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Background and Objective Dissecting cellulitis of the scalp is a primary scarring alopecia. Isotretinoin is commonly referenced in the literature as a treatment for dissecting cellulitis. The objective of this article was to conduct a review and meta-analysis to assess the efficacy of isotretinoin for treating dissecting cellulitis of the scalp. Methods The following databases were searched for articles prior to 23 June, 2019: PubMed, Embase, Cochrane Central, CINAHL, and Web of Science. Multi-patient studies (more than three) that reported on the administration of isotretinoin for dissecting cellulitis were included. A pooled meta-analysis for improvement of disease burden after isotretinoin administration in patients with dissecting cellulitis of the scalp was performed. A fixed-effects model was used. Results Five articles were ultimately used for the quantitative meta-analysis. The overall efficacy rate of isotretinoin in treating dissecting cellulitis of the scalp was estimated to be 0.9 with a 95% confidence interval (0.81–0.97). The sensitivity analysis suggested that the overall efficacy is still very high, with a range of 0.83–0.94. Recurrence was seen in 24% (6/25) of patients. Common associated diseases amongst patients with dissecting cellulitis of the scalp were acne conglobata 20% (30/151) and hidradenitis suppurativa 19% (11/72). Conclusions Isotretinoin is an effective treatment for improving symptoms of dissecting cellulitis of the scalp. Disease recurrence is a common finding for those who undergo successful treatment.

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Hidradenitis suppurativa (HS) is a chronic inflammatory skin condition associated with significant psychosocial comorbidity. To date, the relationship between HS and sexual dysfunction has not been assessed through meta‐analysis. A systematic review was performed by OVID Medline, EMBASE, Cochrane Central, PsycINFO via EBSCO, Web of Science, and LILACS. Original English language studies assessing HS and sexual function published prior to April 2020 were screened. Scores from the Female Sexual Function Index (FSFI), International Index of Erectile Function (IIEF), Arizona Sexual Experiences Scale (ASEX), Frankfurt Self‐Concept Scale for Sexuality (FKKS SEX), and Dermatology Life Quality Index (DLQI) were analyzed. Sixteen studies met inclusion criteria, and nine were eligible for meta‐analysis. Pooled mean FSFI score for female HS patients met criteria for sexual dysfunction (mean = 20.32, P < 0.001). Females with HS reported worse FSFI scores than controls (pooled mean difference = −5.704, P = 0.003, I2=0). Mean IIEF score among males with HS was 47.96 (P < 0.001). Males with HS also reported worse IIEF scores than controls (pooled mean difference = −18.77, P = 0.00, I2 = 0). Females with HS performed worse on sexual function inventories than males with HS (SMD = −0.72, P = 0.009, I2 = 0). Both male and female HS patients reported significantly more sexual impairment than same‐sex controls. Female HS patients also experience more sexual impairment than males and on average meet criteria for sexual dysfunction (FSFI <26.55). Clinicians should be aware that their patients with HS, especially females, may be suffering from sexual dysfunction and treated them appropriately.

Background Metabolic syndrome (MetS) has been associated with various skin conditions including vitiligo. However, the association between these 2 conditions has yet to be determined by quantitative meta-analysis. Objective The aim of this paper was to determine the association between vitiligo and metabolic syndrome via systematic review and meta-analysis. Methods A systematic literature search of Pubmed, Embase, Cochrane, and Web of Science was performed for all published literature prior to August 16, 2020. Case control and prospective cross-sectional studies analyzing the association between vitiligo and MetS were included in this review. The primary outcome measures include the type of vitiligo, diagnostic criteria for MetS, components of MetS (waist circumference, blood pressure, triglycerides, fasting glycemic index, and high-density lipoprotein cholesterol), low-density lipoprotein cholesterol levels, and BMI. A meta-analysis was performed to evaluate the prevalence and association of MetS in patients with vitiligo. Results A total of 6 studies (n=734 participants) meeting eligibility criteria were included for systematic review and meta-analysis. The pooled prevalence of MetS in patients with vitiligo was (0.296, 95% CI 0.206, 0.386; P<.001). Patients with vitiligo were no more likely to develop MetS compared to control patients (odds ratio 1.66, 95% CI 0.83, 3.33; P=.01). A leave-one-out sensitivity analysis showed a significant association between MetS and vitiligo (P<.001). Significant elevations in fasting glycemic index (mean difference 5.35, 95% CI 2.77, 7.93; P<.001) and diastolic blood pressure (mean difference 1.97, 95% CI 0.02, 3.92; P=.05) were observed in patients with vitiligo compared to control patients. Conclusions The association between vitiligo and metabolic syndrome carries important clinical implications. Dermatologists and other multidisciplinary team members should remain vigilant when treating this patient population in order to prevent serious cardiovascular complications that may arise as a result of metabolic disease.

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