European expert consensus statement on the systemic treatment of alopecia areata.

Alopecia areata is an autoimmune form of non-scarring hair loss. It is usually characterized by limited areas of hair loss. However, the disease may progress to complete scalp and body hair loss (alopecia totalis, alopecia universalis). In patients with alopecia areata hair loss significantly impacts the quality of life. Children and adolescents with alopecia areata often experience bullying, including physical aggression. The disease severity evaluation tools used in clinical practice are: the Severity of Alopecia Tool (SALT) score and the Alopecia Areata Scale (AAS). A SALT score equal to or greater than 20 constitutes a commonly accepted indication for systemic therapy in alopecia areata. When using the AAS, moderate to severe alopecia areata should be considered a medical indication for systemic treatment. Currently, the only two EMA-approved medications for alopecia areata are baricitinib (JAK 1/2 inhibitor) for adults and ritlecitinib (JAK 3/TEC inhibitor) for individuals aged 12 and older. Both are EMA-approved for patients with severe alopecia areata. Other systemic medications used off-label in alopecia areata include glucocorticosteroids, cyclosporine, methotrexate and azathioprine. Oral minoxidil is considered an adjuvant therapy with limited data confirming its possible efficacy. This consensus statement is to outline a systemic treatment algorithm for alopecia areata, indications for systemic treatment, available therapeutic options, their efficacy and safety, as well as the duration of the therapy.

Intralesional photodynamic therapy induces apoptosis in basal cell carcinoma and Bowen's disease through caspase 3 and granzyme B.

BACKGROUND: Photodynamic therapy (PDT) is used to treat cutaneous cancers. It may induce cell death through direct and indirect means, including apoptosis, inflammation and certain immune mechanisms, with the depth of penetration as a potential modifying factor. OBJECTIVES: To examine the pathways of apoptosis in the intralesional PDT of basal cell carcinoma (BCC) and intraepidermal squamous cell carcinoma (Bowen's disease). METHODS: Sixteen patients with superficial or nodular BCC and Bowen's disease were treated with intralesional aminolevulinic acid-PDT. Biopsies were taken at baseline and 24 h post-PDT, and sections were examined by immunohistochemistry for the expression of markers of apoptosis, such as caspase 3, involved in the intrinsic apoptotic pathway, granzyme B, a caspase-independent apoptotic mediator, and the proapoptotic markers BAX and BAK. RESULTS: Apoptotic cells stained with TUNEL showed statistically significant staining at 24 h post PDT (p < 0.01 in both BCC and Bowen's lesions). Caspase 3 (p < 0.01 in BCC and p < 0.05 in Bowen's) and granzyme B (p < 0.01 in BCC and p < 0.01 in Bowen's) were significantly increased at 24 h post-PDT. BAX expression was apparently increased compared to baseline in Bowen's lesions at 24 h post-PDT, whereas Bak was upregulated both in BCC and Bowen's disease at baseline and at 24 h post-PDT. CONCLUSION: Intralesional PDT induces apoptosis in BCC and Bowen's disease via common and alternative apoptotic pathways involving granzyme B. Proapoptotic factors Bak in both BCC and Bowen and Bax in Bowen's disease appear to increase by intralesional PDT at 24 h.

Clinical and dermatoscopic predictors of squamous cell carcinoma of the lips: a case-control, multicentric study.

BACKGROUND: Squamous cell carcinoma of the lip accounts for 20% of all oral carcinomas. Its diagnosis may be challenging because it clinically resembles actinic cheilitis and inflammatory lesions of the lips. OBJECTIVES: To determine clinical and dermatoscopic predictors of squamous cell carcinoma of the lip vs. other lip lesions. METHODS: Multicentre retrospective morphological study, including histologically confirmed cases of squamous cell carcinoma of the lip and controls consisting of actinic cheilitis and inflammatory lesions of the lips. Clinical and dermatoscopic images were evaluated for the presence of predefined criteria. Crude and adjusted odds ratios and corresponding 95% confidence intervals were calculated by univariate and multivariate logistic regression respectively. RESULTS: A total of 177 lip lesions were evaluated, 107 (60.5%) were squamous cell carcinomas and 70 (39.5%) were controls. The most frequent dermatoscopic criteria of lip squamous cell carcinoma were scales (100%), white halos (87.3%) and ulceration (79.4%). The majority of squamous cell carcinomas displayed polymorphic vessels (60.8%), with linear (68.6%) and hairpin (67.6%) being the most frequent types. Multivariate logistic regression analysis showed that clinical predictors of lip squamous cell carcinoma were exophytic appearance and clinical hyperkeratosis, with 43-fold and 6-fold higher probability respectively. White clods and ulceration in dermoscopy presented a 6-fold and 4-fold increased risk for squamous cell carcinoma respectively. CONCLUSIONS: A scaly lesion with exophytic growth, dermatoscopically displaying white clods, ulceration and linear and hairpin vessels is very likely a squamous cell carcinoma of the lip.

Improvement in Hidradenitis Suppurativa and quality of life in patients treated with adalimumab: Real-world results from the HARMONY Study.

BACKGROUND: Hidradenitis suppurativa (HS), a chronic, recurrent, debilitating skin disease, is characterized by painful, inflammatory, subcutaneous lesions of the axilla, inguinal and anogenital regions. Overall prevalence of HS is ˜1%, and the impact of disease on patient quality of life (QoL) and healthcare resource utilization (HRU) is high. OBJECTIVES: To estimate the real-world effectiveness of adalimumab (Humira®) treatment in patients with moderate-to-severe HS on disease severity, pain, QoL, work productivity and HRU. METHODS: HARMONY (Effectiveness of Adalimumab in Moderate to Severe HidrAdenitis SuppuRativa Patients - a Multi-cOuNtry studY in Real Life Setting) is a multicentre, postmarketing observational study in adult patients with moderate-to-severe HS. Disease severity and QoL parameters were evaluated using validated measures at 12-week intervals over 52 weeks of treatment. The primary endpoint was the proportion of patients achieving a Hidradenitis Suppurativa Clinical Response (HiSCR: ≥50% reduction in abscess and inflammatory nodule count, with no increase in abscess and draining fistula counts relative to baseline) at 12 weeks. Secondary endpoints were HiSCR at 24, 36 and 52 weeks and changes in QoL parameters and work productivity assessments. Analyses were conducted using as-observed data. RESULTS: The proportion of patients reaching the primary HiSCR endpoint was 70.2% (n = 132/188 enrolled) and remained ≥70% until study completion. There were statistically significant (P < 0.0001) reductions in worst and average skin pain. All of the QoL measures evaluated improved significantly (P < 0.0001) by 12 weeks of adalimumab treatment, as did work productivity assessments (P < 0.05), and there was a ˜50% decrease in HRU between baseline and week 52. Adalimumab was well tolerated. CONCLUSIONS: In this real-world setting, adalimumab treatment of moderate-to-severe HS resulted in decreased disease severity and improvements in QoL and productivity. Response to adalimumab was rapid (within 12 weeks) and sustained (52 weeks). No unexpected safety signals were reported.

Dermatoscopic features of thin (≤2 mm Breslow thickness) vs. thick (>2 mm Breslow thickness) nodular melanoma and predictors of nodular melanoma versus nodular non-melanoma tumours: a multicentric collaborative study by the International Dermoscopy Society.

BACKGROUND: Thin nodular melanoma (NM) often lacks conspicuous melanoma-specific dermatoscopic criteria and escapes clinical detection until it progresses to a thicker and more advanced tumour. OBJECTIVE: To investigate the dermatoscopic morphology of thin (≤2 mm Breslow thickness) vs. thick (>2 mm) NM and to identify dermatoscopic predictors of its differential diagnosis from other nodular tumours. METHODS: Retrospective, morphological case-control study, conducted on behalf of the International Dermoscopy Society. Dermatoscopic images of NM and other nodular tumours from 19 skin cancer centres worldwide were collected and analysed. RESULTS: Overall, 254 tumours were collected (69 NM of Breslow thickness ≤2 mm, 96 NM >2 mm and 89 non-melanoma nodular lesions). Light brown coloration (50.7%) and irregular brown dots/globules (42.0%) were most frequently observed in ≤2 mm NMs. Multivariate analysis revealed that dotted vessels (3.4-fold), white shiny streaks (2.9-fold) and irregular blue structureless area (2.4-fold) were predictors for thinner NM compared to non-melanoma nodular tumours. Overall, irregular blue structureless area (3.4-fold), dotted vessels (4.6-fold) and serpentine vessels (1.9-fold) were predictors of all NM compared to non-melanoma nodular lesions. LIMITATIONS: Absence of a centralized, consensus pathology review and cases selected form tertiary centres maybe not reflecting the broader community. CONCLUSIONS: Our study sheds light into the dermatoscopic morphology of thin NM in comparison to thicker NM and could provide useful clues for its differential diagnosis from other non-melanoma nodular tumours.

Pilonidal sinus disease: an intergluteal localization of hidradenitis suppurativa/acne inversa: a cross-sectional study among 2465 patients.

BACKGROUND: Hidradenitis suppurativa (HS), also referred to as acne inversa, is a debilitating skin disease characterized by inflammatory nodules, chronic abscesses and tunnels (fistulae and sinuses). The association with pilonidal sinus disease (PSD) is frequently reported but not well documented. OBJECTIVES: To determine the prevalence and characteristics of inflammatory skin lesions located in the intergluteal fold (IGF) of patients with HS. METHODS: This was an international multicentre retrospective cross-sectional study based on data collection from a large cohort of patients with HS with and without histopathology. Results From a total of 2465 patients with HS included in the study, 661 (27%) reported lesions in the IGF. These patients were significantly more often smokers and had more severe HS. Of the 238 patients with an available clinical diagnosis, intergluteal-HS (IG-HS) was diagnosed in 52 patients (22%) and PSD was diagnosed in 186 patients (78%). IG-HS was associated with the localization of HS in the proximity of the IGF, including the buttocks, genitals and the anus. There was a possibility of misclassification bias in this study as a clinical/image-based diagnosis or histopathology of the IGF lesions was not always available. CONCLUSIONS: The high prevalence of PSD suggests a strong link between both entities. Therefore, it may be useful to identify common pathophysiological mechanisms and develop common therapeutic strategies. What's already known about this topic? The occurrence of pilonidal sinus disease has not been clearly reported among patients with hidradenitis suppurativa/acne inversa. What does this study add? This is the first study that investigated the prevalence of pilonidal sinus disease among a large cohort of patients and identified the patient characteristics. Risk factors that might help to improve the management of patients were identified.

Patients with Spitz naevi in the Greek population: Epidemiologic, Clinical and Histopathological characteristics.

BACKGROUND: Spitz naevi may present with clinical and histopathological atypical features that do not affect patient prognosis but may become worrisome for patients ≥40 years presenting with newly appearing SN. OBJECTIVE: Patient characteristics and sun behaviour patterns were investigated in correlation with age. SN characteristics and histopathological attributes were also investigated in correlation with age. METHODS: Patients with histopathologically confirmed diagnosis of SN were invited for a clinical examination. Data such as skin type, number of banal/atypical naevi, sun exposure patterns and personal/family history were collected. Histopathology preparations were re-examined by two different histopathologists, and characteristics were collected based on a prespecified checklist. Patients were afterwards followed up every 6 months. RESULTS: A total of 110 patients with SN were identified and assigned to three age groups. The most common area of presentation was the trunk, for the ≥40 years age group, and the limbs for the other age groups. Patients ≥40 years had a higher possibility of presenting with a naevus count ≥50 and at least one atypical naevus compared to the other age groups. Patients ≥40 years presented more commonly with a history of painful sunburn (100%) before the appearance of the SN, used less sunscreen, had higher sun exposure times and more clinical signs of solar skin damage compared to the other age groups. Finally, patients ≥40 years presented more commonly with signs of histopathological atypia such as the presence of mitoses, cellular atypia and prominent nucleolus. CONCLUSION: Patients ≥40 were more likely to report a history of longer sun exposure times, of never using a sunscreen and of having a history of painful sunburn. However, the importance of this observation remains to be elucidated as these patients also presented more commonly with lesions located on non-sun-exposed areas (trunk) and higher naevus/atypical naevus counts.

Comparable profiles of serum histamine and IgG4 levels in allergic beekeepers.

Growing evidence identifies histamine as a key player in allergic responses, but the reports relating serum histamine to tolerance are scarce and inconclusive. This study investigated the relationship of circulating histamine to the tolerant phenotype in allergic beekeepers. The results showed a positive correlation between the serum levels of histamine and specific immunoglobulin G4 (sIgG4) to honeybee venom, but not with total IgE or sIgE. Interestingly, both sIgG4 and histamine levels were negatively correlated with the time since the last bee sting. In contrast to total IgE and sIgE, serum sIgG4 and histamine levels followed comparable patterns, being higher in tolerant/recently stung individuals and lower in the least frequently stung subgroup. The data obtained in this pilot study associated, for the first time, serum histamine levels with allergen tolerance in allergic individuals and provided the lead for further considering the putative immunomodulatory properties of histamine in allergic responses.

Idiopathic guttate hypomelanosis: an electron microscopy study.

BACKGROUND: Few published data, concerning the electron microscopy findings of idiopathic guttate hypomelanosis have been published so far. OBJECTIVES: To reveal the electron microscopic findings of idiopathic guttate hypomelanosis and their aetiopathogenetic associations. METHODS: Punch biopsy specimens from four patients with idiopathic guttate hypomelanosis, after being properly processed, were observed under the electron microscope. RESULTS: In the epidermis, melanocytes and melanosomes were normal in structure. In some areas, there was a reduced uptake of melanosomes by the keratinocytes. In the dermis, fibroblasts were structurally normal. Also, most elastic and collagen fibres were normal, but there were focal elastotic changes. CONCLUSIONS: No significant structural abnormality of the melanocytes was observed, but rather a functional defect in the transfer of melanosomes from the melanocytes to the keratinocytes.