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Int J Trichology 2020 Jan-Feb;12(1):35-37. Epub 2020 Apr 9.

Division of Dermatology, Al-Sadr Teaching Hospital, Basra, Iraq.

Acne conglobata (AC) is a rare form of severe and chronic nodulocystic acne. It is characterized by nodulocystic lesions, borrowing, interconnecting abscesses, scars, in addition to grouped comedones. AC usually appears on the trunk and may extend to the buttocks. Read More

Dermatol Online J 2020 Feb 15;26(2). Epub 2020 Feb 15.

Department of Dermatology, University of Illinois at Chicago, Chicago, IL.

Follicular occlusion triad is a symptom complex of three conditions with a similar pathophysiology including hidradenitis suppurativa (HS), dissecting cellulitis of the scalp, and acne conglobata. Although the exact pathogenesis of the triad is unknown, it appears to be related to follicular occlusion in areas with apocrine glands. Wolf isotopic response refers to the occurrence of a new dermatosis at the site of another, unrelated, previously healed dermatosis. Read More

Dermatology 2020 6;236(1):15-20. Epub 2020 Jan 6.

ResoVerneuil, Paris, France,

Background: The factors that determine whether an area of the body will be affected by hidradenitis suppurativa (HS) are unknown.

Methods: To address these factors, we performed multivariate regression analyses in a cohort of 1,138 patients.

Results: We found that the body sites affected occurred in specific combinations that were influenced by sex and body mass index. Read More

Sao Paulo Med J 2019;137(4):363-368. Epub 2019 Oct 31.

MD, PhD. Dermatologist and Associate Professor, Department of Dermatology, Escola Paulista de Medina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo (SP), Brazil.

Background: Acne needs to be treated early to prevent negative psychosocial impacts. In severe or moderate forms, which tend to leave scars, oral isotretinoin is the first-line therapy. However, concern about its adverse events, especially in developed countries, delays effective treatment. Read More

J Eur Acad Dermatol Venereol 2019 Oct;33 Suppl 6:36-39

Dermatology Clinic, University of Catania, Catania, Italy.

The case of a 24-year-old male patient affected by follicular occlusion tetrad (acne conglobata, hidradenitis suppurativa, pilonidal cyst and dissecting cellulitis of the scalp) associated with clinical signs of pachyonychia congenita (PC)-2 (focal palmoplantar keratoderma, plantar pain, onycodystrophy and multiple cysts) is reported. The diagnosis was supported by genetic analysis that showed heterozygous mutation within the exon 1 of KRT17 gene. This case may reflect different expressions of a phenotypic spectrum induced by a common genetic alteration. Read More

Clin Case Rep 2019 Sep 10;7(9):1769-1772. Epub 2019 Aug 10.

FB Dermatology Denmark Limited Aps. Ballerup Denmark.

The Kleresca biophotonic platform utilizing fluorescent light energy (FLE) effectively treated both acne conglobata and hidradenitis suppurativa. FLE decreased the presence of inflammatory nodules, cysts, and associated erythema. It also supported a healing response to improve skin texture. Read More

BMC Dermatol 2019 07 23;19(1):11. Epub 2019 Jul 23.

Department of Dermatology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.

Background: Hidradenitis suppurativa is one member of the follicular occlusion triad: acne conglobata, hidradenitis suppurativa, and dissecting cellulitis of the scalp. The presence of acantholysis and desmoglein autoantibodies in hidradenitis suppurativa is rare.

Case Presentation: We report a case of 68-year-old male with a diagnosis of gluteal hidradenitis suppurativa co-presenting pemphigus-like findings including acantholysis and positive desmoglein autoantibodies. Read More

J Dermatol 2019 Sep 4;46(9):802-807. Epub 2019 Jul 4.

Department of Dermatology, Tohoku University Graduate School of Medicine, Sendai, Japan.

Perifolliculitis capitis abscedens et suffodiens (PCAS) or dissecting cellulitis is a rare condition presenting deep follicular occlusions, follicular ruptures and follicular infections in the scalp area with unknown etiology, which consequently cause primary neutrophilic cicatricial alopecia by the repeated follicular inflammation. PCAS is categorized as one of the "follicular occlusion tetrad" along with hidradenitis suppurativa, acne conglobata and pilonidal cyst. In the pathogenesis of the follicular occlusion tetrad, the involvement of neutrophils and its activator tumor necrosis factor (TNF) have been discussed. Read More

Br J Hosp Med (Lond) 2019 May;80(5):258-262

Consultant Geriatrician, Proactive Care of Older People undergoing Surgery (POPS), Department of Ageing & Health, Guy's and St Thomas' NHS Foundation Trust, London.

As a consequence of an ageing population greater numbers of elderly patients are presenting for both elective and emergency surgery. These older patients typically present with an increased burden of age-related problems and multimorbidity, which is associated with an increased risk of adverse postoperative outcomes. Traditional preoperative assessment models are adept at discerning patients' suitability for anaesthesia and surgery, but there is minimal focus on improving postoperative outcomes. Read More

Medicine (Baltimore) 2019 Apr;98(16):e15263

Department of Urology, Qilu Hospital of Shandong University, Jinan, China.

Rationale: Follicular occlusion triad (FOT) is an autosomal recessive inherited disease and no more than 3 variants of the triad have been reported. We give a report in which scrotal elephantiasis is a variant of FOT and further perform a literature review.

Patient Concerns: A 41-year-old man came to us because of a large scrotal cyst and generalized skin lesions that had occurred over the past 10 years. Read More

Rev Med Inst Mex Seguro Soc 2019 Jan 28;56(5):441-446. Epub 2019 Jan 28.

SPRIM Américas México, Gerencia de Investigación Clínica. Ciudad de México, México

Background: The use of isotretinoin is indicated in the treatment of severe acne; however, its adverse effects are important.

Objective: To update the first Mexican Consensus on the use of isotretinoin in severe acne vulgaris, which took place in 2009.

Methods: It was carried out a literature search between June 2009, and February 2015, in order to evaluate topics to be discussed; materials were sent to the experts to promote the debate among participants. Read More

J Am Acad Dermatol 2019 Jun 7;80(6):1533-1537. Epub 2019 Feb 7.

Department of Dermatology, Donald and Barbara Zucker School of Medicine at Hofstra Northwell, New Hyde Park, New York. Electronic address:

Background: Hidradenitis suppurativa (HS) and pyoderma gangrenosum (PG) are reported to coexist, although the prevalence of PG among patients with HS has not been systematically evaluated.

Objective: To evaluate PG prevalence among patients with HS.

Methods: Cross-sectional analysis of adults with PG among patients with HS and patients without HS through use of electronic health records data from a population-based sample of 55 million patients. Read More

Clin Exp Dermatol 2019 Oct 22;44(7):777-780. Epub 2019 Mar 22.

Department of Dermatology, Tallaght University Hospital, Tallaght, Dublin 24, Ireland.

We report eight cases of patients with severe acne who were treated with isotretinoin and developed painful nodules in the axillae and groin, consistent with hidradenitis suppurativa (HS). The pathogenesis of HS is still not completely understood; recent research from a study in 2011 of biopsies from HS lesions showed a reduction or absence of sebaceous glands compared with normal skin in patients with HS, with the report suggesting that this contributes to the pathogenesis of the disease. Interestingly, the main effect of isotretinoin is to decrease the size and action of sebaceous glands, so hypothetically, as isotretinoin acts by reducing the sebaceous glands further it could potentially aggravate HS. Read More

Clin Exp Dermatol 2019 Oct 17;44(7):804-806. Epub 2019 Jan 17.

Department of Dermatology, Heart of England NHS Foundation Trust, West Midlands, UK.

Ann Dermatol Venereol 2019 Jan 5;146(1):1-3. Epub 2018 Dec 5.

2, rue du cherche-midi 75006 Paris, France.

Dermatology 2019 26;235(1):45-50. Epub 2018 Oct 26.

Dermatology Department, Hospital Universitario San Cecilio, Granada, Spain.

Background/aims: Hidradenitis suppurativa (HS) is a chronic inflammatory and destructive skin disorder. Early diagnosis and treatment are critical to stop its progression. Data concerning adolescent-onset HS are scarce. Read More

Ann Dermatol Venereol 2019 Jan 14;146(1):4-8. Epub 2018 Sep 14.

11, chaussée de la Muette, 75016 Paris, France. Electronic address:

Background: Isotretinoin is the most potent treatment for acne but paradoxical flares can occur. HS lesions of the face may be mistaken for acne. We report on 4 patients in whom an "acne" flare on isotretinoin led to the correct diagnosis of HS. Read More

Oman Med J 2018 Sep;33(5):433-436

Department of Dermatology, Sultan Qaboos Hospital, Salalah, Oman.

Nodulocystic acne is a severe form of acne which can result in significant damage to the skin with great impact on quality of life. Oral isotretinoin considered to be the best treatment for such cases. Although it has a high rate of success and its efficacy is well established in the treatment of nodulocystic acne, it may occasionally fail to control the disease. Read More

J Dtsch Dermatol Ges 2018 Oct 31;16(10):1219-1226. Epub 2018 Aug 31.

Department of Dermatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.

Background And Objectives: Dissecting folliculitis (DF) or dissecting cellulitis of the scalp is regarded as a rare disease with disfiguring scarring alopecia. This study aimed to analyze the features of DF and to propose a classification to define its severity.

Patients And Methods: A hospital-based retrospective study was conducted. Read More

Indian J Dermatol Venereol Leprol 2018 Sep-Oct;84(5):617-619

Department of Clinical and Experimental Medicine, Dermatology Unit, University Hospital "G. Martino," Messina, Italy.

J Eur Acad Dermatol Venereol 2018 Oct 31;32(10):1784-1790. Epub 2018 May 31.

Department of Dermatology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Suwon, Korea.

Background: The prevalence of hidradenitis suppurativa (HS) in Asia is unknown. The associations between HS and other autoimmune disorders have rarely been reported.

Objective: We sought to determine the prevalence of and diseases associated with HS using the National Health Insurance (NHI) database. Read More

Wiad Lek 2018;71(2 pt 1):297-300

Danylo Halytsky Lviv National Medical University, Lviv, Ukraine.

Objective: Introduction: Acne is chronic recurrent dermatosis, one of the essential skin inflammation in the structure of dermatological pathology, especially in young people of working age, often caused by persistent cicatricial changes in the skin, and affecting negatively the psychoemotional state of patients, their quality of life and working capacity. It has been established by today that the pathogenesis acne is complex and multifactorial, and the changes of immune reactivity of the organism play an important role in its clinical course development. The aim of the article is to determine and analyze the values of the systemic immunity in patients suffering from acne with different clinical course. Read More

Semin Musculoskelet Radiol 2018 Apr 19;22(2):207-224. Epub 2018 Apr 19.

Department of Radiology, Nuffield Orthopaedic Centre, Oxford University Hospitals NHS Trust, Oxford, United Kingdom.

The syndromes synovitis, acne, pustulosis, hyperostosis, and osteitis (SAPHO) and chronic recurrent multifocal osteomyelitis (CRMO) constitute a group of chronic relapsing inflammatory osteoarticular disorders with frequently associated skin eruptions such as palmoplantar pustulosis and acne conglobata and rather characteristic imaging features in the form of osteitis and/or hyperostosis. CRMO predominantly occurs in children/adolescents and SAPHO in adults. Any skeletal site can be involved, and the imaging appearances vary, depending on the patient's age and the stage/age of the lesion. Read More

Cutis 2017 Dec;100(6):E23-E26

Department of Pediatrics, Department of Medicine, Division of Dermatology and Cutaneous Sciences, University of Alberta, Edmonton, Canada.

Acne fulminans is an uncommon and debilitating disease that presents as an acute eruption of nodular and ulcerative acne lesions in association with systemic symptoms. It occurs commonly during treatment of severe acne (eg, acne conglobata) with isotretinoin in young adolescent male patients. Isotretinoin and doxycycline also can potentially induce development of neutrophilic dermatoses in patients with severe acne lesions, which are characterized by the acute appearance of painful ulcerative papulonodules accompanied by systemic symptoms including fever and leukocytosis. Read More

J Am Acad Dermatol 2018 02;78(2):377-382

Research Unit Dermatopathology, Department of Dermatology, Medical University of Graz, Graz, Austria. Electronic address:

Background: Hemophagocytosis is well known in cytotoxic cutaneous T-cell lymphomas (CTCLs), in which it may represent a sign of hemophagocytic lymphohistiocytosis syndrome (HLHS), and is also typical of cutaneous Rosai-Dorfman disease (cRDD) (without prognostic relevance). Only rarely, has cutaneous hemophagocytosis (CH) been described in other skin conditions.

Objective: To characterize the clinicopathologic features of CH in skin biopsy specimens from patients with conditions other than CTCL or cRDD. Read More

Skin Appendage Disord 2017 Oct 14;3(4):215-218. Epub 2017 Jun 14.

Department of Dermatology, St. George Hospital, University of New South Wales, Sydney, NSW, Australia.

Hidradenitis suppurativa (HS) is a chronic and debilitating suppurative disease primarily affecting the axillae, perineum, and inframammary regions, where apocrine sweat glands are present. However, HS can occur in atypical locations. We present an interesting case of a 40-year-old man who developed chronic painful subcutaneous nodules, deep sinus tracts, and abscesses involving the jawline and the anterior aspect of the neck as the only parts of the body affected and who responded satisfactorily to adalimumab and laser hair removal treatment. Read More

Int J Womens Dermatol 2017 Sep 13;3(3):145-150. Epub 2017 Jul 13.

Department of Dermatology, University of Connecticut Health Center, Farmington, CT.

The treatment of acne during pregnancy is often limited by the potential toxicities that are posed to the fetus by the most common and effective acne therapies. As with all dermatoses during pregnancy, the treatment of acne vulgaris in this population requires a thorough understanding of the risks and benefits that are inherent to each treatment. We report on a case of a 30-year-old pregnant patient with severe acne conglobata who showed significant improvement with a combination treatment of topical modalities, oral metronidazole, and low dose prednisone during pregnancy. Read More

Eur J Dermatol 2017 06;27(3):320-321

Department of Dermatology, Allergology, Universitiy Hospital of Aachen, Pauwelsstr. 30, 52074 Aachen, Germany.

Am J Med Genet A 2017 Jul 7;173(7):1903-1906. Epub 2017 May 7.

Department of Dermatology, Red Cross Sendai Hospital, Sendai, Japan.

Trisomy 13 (T13) is a congenital chromosomal disorder that is usually fatal within 2 years of birth, and only a few patients have been reported to reach adolescence. Here, we report a male long-term survivor of T13, currently 15 years of age, with a several-year history of extensive acne conglobata (AC) with abscesses on the face and neck. Methicillin-resistant Staphylococcus aureus was consistently isolated from the pustular lesions. Read More

Acta Derm Venereol 2017 Aug;97(8):969-970

Dermatology Clinic, University of Catania, AOU Policlinico-Vittorio Emanuele, Via Santa Sofia, 78, IT-95123, Catania, Italy. *E-mail:

Clin Dermatol 2017 Mar - Apr;35(2):138-146. Epub 2016 Oct 27.

Department of Dermatology, Andreas Syggros Hospital, University of Athens, 5, Dragoumi str, 16121, Athens, Greece.

Acne is the most common of skin diseases, being characterized as a chronic inflammatory disease of the pilosebaceous unit. Although acne is usually straightforward to diagnose and treat, some patients have difficult or rare forms of acne. What seems to be "nonresponding acne" in a patient may be caused by another acneiform disease that clinically mimics acne, thus misleading the clinician, if not ruled out, with scrutiny. Read More

Int J Dermatol 2017 Jun 14;56(6):660-663. Epub 2017 Feb 14.

Department of Dermatology and Allergology, Ludwig-Maximilians University, Munich, Germany.

Background: Hidradenitis suppurativa (HS) has recently been described as a component of two autoinflammatory syndromes: PASH (pyoderma gangrenosum, acne, and HS) and PAPASH (pyoderma gangrenosum, acne, pyogenic arthritis, and HS). These associations together with others such as inflammatory bowel diseases suggest that defects in autoinflammatory pathways may play a role in the pathogenesis of HS.

Objectives: To describe clinical and genetic characteristics of two unrelated patients with HS and familial Mediterranean fever (FMF). Read More

Reumatol Clin 2018 Mar - Apr;14(2):109-112. Epub 2016 Dec 16.

Unidad de Gestión Clínica de Pediatría, Hospital Universitario San Cecilio, Granada, España.

The acronym of SAPHO syndrome (synovitis, acne, pustulosis, hyperostosis and osteitis) combines a cluster of cutaneous and musculoskeletal manifestations, such as hyperostosis of bones of the anterior chest wall associated with acne fulminans and hidradenitis suppurativa. There are no validated diagnostic criteria in children. Nonsteroidal anti-inflammatory drugs are not always sufficient, and the use of corticosteroids, disease-modifying agents, tumor necrosis factor-α inhibitors or bisphosphonates may be necessary. Read More

G Ital Dermatol Venereol 2016 Oct;151(5):553-7

Section of Dermatology, Department of Medical Sciences, S. Anna Hospital, Ferrara University Hospitals, Ferrara, Italy -

Rosacea fulminans, previously called pyoderma faciale, is an inflammatory disease considered a dramatic form of rosacea rather than of acne. Typical features are: exclusive facial involvement of young women, sudden onset of large nodules without other signs of acne, remission without scarring or with minimal scars, no recurrences or systemic symptoms. Oral isotretinoin associated with a short course of systemic and topical corticosteroids represent the recommended treatment. Read More

Neth J Med 2016 Jul;74(6):272

Department of Internal Medicine, Division of Tropical Diseases, Academic Medical Centre, Amsterdam, the Netherlands.

Dermatol Ther 2016 Nov 18;29(6):455-458. Epub 2016 Jul 18.

Department of Dermatology, Brigham and Women's Hospital.

Hidradenitis suppurativa is a member of the follicular occlusion tetrad, along with acne conglobata, dissecting cellulitis of the scalp and pilodinal sinus. These conditions share common pathophysiologic features, including follicle occlusion, bacterial overgrowth, severe suppurative inflammation, scarring, and sinus tract formation. Treatment of severe cases is challenging, and a novel treatment modality would be of significant value. Read More

Dent Update 2016 Jan-Feb;43(1):93-4

Australas J Dermatol 2017 May 2;58(2):e54-e59. Epub 2016 Feb 2.

Clinic of Dermatovenereology, Clinical Centre of Serbia, Belgrade, Serbia.

The clinical triad of pyoderma gangrenosum, acne conglobata and hidradenitis suppurativa has been named PASH syndrome. Polycystic ovary syndrome (PCOS) is associated with hyperandrogenism and inflammation. Hidradenitis suppurativa, like acne vulgaris, may be a feature of hyperandrogenism. Read More

Exp Dermatol 2016 Apr 11;25(4):314-6. Epub 2016 Feb 11.

Green Cross Voluntary Blood Bank, Ahmedabad, India.

Indian Dermatol Online J 2015 Jul-Aug;6(4):253-7

Department of Dermatology, Molecular Dermatology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.

Background: Elevation of C-reactive protein (CRP) has been reported to occur in psoriasis, urticaria, acne, rosacea and many other dermatological and nondermatological conditions. Chronic systemic inflammation has been implicated in the development of neuropsychiatric/degenerative disorders, atherosclerosis, coronary artery disease, diabetes mellitus and even carcinogenesis. The present study is designed to determine whether the level of inflammation created by acne vulgaris could be high enough to raise the serum levels of high-sensitive CRP. Read More

Dermatol Ther 2015 May-Jun;28(3):158-65. Epub 2015 Mar 3.

Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark.

Tumor necrosis factor-alpha (TNF)-alpha inhibitors are licensed for patients with severe refractory psoriasis and psoriatic arthritis. However, TNF-alpha inhibitors have also been used off-label for various recalcitrant mucocutaneous diseases. This study aimed to evaluate the efficacy and safety of TNF-alpha inhibitors used for off-label dermatological indications. Read More

Clin Exp Dermatol 2015 Jun 26;40(4):383-6. Epub 2014 Dec 26.

Dermatology Centre, Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, University of Manchester, Manchester, UK.

Acne conglobata (AC) is a chronic, severe, inflammatory variant of acne characterized by development of cystic nodules, abscesses and sinus tracts. AC may prove resistant to conventional acne therapy. The off-label use of adalimumab for the treatment of AC has been reported recently. Read More

Indian Dermatol Online J 2014 Oct;5(4):491-3

Department of Dermatology, Cutis Academy of Cutaneous Sciences, Bangalore, Karnataka, India.

Follicular occlusion tetrad is a symptom complex consisting of four conditions having a similar pathophysiology. It includes Hidradenitis suppurativa, acne conglobata, dissecting cellulitis of the scalp and pilonidal sinus. The exact pathogenesis of this group of disease is unknown but evidence suggests that they share the same pathological process initiated by follicular occlusion in apocrine gland bearing areas. Read More

Skeletal Radiol 2015 Jan 21;44(1):9-24. Epub 2014 Oct 21.

Department of Radiological Sciences, Catholic University, School of Medicine, Largo A. Gemelli 1, 00168, Rome, Italy,

The synovitis, acne, pustulosis, hyperostosis, and osteitis (SAPHO) syndrome includes a group of chronic, relapsing, inflammatory musculoskeletal disorders with similar manifestations, in particular synovitis, hyperostosis, and osteitis, which may or may not be associated with neutrophilic skin eruptions such as palmoplantar pustulosis and acne conglobata. The syndrome occurs at any age, can involve any skeletal site, and its imaging appearances are variable, depending on the stage/age of the lesion and imaging method. The diagnosis is difficult if there is no skin disease. Read More

J Am Acad Dermatol 2015 Mar 12;72(3):550-3. Epub 2014 Aug 12.

Dermatology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland. Electronic address:

Key teaching points • Synovitis-acne-pustulosis-hyperostosis-osteitis (SAPHO) syndrome is characterized by distinctive osteoarticular manifestations and a spectrum of neutrophilic dermatoses. • The most common dermatologic manifestations include palmoplantar pustulosis, acne conglobata, and acne fulminans. • SAPHO syndrome should be considered in patients presenting osteoarticular pain, particularly involving the anterior chest wall and/or spine, and neutrophilic skin lesions. Read More

Dermatol Online J 2014 Apr 16;20(4):22373. Epub 2014 Apr 16.

Weil Cornell Medical College.

This article is dermatological atlas of the morphologic presentations of Hidradenitis Suppurativa (HS). It includes: superficial abscesses (boils, furnucles, carbuncles), abscesses that are subcutaneous and suprafascial, pyogenic granulomas, cysts, painful erythematous papules and plaques, folliculitis, open ulcerations, chronic sinuses, fistulas, sinus tracts, scrotal and genital lyphedema, dermal contractures, keloids (some that are still pitted with follicular ostia), scarring, skin tags, fibrosis, anal fissures, fistulas (i.e. Read More

J Adolesc Health 2014 Aug 13;55(2):304-6. Epub 2014 Apr 13.

Rheumatology Research Unit, Molecular Medicine Institute, Faculty of Medicine, Lisbon University, Lisbon, Portugal; Rheumatology Department, Hospital de Santa Maria, Lisbon, Portugal.

SAPHO (synovitis, acne, pustulosis, hyperostosis, and osteitis) syndrome includes both dermatological and rheumatologic symptoms. Being a rare condition, the diagnosis is frequently late. The authors report a case of a 13-year-old boy diagnosed with synovitis, acne, pustulosis, hyperostosis, and osteitis syndrome with unusual severe systemic repercussions. Read More

Dermatol Online J 2014 Mar 17;20(3). Epub 2014 Mar 17.

Weil Cornell Medical College.

Although rare, severe hidradenitis suppurativa (HS) of the anal, perianal, gluteal, thigh, and groin regions can evolve into squamous cell carcinoma (SCC). This usually does not occur until the HS has been present for more than 20 years. Malignant degeneration of HS in the axilla has not been reported. Read More