What's new in acne inversa (alias hidradenitis suppurativa)?

Hidradenitis suppurativa and its association with obesity, smoking, and diabetes mellitus: A systematic review and meta-analysis

Our meta-analysis aimed to quantify the association between Hidradenitis suppurativa (HS) and several risk factors including obesity, smoking, and type 2 diabetes mellitus (T2DM). We searched PubMed, Scopus, Embase, Web of Science, and cumulative index to nursing and allied health literature for articles reporting either the odds ratio (OR) or the numbers of HS cases associated with obesity, smoking, or T2DM, and including HS negative controls. Risk of bias was assessed against the risk of bias in non-randomized studies of interventions tool. Data synthesis was done using the random effects model with heterogeneity being evaluated with I2 statistic. Twenty-three studies with a total of 29 562 087 patients (average age of 36.6 years) were included. Ten studies relied on country-level data, while six studies collected their data from HS clinics. The analysis showed a significant association between HS and female sex (OR 2.34, 95% CI 1.89-2.90, I2 = 98.6%), DM (OR 2.78, 95% CI 2.23-3.47, I2 = 98.9%), obesity (OR 2.48, 95% CI 1.64-3.74, I2 = 99.9%), and smoking (OR 3.10 95% CI 2.60-3.69, I2 = 97.1%). Our meta-analysis highlights HS links to sex, DM, obesity, and smoking, with emphasis on holistic management approach. Further research is needed on molecular mechanisms and additional risk factors for improved patient care.

Obstacles to Early Diagnosis and Treatment of Hidradenitis Suppurativa: Current Perspectives on Improving Clinical Management

Hidradenitis suppurativa (HS) is a chronic inflammatory skin condition that can progress to significant tunnels and scars that affect quality of life, especially if diagnosis and treatment are delayed. Average delay after initial presentation of HS symptoms can range from 3 to 10 years in adults and 1 to 2 years in children. Factors associated with diagnostic delay include female gender, non-white race, and greater disease severity at diagnosis. Contributing factors include misdiagnoses, difficulty accessing a dermatologist, hesitation in seeking care due to the stigmatizing nature of the disease, and lack of awareness among providers and patients. While efforts to increase awareness include academic talks at conferences and by foundations geared toward HS, social media offers the opportunity to reach young audiences. Many patients report dissatisfaction with their HS treatments. Better understanding of HS pathophysiology and implementation of clinically focused phenotypes and endotypes can lead to development of more targeted and efficacious therapies. FDA approval of medications for HS beyond adalimumab will increase access to a wider selection of therapies, and implementation of therapeutic drug monitoring may maximize the use of biologics for HS.

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.

Pustular diseases and keratinocyte-myeloid synergy

Pustules are among the most common lesions produced in human skin. Infections by pathogens and drug-induced reactions are frequent causes of pustule formation. In recent years immune-mediated pustular diseases have drawn attention. It is proposed to classify pustular diseases according to the initiating events and sites: purely epidermal pustules, follicular pustules or pustules noted in autoinflammatory syndromes. The unifying pathology in all of the three categories is a microinvasion of activated neutrophils into epidermal or adnexal epithelia. Formation of pustules involves established IL-17 / IL-23, IL-36 / IL-36RN driven pathology, or IL-1 /caspase-activated autoinflammation. Pathophysiology demonstrates an intriguing synergy of keratinocytes with neutrophils. This is called keratinocyte-myeloid synergy (KMS). Non-infectious pustules are formed by IFNα controlling the production of chemoattractants (IL-8, LTB4) or induced by IL-1-regulated inflammasomes and caspase/ IFNβ-induced chemotaxins. The presence of physical barriers, for example, cornified cell layers (str. corneum), is instrumental in establishing chemotactic gradients and blocking migrating neutrophils. In follicular KMS-driven pustular disorders, in contrast to epidermal pustules, neutrophil-mediated toxicity propagates lasting and expanding ulcerating diseases with increased levels of circulating immunoglobulin A (IgA). Complexed IgA is suggested to propagate ongoing pustular diseases. These are prerequisites essential for developing pustules in burdensome human skin diseases.

Hidradenitis Suppurativa

Background:

Hidradenitis suppurativa is a clinically defined disease that causes considerable morbidity for patients. The results of recent studies, which have increased the understanding of this disease, are reviewed.

Objective:

The epidemiology, risk factors, pathogenesis, and treatment of this disease are summarized to help clinicians with practical patient management.

Conclusion:

Hidradenitis suppurativa remains a clinical challenge to patients and physicians alike. Physicians should be familiar with the impact this disease has on the patient and with the range of treatments available. Use of simple incisions as treatment is strongly discouraged. Additional pathogenic as well as therapeutic studies are necessary.

Hidradenitis Suppurativa in 64 Female Patients: Retrospective Study Comparing Oral Antibiotics and Antiandrogen Therapy

Background:

Hidradenitis suppurativa (HS) is a recurrent disease confined to apocrine gland-bearing areas causing painful, deep-seated lesions and draining sinus tracts. Uniformly effective therapy is lacking. Improvements in current medical management strategies are needed.

Objective:

We sought to determine the success rate for a variety of treatments in our female HS patients and whether androgen-related tests can predict a response to antiandrogen therapy. As HS has been linked to a hyperandrogen state, we sought to determine if it is also associated with polycystic ovary syndrome (PCOS).

Methods:

A retrospective chart review was performed examining hormonal profiles and the response to a variety of treatments in female patients with HS.

Results:

Sixty-four female HS patients were identified (mean age 33 years). Antiandrogen therapy was superior to oral antibiotic therapy (55% vs 26%) based on a two-sample, two-sided, t-test statistic (p < .04). The prevalence of PCOS among our study patients in whom androgen markers were available was 8 of 21 (38.1%), and even if taken over all study patients, not necessarily investigated for PCOS, the prevalence was 8 of 64 (12.5%). This reflects a greater than expected prevalence among all women (10%).

Conclusion:

As a proof-of-concept study, despite limitations inherent in a retrospective chart review, there is sufficient signal to suggest that a hormonal manipulation approach to therapy should be considered in all women presenting with HS. Female patients presenting with HS should prompt investigations for underlying PCOS and insulin resistance.

Acne inversa goes an extra mile than hidradenitis suppurativa

Acne inversa (AI, hidradenitis suppurativa, Velpeau’s disease, Verneuil’s disease) is a severe, chronic inflammatory dermatosis of unknown etiology, detected on the basis of clinical symptoms more frequently in women than in men. Purulent lesions in the form of nodules and inflammatory tumors, fistulas and scars are present in the areas with hair follicles and apocrine glands, most commonly on the armpits, groin, around the anus and pubic region. Acne inversa can lead to physical and mental disorders. Unfortunately, it is often misdiagnosed and ineffectively treated. The paper presents a case of a 46-year-old patient who was successfully treated surgically for AI around the anus and buttocks by excision of the changes and closure of the wound with local flaps and split-thickness skin grafts, taken with dermatome from the rear surface of the thighs. Surgical treatment is the method of choice in the treatment of severe AI.

Hidradenitis suppurativa

Hidradenitis suppurativa (HS) is a chronic, inflammatory, scarring condition involving the intertriginous skin of the axillary, inguinal, inframammary, genital, and perineal areas of the body. It is also referred to as acne inversa and Verneuil disease. Follicular occlusion is the primary event in HS. It is now accepted that the first pathogenetic change is in the pilosebaceous follicular ducts, like acne, and so there has been a move to rename this disorder acne inversa. Despite the legitimate argument that hidradenitis suppurativa is a misnomer, the term has become generally accepted.

Hidradenitis suppurativa/acne inversa: bilocated epithelial hyperplasia with very different sequelae

BACKGROUND

Hidradenitis suppurativa/acne inversa is a chronic, inflammatory, scarring disease in the terminal hair follicle and apocrine gland-bearing areas (skin folds). There is considerable histological evidence that perifolliculitis and follicular hyperkeratosis precede the rupture of the follicle. The timing of the epithelial hyperplasia at the infundibula of inflamed terminal follicles has not yet been clarified.

OBJECTIVES

To clarify the early histopathological life of lesions ('chronology') in hidradenitis suppurativa/acne inversa, focusing on the terminal follicle structure and its surrounding tissue (hyperkeratosis, hyperplasia of follicular epithelium, perifolliculitis and rupture).

METHODS

In total, 485 operative specimens obtained from 128 patients with diagnosed hidradenitis suppurativa/acne inversa (all surgically treated by wide excision) were examined histologically. Two to five histological preparations (total 485) per operation area (total 196) were prepared by multiple slicing.

RESULTS

Hidradenitis suppurativa/acne inversa showed a heterogeneous histological pattern: hyperkeratosis of the terminal follicles (89%), hyperplasia of follicular epithelium (80%), pronounced perifolliculitis (68%) and follicle rupture (24%). Perifolliculitis, follicular hyperkeratosis and hyperplasia occurred prior to the rupture of the follicle. Other histological criteria were: subepidermal cellular inflammatory infiltrate (82%), epidermal psoriasiform hyperplasia (56%), pronounced acute dermal inflammation (28%), pronounced chronic dermal inflammation (49%), and involvement of apocrine glands (52%) and subcutis (31%).

CONCLUSIONS

Infundibular hyperkeratosis, hyperplasia of the follicular epithelium and perifolliculitis are major histopathological characteristics of hidradenitis suppurativa/acne inversa. These apparently precede rupture of the follicle. In particular, hyperplasia of the follicular epithelium probably marks the beginning of sinus formation, which usually spreads horizontally. Psoriasiform hyperplasia of the interfollicular epidermis with subepidermal inflammatory infiltrate might be interpreted as an inflammation-driven process basically identical to that which is evident at the terminal follicle. However, it does not lead to harmful and progressive sequelae like those (rupture, sinus tracts) seen at the terminal follicles.

Hidradenitis suppurativa: a comprehensive review

Hidradenitis suppurativa, also known as acne inversa, is a chronic, often debilitating disease primarily affecting the axillae, perineum, and inframammary regions. Prevalence rates of up to 4% have been estimated. Our understanding of the disease has changed over time. It is now considered a disease of follicular occlusion rather than an inflammatory or infectious process of the apocrine glands. Clinically, the disease often presents with tender subcutaneous nodules beginning around puberty. The nodules may spontaneously rupture or coalesce, forming painful, deep dermal abscesses. Eventually, fibrosis and the formation of extensive sinus tracts may result. The location of the lesions may lead to social embarrassment and the failure to seek medical treatment. Therapies in the past have consisted of long-term antibiotics, antiandrogens, and surgery. New treatments like tumor necrosis factor-alfa inhibitors have given clinicians more options against this difficult disease.

Surgical treatment of hidradenitis suppurativa: case series and review of the literature

The chronic and relapsing nature of hidradenitis suppurativa leads to physical and psychological damage. The absence of a proven cure further worsens the scenario. Patient 1 was a 28-year-old woman with a 10-year history of abscesses and non healing sinuses with foul-smelling discharge from her axilla, submammary and groin areas. This led to an episode of self-harm due to severe depression. After failed medical therapy, she was referred for surgery with wide excision of the skin and healing by secondary intention. Her wounds were managed by our specialist wound clinic with the use of topical and systemic antibiotics and thus remained free from symptoms. Patient 2 was a 32-year-old woman with a similar history for 15 years. Patient 3 was a 41-year-old man with a 20-year history of discharging sinuses and abscesses. All the patients had endured a long period of medical treatment and subsequently required surgery for a long-term relief of symptoms. This has undoubtedly led to psychological symptoms and a decrease in quality of life.