HS and inflammatory arthritis.

METHODS

The systematic review and meta-analysis were performed according to the PRISMA guidelines to identify the association between HS and inflammatory arthritis, spondyloarthritis, ankylosing spondylitis (AS), and rheumatoid arthritis (RA).

RESULTS

Seven studies were entered in the analysis, with 200,361 HS patients and 385,599 controls. Pooled analysis illustrated a significantly increased risk of inflammatory arthritis in HS patients compared to controls (odds ratio [OR] 3.44; 95% confidence interval [CI] 1.92-6.17). There was also a statistically significant association between HS and spondyloarthritis (OR 2.10; 95% CI 1.40-3.15), and between HS and AS (OR 1.89; 95% CI 1.14-3.12). Moreover, pooled analysis showed a statistically significant association between HS and RA (OR 1.96; 95% CI 1.28-2.98).

CONCLUSIONS

Our findings show that HS patients have a 3-fold increased risk of developing inflammatory arthritis. HS patients are specifically at a higher risk for spondyloarthritis, its subtype AS, and RA.

[Psychiatric comorbidities in hidradenitis suppurativa/acne inversa]

BACKGROUND

The findings of most studies suggest that depression and anxiety disorders are the most common psychiatric comorbidities in patients with hidradenitis suppurativa/acne inversa (HS/AI).

METHODS

In a prospective study, 51 patients with HS/AI were further examined for psychiatric comorbidity using a standardized interview and questionnaires.

RESULTS

In psychiatric examination, 29.4% of HS/AI patients had additional mental symptoms, mainly manifested as depressive disorder. The HS/AI patients were rather young and female, and they showed a high incidence of nicotine and alcohol use, and a positive family history of paternal alcohol dependence. In addition, HS/AI patients experienced more severe psychosocial impairments in the form of lack of partnership and lower school attainment.

CONCLUSIONS

Acne inversa is a severe chronic inflammatory skin disease that, like other inflammatory dermatoses, is associated with mental comorbidity and psychosocial impairments. Since especially young patients are affected, a psychiatric-psychotherapeutic cotreatment should be considered already at an early stage.

Hidradenitis suppurativa and Down syndrome: A systematic review and meta-analysis

BACKGROUND

Hidradenitis suppurativa (HS), characterized by inflammatory nodules, sinus tracts, and abscesses, has been linked to several factors, including immune dysfunction and obesity, which are thought to contribute to its development. Several follicular disorders have also been associated with Down syndrome (DS), a common chromosomal disorder, including HS, although studies on this topic are limited.

OBJECTIVES

To characterize HS in Down syndrome patients and to further examine the association between HS and DS compared to HS patients without DS.

METHODS

We systematically searched MEDLINE, Embase, Web of Science, and CENTRAL electronic databases from their dates of conception to February 2020. Random-effects meta-analyses were performed analyzing (a) HS characteristics between DS and non-DS participants, and (b) prevalence or association between HS and DS compared to non-DS individuals.

RESULTS

Twelve studies were included in this systematic review, with a total of 358 participants presenting with both HS and DS. Pooled analysis of mean differences between DS and non-DS participants presenting with HS found a significantly younger age of HS symptom onset for DS patients (-6.24; 95% CI, -10.01--2.24). A meta-analysis examining the association between HS and DS found a significantly increased likelihood of HS in DS patients (OR 9.61; 95% CI, 5.70-16.20).

CONCLUSIONS

Our findings suggest an association between HS and DS, with DS patients suffering from an earlier onset of HS symptoms compared to non-DS patients.

Hidradenitis suppurativa in pediatric patients

Interest in and research on hidradenitis suppurativa (HS) have increased during the past decade, resulting in expanded knowledge about associated comorbidities and treatment efficacy. Knowledge about pediatric-onset HS is still limited, based on case studies, small case series, and extrapolation from adult studies. With increasing prevalence of childhood obesity, decreasing pubertal age, and increasing awareness of HS, physicians may start encountering younger HS patients. This review presents an updated discussion on the epidemiology, pathophysiology, and associated comorbidities in HS, with a focus on pediatric and adolescent patients. It also suggests recommendations for investigation and treatment based on current evidence.

Hidradenitis suppurativa and psychiatric comorbidities, suicides and substance abuse: systematic review and meta-analysis

Background

Hidradenitis suppurativa (HS) is a chronic inflammatory skin disorder of the hair follicles, and has been associated with a multitude of systemic disorders and pathologies. There is increasing evidence to suggest that chronic inflammatory skin disorders may be associated with psychiatric comorbidities, however this relationship has not been well established. We aimed perform a systematic review and meta-analysis to assess the association between HS and psychiatric comorbidities, suicide and substance abuse.

Methods

A systematic review and meta-analysis was performed according to PRISMA guidelines.

Results

HS cases had a significantly higher odds of having schizophrenia compared to the control group (OR 1.66, 95% CI: 1.53–1.79, P<0.00001). There was also a significant association with bipolar disorders (OR 1.96,95% CI: 1.65–2.33, P<0.00001), depression (OR 1.75, 95% CI: 1.44–2.13, P<0.00001), anxiety (OR 1.71, 95% CI: 1.51–1.92, P<0.00001), and personality disorders (OR 1.50, 95% CI: 1.18–1.92, P=0.001), suicide (OR 2.08, 95% CI: 1.27–3.42, P=0.004), substance-related disorders (OR 2.84, 95% CI: 2.33–3.46, P<0.00001), and alcohol abuse (OR 1.94, 95% CI: 1.43–2.64, P<0.0001).

Conclusions

For dermatologists treating patients with HS, screening for these comorbidities, psychiatric referral and adequately managing pain will improve the overall wellbeing of patients.

Hidradenitis suppurativa in paediatric patients: a retrospective monocentric study in Germany and review of the literature

BACKGROUND

Hidradenitis suppurativa (HS) is a chronic, inflammatory, recurrent, debilitating skin disease of the hair follicle affecting apocrine glands-rich areas of the body. The disease usually occurs after puberty leading to painful nodules, abscesses, tunnels and scarring. Although uncommonly, HS can also occur in children and adolescents.

OBJECTIVE

Our objective was to describe the epidemiology, characteristics, predisposing factors and clinical course of HS in paediatric patients.

METHODS

The retrospective cohort study included patients with HS, who have been diagnosed in Dessau Medical Center and reported development of HS during childhood or adolescence, fulfilled the diagnostic criteria for HS and had a follow-up period of at least one year. A systematic review was conducted on MEDLINE, EMBASE and CENTRAL on 19 March 2020 using the terms 'hidradenitis' or 'acne inversa' together with the terms 'children', 'paediatric' and 'adolescence'.

RESULTS

Twenty paediatric patients [1 child (0.22%), 19 adolescents (4.25%)] were detected out of 447 patients evaluated (4.5%) with a male to female ratio of 1.86 : 1. The median age at diagnosis was 17 years [interquartile range (IQR) 16-18] and the median age at onset 15 years (IQR: 14-16.5). The majority of the patients suffered from moderate disease were overweight or obese and non-smokers. The most common comorbid disorder was acne vulgaris. The systematic review revealed reports with data heterogeneity and lack of systematic documentation of specific demographic characteristics. Most paediatric patients were female, obese and non-smokers, with considerable comorbid disorders.

CONCLUSIONS

Hidradenitis suppurativa in Germany may affect children and adolescents exhibiting a particular phenotype of mainly male non-smokers.

Weight counseling in pediatric hidradenitis suppurativa patients

BACKGROUND/OBJECTIVES

Hidradenitis suppurativa is a chronic, painful, debilitating disease that may present in the pediatric years. Overweight and obesity are believed to worsen disease severity, but many patients do not receive counseling regarding weight control. The objective of this study is to examine the percentage of hidradenitis suppurativa patients who receive weight counseling as a part of their disease management and which specialties primarily care for these patients.

METHODS

We performed a retrospective chart review of pediatric hidradenitis suppurativa patients between January 2011 and October 2018. Demographic data, height, weight, body mass index, body mass index percentiles, number of visits per department, referrals to the Center for Healthy Weight and Nutrition, and referring provider department data were collected.

RESULTS

A total of 535 pediatric hidradenitis suppurativa patients were reviewed; 79.6% were female, and the mean age at diagnosis was 14.5 years. 11.6% of patients were overweight, and 54.2% were obese. 32.1% of overweight and obese hidradenitis suppurativa patients received a referral to the Center for Healthy Weight and Nutrition. The majority of referrals were placed by Primary Care. Dermatology placed 7.1% of the referrals to the Center for Healthy Weight and Nutrition for these patients.

CONCLUSIONS

The results suggest that there is a need for increased awareness, education, and counseling on weight management and nutrition for pediatric hidradenitis suppurativa patients. Further studies are needed to determine the success of counseling on weight control and disease severity.

Management of adolescents with hidradenitis suppurativa

Hidradenitis suppurativa (HS) can have devastating impacts on quality of life (QoL), especially during adolescence when patients face unique challenges related to self-esteem, body-image, and sexual maturation. Many teenage HS patients also experience social challenges related to school, relationships, and employment that may require physician intervention. Strategies for comprehensive management of this special group include addressing low medication adherence, screening for comorbidities, and recommending practical lifestyle modifications to reduce disease flares. Herein, we review the impact of HS on adolescent patients and provide practical recommendations to minimize effects on the adolescent life course.

Association of Hidradenitis Suppurativa With Inflammatory Bowel Disease: A Systematic Review and Meta-analysis

Importance

Hidradenitis suppurativa (HS) and inflammatory bowel disease (IBD) are inflammatory diseases that share common genetic susceptibility and immunologic features. However, the link between HS and IBD has been largely unclear.

Objective

To conduct a meta-analysis to investigate the association between HS and IBD.

Data Sources

A search of the MEDLINE, Cochrane Central Register of Controlled Trials, and Embase databases yielded 397 relevant studies from inception to June 10, 2018. Two additional studies were supplied by one of the investigators.

Study Selection

Case-control, cross-sectional, or cohort studies that examined the odds or risk of IBD in patients with HS were included. No geographic or language limitations were imposed.

Data Extraction and Synthesis

The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed. The Newcastle-Ottawa Scale was used to assess the risk of bias of included studies. Crohn disease and ulcerative colitis were analyzed separately, and a random-effects model meta-analysis was conducted.

Main Outcomes and Measures

The odds ratios (ORs) and hazard ratios (HRs) of IBD, Crohn disease, and ulcerative colitis in association with HS.

Results

Five case-control studies, 2 cross-sectional studies, and 1 cohort study with a total of 93 601 unique participants were included. The meta-analysis of case-control and cross-sectional studies showed significant associations of HS with Crohn disease (pooled OR, 2.12; 95% CI, 1.46-3.08) and ulcerative colitis (pooled OR, 1.51; 95% CI, 1.25-1.82). Two case-control studies found significant association of HS with IBD (ORs, 2.16 [95% CI, 1.40-3.34] and 10.00 [95% CI, 1.94-51.50]). One cohort study found an increased risk of IBD in patients with HS (HR, 5.6; 95% CI not reported; P < .002).

Conclusions and Relevance

The evidence to date supports an association of HS with IBD. These results suggest that consultation with gastroenterologists should be sought when patients with HS present with recurrent abdominal pain, chronic diarrhea, bloody stool, and body weight loss.

North American clinical management guidelines for hidradenitis suppurativa: A publication from the United States and Canadian Hidradenitis Suppurativa Foundations: Part I: Diagnosis, evaluation, and the use of complementary and procedural management

Hidradenitis suppurativa is a chronic inflammatory disorder affecting hair follicles, with profoundly negative impact on patient quality of life. Evidence informing ideal evaluation and management of patients with hidradenitis suppurativa is still sparse in many areas, but it has grown substantially in the last decade. Part I of this evidence-based guideline is presented to support health care practitioners as they select optimal management strategies, including diagnostic testing, comorbidity screening, and both complementary and procedural treatment options. Recommendations and evidence grading based on the evidence available at the time of the review are provided.

Comorbidities in Dermatology: What's Real and What's Not

Comorbidities affecting dermatologic patients are of significant importance to providers and highly relevant for appropriate patient counseling, screening practices, prevention, and treatment. This article seeks to highlight several of the newest findings in the literature regarding comorbidities associated with dermatologic diseases including atopic dermatitis, hidradenitis suppurativa, alopecia areata, chronic urticaria, and the pemphigus family of immunobullous diseases. Further investigation is needed for associations between atopic dermatitis and pancreatic cancer and pemphigus family diseases and chronic obstructive pulmonary disease in order to better characterize the strength of these associations and clinical relevance.

A Dermatological Questionnaire for General Practitioners with a Focus on Hidradenitis Suppurativa

BACKGROUND:

Hidradenitis suppurativa (HS) is a skin chronic inflammatory disease typically located in several areas such as perianal, inguinal and axillary regions. In 40% to 70% of cases, general practitioners (GPs) are the first health care professionals consulted by patients suffering from HS. The role of GPs in HS management could be more substantial than it has been in the past.

AIM:

We developed a questionnaire to assess the knowledge of HS by GPs and to evaluate if in their perception the dermatologist is the reference medical doctor for pathology above.

METHODS:

The data were processed by a univariate descriptive statistical analysis.

RESULTS:

Our study showed GPs could recognise patients affected by HS. They have proven to know the main features of HS. Nevertheless, the second part of the questionnaire has highlighted the considerable confusion of GPs about who the reference figure is.

CONCLUSION:

The data registered regarding therapy and follow up too, only show a mild preponderance of dermatologist compared to other professional figures, such as a surgeon, GPs and plastic surgeon.