UNASSIGNED: Hailey-Hailey disease is a rare autosomal dominant genodermatosis whose cause is the ATP2C1 gene mutation. A prevalence of 1 in 50,000 cases is estimated and it manifests as grouped flaccid vesicles that break easily. The diagnosis is confirmed with the histopathological study creating an appearance called \"dilapidated brick wall\", identifying dyskeratosis in the form of round bodies and pimples. Treatment ranges from general measures to multiple pharmacological options, with topical corticosteroids being the most commonly used.
UNASSIGNED: Male patient diagnosed with Hailey-Hailey disease. On physical examination we observed a dermatosis disseminated to the neck, trunk, axillary and inguinal folds, and intergluteal region, unilateral, asymmetric with a polymorphous appearance, constitution due to exulceration, erythema, some pustules and flaccid vesicles that coalesced to form eczematous and hypertrophic plaques with the presence of fine scales on their surface, with a chronic evolution accompanied by pruritus. We also took the opportunity to review the most relevant information in the literature regarding Hailey-Hailey disease, especially focused on the therapeutic aspect.
UNASSIGNED: It is important to take into account that Hailey-Hailey disease is a rare pathology, in order to make a differential diagnosis in daily clinical practice.
UNASSIGNED: la enfermedad de Hailey-Hailey es una rara genodermatosis autosómica dominante cuya causa es la mutación del gen ATP2C1. Se estima una prevalencia de 1 por cada 50,000 casos y se manifiesta como vesículas flácidas agrupadas que se rompen con facilidad. El diagnóstico se confirma con el estudio histopatológico que crea una apariencia denominada “pared de ladrillo dilapidada” y se identifica disqueratosis en forma de cuerpos redondos y granos. El tratamiento comprende desde medidas generales hasta múltiples opciones farmacológicas y los corticoesteroides tópicos son los más utilizados.
UNASSIGNED: paciente del sexo masculino con diagnóstico de enfermedad de Hailey-Hailey. A la exploración física observamos una dermatosis diseminada a cuello, tronco, pliegues axilares, inguinales y región interglútea, de manera unilateral, asimétrica, de aspecto polimorfo, constituida por exulceración, eritema, algunas pústulas y vesículas flácidas que confluían para formar placas eccematosas e hipertróficas con escama fina, de evolución crónica, acompañada de prurito. Además, aprovechamos la oportunidad para revisar la informacion más relevante en la literatura con respecto a la enfermedad de Hailey-Hailey, especialmente enfocados en el aspecto terapéutico.
es importante tener en cuenta que la enfermedad de Hailey-Hailey es una patología rara, a fin de hacer un diagnóstico diferencial en la práctica clínica rutinaria.

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This report presents two cases of patients with long-standing, treatment-resistant Hailey-Hailey disease (HHD) who experienced significant symptom relief through a combination therapy of oral naltrexone and dupilumab injections. The therapeutic potential of targeting the Th2 pathway and Ca2+ signaling with dupilumab in managing HHD manifestations is highlighted. The findings suggest that Th2 blockade with dupilumab, in conjunction with naltrexone, effectively controls recalcitrant HHD, indicating a role of cytokine response in altering disease pathogenesis. This case contributes to the growing body of literature on biologic treatments for HHD and suggests avenues for further research in HHD management.

Hailey-Hailey disease (HHD), or familial benign pemphigus, is a rare genetic condition characterized by recurrent blisters and erosions with a predilection for intertriginous areas. There is no specific treatment for HHD. Topical and systemic treatments tend to provide temporary remission. Alternative treatment (surgical interventions such as dermabrasion, excision, and laser) has been shown to prolong remission. Considering the risk of complications associated with surgical modalities, laser is often preferred as an alternative for patients failing to respond to first-line therapies. We report a case of recalcitrant HHD successfully treated with a fractional ablative CO2 laser procedure (wavelength of 10600 nm, power of 7-10 W, 2-3 passes) on a 35-year-old female. The patient has a 7-year history of therapy-resistant HHD. A 2-month followup showed substantially resolved lesions, with mild erythema and post-inflammatory hyperpigmentation in treated areas.

BACKGROUND: Hailey-Hailey disease (HHD) and Darier disease (DD) are rare genetic disorders for which differential diagnosis, especially in less obvious cases, can be difficult. The diagnosis is based on the clinical picture and family history, and is confirmed by histopathologic examination. Dermoscopy is a noninvasive technique that is primarily used at the present time to diagnose skin cancers. However, in the past few years this technique has also been increasingly used as a noninvasive diagnostic tool of inflammatory skin diseases. The aim of the study was to evaluate whether dermoscopy is a useful noninvasive diagnostic tool for HHD and DD.
METHODS: We performed an observational retrospective case series study involving 13 patients with HHD (n = 8) and DD (n = 5). The presence or absence of standardized dermoscopic features of inflammatory diseases (according to International Dermoscopy Society [IDS] guidelines) was assessed in these patients.
RESULTS: The most distinctive feature of HHD was white clouds separated by pink furrows, visible in all cases (8/8; 100.0%). Another distinctive clue of HHD was the crumbled fabric pattern seen in six patients with HHD (6/8; 75.0%). These dermoscopic findings were not present in patients with DD. The most typical features of DD in the dermoscopic examination was star-like or oval-shaped yellow areas surrounded by whitish halo, visible in all patients (5/5; 100.0%). Another distinctive dermoscopic clue of DD was pinkish homogeneous structureless background, which was present in all patients (5/5, 100.0%). These latter two features were not observed in patients with HHD.
CONCLUSIONS: Dermoscopy reveals distinctive features of HHD and DD, respectively. Therefore, we conclude that dermoscopy can be an excellent complementary noninvasive tool in the diagnostic process of patients with HHD and DD.
Hailey-Hailey disease and Darier disease are rare genetic disorders, which are diagnosed based on the clinical picture and confirmed with skin biopsy. Dermoscopy is noninvasive diagnostic tool, which enables skin visualization at a 10-fold magnification. Currently, dermoscopy is mainly used to diagnose skin cancers. In the recent years, dermoscopy has been also increasingly used as a noninvasive diagnostic tool of inflammatory skin diseases. The aim of the study was to assess whether demoscopy may be a useful tool in diagnosing Hailey-Hailey disease and Darier disease. The study included thirteen patients: eight with Hailey-Hailey disease and five with Darier disease. The most typical dermoscopic feature of Hailey-Hailey disease was white clouds separated by pink furrows, which were visible in all cases. Another distinctive clue was crumbled fabric pattern seen in 75.0% of patients with Hailey-Hailey disease. These dermoscopic findings were not present in patients with Darier disease. In dermoscopic examination the most typical feature of Darier disease was star-like or oval-shaped yellow areas surrounded by whitish halo, visible in all patients. Also, pinkish homogeneous structureless background was present in all patients with Darier disease. These features were not observed in patients with Hailey-Hailey disease. Dermoscopy reveals characteristic features of Hailey-Hailey disease and Darier disease. Therefore, it can be an excellent complementary tool in the diagnostic process of patients with those diseases.

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Hailey-Hailey disease (HHD) is a rare genetic benign condition resulting in blisters predominantly on the skin folds. The inheritance is autosomal dominant with complete penetrance, but a variable expressivity in affected family members. It can be triggered by a vast variety of factors such as sweating, weight gain, infection, trauma, pregnancy, and ultraviolet radiation, but the major cause of the disease is a mutation in the ATP2C1 gene. The lesions are typically distributed symmetrically within intertriginous regions such as the retroarticular folds, axillae, inguinal, and perianal regions and presents as flaccid vesicles and blisters on erythematous skin, giving rise to erosions, fissures, and vegetations. There is no specific therapy for HHD. The therapeutic approach to HHD involves the control of exacerbating factors, secondary infections, and cutaneous inflammation. Because of the rarity of the disease, evidence of efficacy for topical or systemic therapies is mainly based on small observational studies, case reports, and clinical experience. We present a case of HHD successfully treated by photodynamic therapy (PDT) with a topical liposomal chlorin photosensitizer.

Hailey-Hailey disease (HHD) is a rare autosomal dominantly inherited disorder caused by mutations in the ATP2C1 gene that encodes an adenosine triphosphate (ATP)-powered calcium channel pump. HHD is characterized by impaired epidermal cell-to-cell adhesion and defective keratinocyte growth/differentiation. The mechanism by which mutant ATP2C1 causes HHD is unknown and current treatments for affected individuals do not address the underlying defects and are ineffective. Notch signalling is a direct determinant of keratinocyte growth and differentiation. We found that loss of ATP2C1 leads to impaired Notch1 signalling, thus deregulation of the Notch signalling response is therefore likely to contribute to HHD manifestation. NOTCH1 is a transmembrane receptor and upon ligand binding, the intracellular domain (NICD) translocates to the nucleus activating its target genes. In the context of HHD, we found that loss of ATP2C1 function promotes upregulation of the active NOTCH1 protein (NICD-Val1744). Here, deeply exploring this aspect, we observed that NOTCH1 activation is not associated with the transcriptional enhancement of its targets. Moreover, in agreement with these results, we found a cytoplasmic localization of NICD-Val1744. We have also observed that ATP2C1-loss is associated with the degradation of NICD-Val1744 through the lysosomal/proteasome pathway. These results show that ATP2C1-loss could promote a mechanism by which NOTCH1 is endocytosed and degraded by the cell membrane. The deregulation of this phenomenon, finely regulated in physiological conditions, could in HHD lead to the deregulation of NOTCH1 with alteration of skin homeostasis and disease manifestation.

A healthy 25-year-old primiparous woman had an uncomplicated pregnancy and spontaneous vaginal delivery with mediolateral episiotomy. Twenty-four hours postpartum, she developed increasing perineal pain and swelling. Initial examination showed a localized erythema and tissue oedema at the episiotomy site. The woman was admitted to hospital for management of the infected hematoma at the site of the episiotomy. Thereafter, she was started on intravenous antibiotics, and exploration under anaesthesia was planned. The woman\'s medical condition deteriorated rapidly, and necrotizing fasciitis (NF) was strongly suspected. Therefore, aggressive medical and surgical management was undertaken, including broader-spectrum antibiotics and multiple surgical debridement. A biopsy of the debrided tissue showed acantholysis and dyskeratosis, which are features of Hailey-Hailey disease of the skin (familial benign chronic pemphigus), a rare condition. The woman eventually had a V-Y advancement fascial flap and made a complete recovery. In this case report, the details of the development of NF in a woman who was found to have Hailey-Hailey disease are discussed.

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