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An 11-year-old female was referred from an outside institution after a diagnostic biopsy and subsequent excision of a progressively enlarging reddish-brown nodule demonstrated features concerning for a balloon cell nevus with severe atypia versus a high-grade melanocytoma. Upon review of the initial biopsy specimen and molecular data, we favored the diagnosis to be consistent with a high-grade melanocytoma with balloon cell changes while considering the possibility of balloon cell melanoma due to concerning histopathologic and genetic abnormalities. In this case study, we discuss critical diagnostic considerations in this rare pediatric case and highlight important pathologic and clinical features of melanocytomas and balloon cell melanoma., (© 2024 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.)

Competing Interests: Conflicts of interest None declared.

Background: Linear IgA bullous dermatosis (LABD) is a rare autoimmune blistering disorder that may be drug-induced or paraneoplastic. We aim to characterize features of LABD and determine differentiating factors among idiopathic, drug-induced, or malignancy-associated diseases., Methods: We conducted a single-center retrospective chart review of adult patients with linear IgA bullous dermatosis at a large tertiary referral center and a literature review of adult linear IgA bullous dermatosis., Results: Eighty-one patients were included in the study. Ten patients (12.3%) had comorbid malignancy and nine (11.1%) had inflammatory bowel disease. Median disease duration was significantly shorter in both drug-induced (1.2 vs. 48.8 months; P < 0.001) and malignancy-associated (1.7 vs. 48.8 months; P < 0.001) LABD compared with idiopathic LABD. Recurrent episodes occurred significantly more often in idiopathic LABD compared to those with drug-induced (76.1 vs. 11.5%; P < 0.001) or malignancy-associated disease (76.1 vs. 33.3%; P = 0.019). Time to diagnosis was significantly shorter in the drug-induced (0.2 vs. 5.4 months; P < 0.001) and malignancy-associated groups (0.7 vs. 5.4 months; P = 0.049) compared with idiopathic; similarly, time to improvement was significantly shorter in both drug-induced (0.4 vs. 3.0 months; P < 0.001) and malignancy-associated disease (1.1 vs. 3.0 months; P = 0.016). Clinical morphology was indistinguishable between groups. Limitations included retrospective data collection, data from tertiary referral centers, and limited racial and ethnic diversity., Conclusion: Screening for underlying malignancy, as well as for a predisposing medication or possibly inflammatory bowel disease, may be advisable in patients with LABD, particularly when it is newly diagnosed., (© 2024 the International Society of Dermatology.)

Linear IgA bullous dermatosis (LABD) is a rare autoimmune blistering disorder impacting children and adults. In this single-center retrospective chart review of pediatric patients with LABD at a large tertiary referral center, we report the unifying and unique clinical features of 10 pediatric patients. Patients typically presented with the "cluster of jewels" sign (n = 6; 60%), mucous membrane involvement (n = 5; 50%) and had a mean disease duration of 38 months; six patients (60%) required inpatient admission for management of their skin disease, including all five patients who had mucous membrane involvement. Our findings suggest that pediatric LABD may be a disease with high morbidity and may be associated with severe complications when mucous membranes are involved., (© 2024 Wiley Periodicals LLC.)

Background: The summarized guidelines update the 2014 recommendations for the management of AD with phototherapy and systemic therapies., Methods: A multidisciplinary workgroup conducted a systematic review and applied the GRADE approach for assessing the certainty of the evidence and formulating and grading recommendations., Results: The workgroup developed 11 recommendations on the management of AD in adults with phototherapy and systemic therapies, including biologics, oral Janus Kinase inhibitors, and other immunomodulatory medications., Conclusions: The evidence supported strong recommendations for the use of dupilumab, tralokinumab, abrocitinib, baricitinib, and upadacitinib and conditional recommendations in favor of using phototherapy, azathioprine, cyclosporine, methotrexate, and mycophenolate, and against the use of systemic corticosteroids., Competing Interests: Conflict of interest The American Academy of Dermatology (AAD) strives to produce clinical guidelines that reflect the best available evidence supplemented with the judgment of expert clinicians. Significant efforts are taken to minimize the potential for conflicts of interest to influence guideline content. The management of conflict of interest for this guideline complies with the Council of Medical Specialty Societies' Code of Interactions with Companies. Funding of guideline production by medical or pharmaceutical entities is prohibited, full disclosure is obtained and evaluated for all guideline contributors throughout the guideline development process, and recusal is used to manage identified relationships. The AAD conflict of interest policy summary may be viewed at www.aad.org., (Copyright © 2023 American Academy of Dermatology, Inc. Published by Elsevier Inc. All rights reserved.)

Background: For people with atopic dermatitis (AD) refractory to topical therapies, treatment with phototherapy and systemic therapies can be considered. Multiple biologic therapies and Janus kinase (JAK)inhibitors have been approved since 2014 to treat AD. These guidelines update the 2014 recommendations for management of AD with phototherapy and systemic therapies., Objective: To provide evidence-based recommendations on the use of phototherapy and systemic therapies for AD in adults., Methods: A multidisciplinary workgroup conducted a systematic review and applied the GRADE approach for assessing the certainty of evidence and formulating and grading recommendations., Results: The workgroup developed 11 recommendations on the management of AD in adults with phototherapy and systemic agents, including biologics, oral JAK inhibitors, and other immunomodulatory medications., Limitations: Most randomized controlled trials of phototherapy and systemic therapies for AD are of short duration with subsequent extension studies, limiting comparative long-term efficacy and safety conclusions., Conclusions: We make strong recommendations for the use of dupilumab, tralokinumab, abrocitinib, baricitinib, and upadacitinib. We make conditional recommendations in favor of using phototherapy, azathioprine, cyclosporine, methotrexate, and mycophenolate, and against the use of systemic corticosteroids., Competing Interests: Conflicts of interest Dr Drucker receives research grants paid to his institution from the National Eczema Association, Eczema Society of Canada, Canadian Dermatology Foundation, Canadian Institutes for Health Research, US National Institutes of Health, and Physician Services Incorporated Foundation. Dr Cohen serves on the board of directors for Timber and Evommune receiving stock options and/or fees; as a consultant for Asana Biosciences, Ferndale Laboratories, Inc, Novartis, Facilitation of International Dermatology Education, Dermavant Sciences, Leo Pharma, Inc, UCB, and Cosmetic Ingredient Review receiving honoraria and/or stock options. Dr Eichenfield serves on the board of directors for Forte Biosciences and Verrica Pharmaceuticals, Inc, receiving honoraria and/or stock options; as an investigator for AbbVie, Arcutis, Dermavant, Galderma Laboratories, Pfizer, and Bausch receiving research grants, fees, and/or honoraria; as a consultant for AbbVie, Almirall, Arcutis, Asana, Dermavant, Eli Lilly, Galderma, Ichnos/Glenmark, Incyte, Janssen, Leo Pharma, Novartis, Ortho Dermatologics, Otsuka, Pfizer, Regeneron, and Sanofi Genzyme, honoraria; as an independent contractor for Elsevier, Inc receiving royalties. Dr Paller serves as a consultant for Abbvie, Abeona, Almirall, Amagma, Anaptysbio, Arena, Bausch, Bristol Myer Squibb, Dermavant, Dermira, Eli Lilly, Exicure, Forte, Leo, Lifemax, Novartis, Phoenix, Pierre Fabre, Pfizer, Rapt, Regeneron, Sanofi, Sol-Gel, UCB, and Venthera receiving honoraria; as an investigator for Anaptysbio, Eli Lilly, Incyte, Janssen, Krystal Bio, Lenus, Regeneron, and UCB receiving no compensation. Dr Schwarzenberger is the founder of Pretel, Inc and serves as a data safety monitoring board member for Pfizer, Inc receiving fees. Dr Sidbury serves as an advisory board member for Pfizer, Inc receiving honoraria; as a principal investigator for Regeneron receiving grants and research funding; as an investigator for Brickell Biotech, Inc, and Galderma USA receiving grants and research funding; as a consultant for Galderma Global and Microes receiving fees or no compensation. Dr Silverberg serves as an advisory board member for BioMX, Boehringer Ingelheim, RAPT Therapeutics, Celgene, Ortho Dermatologics, TARGET Pharma, AFYX Therapeutics, Corrona, Inc, Dermira, Pfizer, Inc, Leo Pharma, Inc, and Menlo Therapeutics receiving honoraria and/or fees; as an investigator for DS Pharma, TARGET Pharma, Kiniksa Pharmaceuticals, Ltd, Menlo Therapeutics, GlaxoSmithKline, AbbVie, Leo Pharma, Inc, and Regeneron receiving research funding, honoraria, or no compensation; as a consultant for AOBiome, Bluefin Biomedicine, Bodewell, BiomX, Inc, Galderma Research & Development, LLC, Arena Pharmaceuticals, Dermavant Sciences, Incyte Corporation, DS Biopharma, Sun Pharmaceutical Industries, Ltd, AnaptysBio, Asana Biosciences, LLC, Pfizer, Inc, Glenmark Generics, Inc, Sanofi, Kiniksa Pharmaceuticals, Ltd, GlaxoSmithKlein, Eli Lilly and Company, AbbVie, Regeneron, and Medimmune receiving honoraria or fees; as a speaker for the Fall Clinical Dermatology Conference, Maui Derm, and Regeneron receiving honoraria or fees. Dr Singh serves as an advisory board member for Incyte receiving honoraria. DR Wu is an author for UpToDate, Inc receiving honoraria. Dr Davis, Dr Alikhan, Dr Bercovitch, Athor Darr, and Dr Frazer-Green have no conflicts of interest to declare., (Copyright © 2023 American Academy of Dermatology, Inc. Published by Elsevier Inc. All rights reserved.)

Pathologists provide valuable input in the dermatological care of pregnant patients in various contexts. This article provides dermatopathology updates on cutaneous changes associated with pregnancy, organized based on the following classification system: physiological skin changes in pregnancy, specific dermatoses of pregnancy, dermatoses modified in pregnancy, and skin neoplasms in pregnancy. Awareness of the impact of pregnancy on the skin by pathologists is important, as this is an opportunity to contribute to diagnostic precision in this patient population., (Copyright © 2023 Elsevier Inc. All rights reserved.)

Background: Follicular mucinosis (FM) is a rare disease characterized by mucin accumulation in the follicular unit. FM's etiology is still widely debated since its first description in 1957. Follicular mucinosis is usually reported to be benign in children, although reports of malignant transformation, most commonly mycosis fungoides, exist. The present project aims to demonstrate that children with a diagnosis of follicular mucinosis have positive long-term outcomes and do not develop mycosis fungoides., Materials and Methods: This is a retrospective cohort study where patients with a diagnosis of follicular mucinosis ages 22 years and below were identified. Data surrounding the patient's diagnosis of FM, differential diagnosis, treatments, and long-term outcomes were collected. Patients who were lost to follow-up were contacted by phone for an update on the status of their skin and overall health., Results: Out of 14 patients with follow-up information, none developed subsequent mycosis fungoides or other hematologic malignancies., Conclusion: Pediatric patients with follicular mucinosis will likely present with limited disease and not experience malignant transformation., (© 2023 the International Society of Dermatology.)

Background: New evidence has emerged since the 2014 guidelines that further informs the management of atopic dermatitis (AD) with topical therapies. These guidelines update the 2014 recommendations for management of AD with topical therapies., Objective: To provide evidence-based recommendations related to management of AD in adults using topical treatments., Methods: A multidisciplinary workgroup conducted a systematic review and applied the GRADE (Grading of Recommendations, Assessment, Development, and Evaluations) approach for assessing the certainty of evidence and formulating and grading recommendations., Results: The workgroup developed 12 recommendations on the management of AD in adults with topical therapies, including nonprescription agents and prescription topical corticosteroids (TCS), calcineurin inhibitors (TCIs), Janus kinase (JAK) inhibitors, phosphodiesterase-4 inhibitors (PDE-4), antimicrobials, and antihistamines., Limitations: The pragmatic decision to limit the literature review to English-language randomized trials may have excluded data published in other languages and relevant long-term follow-up data., Conclusions: Strong recommendations are made for the use of moisturizers, TCIs, TCS, and topical PDE-4 and JAK inhibitors. Conditional recommendations are made for the use of bathing and wet wrap therapy and against the use of topical antimicrobials, antiseptics, and antihistamines., Competing Interests: Conflicts of interest David E. Cohen∗, MD, MPH serves on the board of directors for Timber and Evommune receiving stock options and/or fees and as a consultant for Asana Biosciences, Ferndale Laboratories, Inc, Novartis, Facilitation of International Dermatology Education, Dermavant Sciences, Leo Pharma, Inc, UCB, and Cosmetic Ingredient Review receiving honoraria and/or stock options. Lawrence F. Eichenfield∗, MD serves on the board of directors for Forte Biosciences and Verrica Pharmaceuticals, Inc, receiving honoraria and/or stock options; as an investigator for Abbvie, Arcutis, Dermavant, Galderma Laboratories, Pfizer, and Bausch, receiving research grants, fees, and/or honoraria; as a consultant for Abbvie, Almirall, Arcutis, Asana, Dermavant, Eli Lilly, Galderma, Ichnos/Glenmark, Incyte, Janssen, Leo Pharma, Novartis, Ortho Dermatologics, Otsuka, Pfizer, Regeneron, and Sanofi Genzyme, honoraria; and as an independent contractor for Elsevier, Inc receiving royalties. Amy S. Paller∗, MD serves as a consultant for Abbvie, Abeona, Almirall, Amagma, Anaptysbio, Arena, Bausch, Bristol Myer Squibb, Dermavant, Dermira, Eli Lilly, Exicure, Forte, Leo, Lifemax, Novartis, Phoenix, Pierre Fabre, Pfizer, Rapt, Regeneron, Sanofi, Sol-Gel, UCB, and Venthera receiving honoraria; and as an investigator for Anaptysbio, Eli Lilly, Incyte, Janssen, Krystal Bio, Lenus, Regeneron, and UCB receiving no compensation. Kathryn Schwarzenberger, MD is the founder of Pretel, Inc and serves as a data safety monitoring board member for Pfizer, Inc receiving fees. Robert Sidbury∗, MD serves as an advisory board member for Pfizer, Inc receiving honoraria; as a principal investigator for Regeneron receiving grants and research funding; as an investigator for Brickell Biotech, Inc, and Galderma USA receiving grants and research funding; and as a consultant for Galderma Global and Microes receiving fees or no compensation. Jonathan I. Silverberg∗, MD, PhD, MPH serves as an advisory board memberfor BioMX, Boehringer Ingelheim, RAPT Therapeutics, Celgene, Ortho Dermatologics, TARGET Pharma, AFYX Therapeutics, Corrona, Inc, Dermira, Pfizer, Inc, Leo Pharma, Inc, and Menlo Therapeutics receiving honoraria and/or fees; as an investigator for DS Pharma, TARGET Pharma, Kiniksa Pharmaceuticals, Ltd, Menlo Therapeutics, GlaxoSmithKline, AbbVie, Leo Pharma, Inc, and Regeneron receiving research funding, honoraria, or no compensation; as a consultant for AOBiome, Bluefin Biomedicine, Bodewell, BiomX, Inc, Galderma Research & Development, LLC., Arena Pharmaceuticals, Dermavant Sciences, Incyte Corporation, DS Biopharma, Sun Pharmaceutical Industries, Ltd, AnaptysBio, Asana Biosciences, LLC., Pfizer, Inc, Glenmark Generics, Inc, Sanofi, Kiniksa Pharmaceuticals, Ltd, GlaxoSmithKlein, Eli Lilly and Company, AbbVie, Regeneron, and Medimmune receiving honoraria or fees; and as a speaker for the Fall Clinical Dermatology Conference, Maui Derm, and Regeneron receiving honoraria or fees. Anne Marie Singh, MD as a consultant for Abbvie. Peggy Wu, MD serves as an author for UpToDate, Inc receiving honoraria. Drs. Alikhan, Bercovitch, Davis, and Frazer-Green, and Jennifer M. Darr, LCSW have no relationships to disclose., (Copyright © 2023 American Academy of Dermatology, Inc. Published by Elsevier Inc. All rights reserved.)

These guidelines update the 2014 recommendations for management of atopic dermatitis in adults with topical therapies. A multidisciplinary workgroup employed best practices for guideline development, including a systematic review of the evidence and application of the Grading of Recommendations, Assessment, Development, and Evaluation approach for assessing the certainty of the evidence and formulating and grading recommendations. The evidence on atopic dermatitis treatment supported strong recommendations for the use of nonprescription moisturizers, topical calcineurin inhibitors, topical corticosteroids, and topical PDE-4 and JAK inhibitors. Conditional recommendations are made for the use of bathing and wet wrap therapy and against the use of topical antimicrobials, antiseptics, and antihistamines., Competing Interests: Conflict of Interest The American Academy of Dermatology (AAD) strives to produce clinical guidelines that reflect the best available evidence supplemented with the judgment of expert clinicians. Significant efforts are taken to minimize the potential for conflicts of interest to influence guideline content. The management of conflict of interest for this guideline complies with the Council of Medical Specialty Societies' Code of Interactions with Companies. Funding of guideline production by medical or pharmaceutical entities is prohibited, full disclosure is obtained and evaluated for all guideline contributors throughout the guideline development process, and recusal is used to manage identified relationships. The AAD conflict of interest policy summary may be viewed at www.aad.org., (Copyright © 2023 American Academy of Dermatology, Inc. Published by Elsevier Inc. All rights reserved.)

Background: Pemphigoid gestationis (PG) and polymorphic eruption of pregnancy (PEP) may be similar morphologically but confer different maternal and fetal risks. Direct immunofluorescence is the gold standard test used to differentiate between the 2 diagnoses but is not always available., Objective: To develop and validate a clinical scoring system to differentiate PG from PEP., Methods: After developing a scoring system based on differentiating clinical factors reported in existing literature, we tested its diagnostic accuracy in a retrospective international multicenter validation study in collaboration with the European Academy of Dermatology and Venereology's Skin Diseases in Pregnancy Taskforce., Results: Nineteen pregnancies (16 patients) affected by PG and 39 pregnancies (39 patients) affected by PEP met inclusion criteria. PG had a mean score of 4.6 (SD, 2.5) and PEP had a mean score of -0.3 (SD, 2.0). The area under the curve was 0.93 (95% CI, 0.86-1.00). Univariate analysis revealed that almost all criteria used in the scoring system were significantly different between the groups (P < .05), except for skip pregnancy and multiple gestations, which were then removed from the final scoring system., Limitations: Small retrospective study., Conclusion: The Pregnancy Dermatoses Clinical Scoring System may be useful to differentiate PG from PEP in resource-limited settings., Competing Interests: Conflicts of interest Dr Murase has served as an advisor for LeoPharma, Sanofi-Genzyme, Eli Lilly, Regeneron, and UCB and has given disease-state nonbranded talks for Regeneron and UCB. Dr Maul is an employee of USZ and has served as an advisor and/or received speaking fees and/or participated in clinical trials sponsored by AbbVie, Almirall, Amgen, BMS, Celgene, Eli Lilly, LEO Pharma, Janssen-Cilag, MSD, Novartis, Pfizer, Pierre Fabre, Roche, Sanofi, UCB. Dr Lehman has served on the advisory board of Argenx. Other authors have no conflicts of interest to declare., (Copyright © 2023 American Academy of Dermatology, Inc. Published by Elsevier Inc. All rights reserved.)

Background/objectives: Pediatric lichen planus (LP) is rare with variable prevalence and atypical presentations compared to adults. Data on LP are lacking for the pediatric population in the United States. We present demographics, presentations, and treatments for a pediatric LP cohort., Methods: We reviewed 26 patients diagnosed with LP at 20 years or younger. Treatment responses were defined as no response, partial response, and complete response., Results: Demographics included 54% females and median diagnosis age of 16 years (range 6-20). Most patients presented with cutaneous LP (65%), with fewer having associated oral (23%), nail (7.7%), or genital (3.8%) involvement. Some had cutaneous-only LP (38%) or strictly mucosal LP (oral-only 19% and genital-only 15%). LP lesions were pruritic (50%), painful (19%), and/or asymptomatic (35%). Complete/partial responses occurred with medium-potency topical corticosteroids in cutaneous (n = 7; 64%), oral (n = 3; 75%), and genital LP (n = 3; 100%), with high/ultra-high potency topical corticosteroids in oral LP (n = 6; 86%), and with topical calcineurin inhibitors in genital LP (n = 2; 100%). Side effects were clobetasol-related oral candidiasis and biopsy-related penile depressed scar. Most patients with available follow-up achieved remission (n = 17; 81%)., Conclusions: Pediatric LP usually presents in adolescence with cutaneous involvement and is symptomatic. However, patients frequently can have oral, genital, or nail lesions or may be asymptomatic, so they need thorough examinations and follow-up. Long-term remission is common due to treatment or natural disease course. Medium-potency corticosteroids are recommended for cutaneous, oral, and genital LP. Various other local and systemic therapies exist with successful treatment responses., (© 2022 Wiley Periodicals LLC.)

Background/objectives: Basal cell nevus syndrome (BCNS) is an autosomal dominant skin cancer predisposition syndrome associated with abnormal mineral metabolism, a risk factor for urinary stone disease (USD). However, no research investigating the association between BCNS and USD or other manifestations of abnormal mineral metabolism has been conducted. The objective of this study is to investigate the association between BCNS and conditions associated with disordered mineral metabolism including USD, hypothyroidism, and osteoporosis and compare them to prevalence in the general population to elucidate potential unknown manifestations of the condition., Methods: This retrospective study examined medical records of adult and pediatric patients with confirmed BCNS from the Mayo Clinic database from 1 January 1995 to 12 January 2020. Records were surveyed for evidence of USD and other comorbidities potentially related to BCNS. The studied cohort included 100 adult patients and 5 pediatric patients., Results: A total of 105 patients were included in this analysis, 10 of whom experienced confirmed USD, representing a prevalence of 10%. Six adult patients were identified with a diagnosis of osteoporosis, representing a prevalence of 6%. Thirteen adult patients were identified with a diagnosis of hypothyroidism, representing a prevalence of 13%., Conclusions: This study identified a prevalence of USD in BCNS patients comparable to estimates of national prevalence, indicating that known abnormalities in mineral metabolism likely do not increase the incidence of USD in BCNS patients. Additional findings included increased prevalence of hypothyroidism and decreased prevalence of osteoporosis in the BCNS cohort compared to national averages., (© 2022 Wiley Periodicals LLC.)

Competing Interests: Conflicts of interest None disclosed.

Autoimmune progesterone dermatitis (APD) is a rare hypersensitivity disorder characterized by recurring dermatologic manifestations during the luteal phase of the menstrual cycle in women. Well-defined clinical and diagnostic criteria, outcomes measurements, and standard treatments are lacking., Methods: We performed a single-institution retrospective review of adult patients (older than 20 years at the time of diagnosis) with APD., Results: Fourteen patients were included with mean age of clinical onset of 34.3 ± 7.7 (range 24-54) years. There was a delay of 3.9 ± 5.5 (range 0.4-20) years between the onset of disease symptoms and diagnosis. The onset of APD was after exposure to exogenous progesterone in 9 of 14 patients. Progesterone skin test was performed in 9 patients and 6 were positive. Patients frequently presented with urticaria (9/14, 64.3%) and dermatitis (4/14, 28.6%). Continuous combined oral contraceptives (4/14, 28.6%), gonadotropin-releasing hormone agonist (3/14, 21.4%), and hysterectomy with bilateral salpingo-oophorectomy (2/14, 14.3%) were the most common attempted treatments with reliable outcomes., Conclusions: APD is a rare disorder which lacks universal diagnostic measures and criteria, contributing to a significant delay in diagnosis. Large-scale multicenter studies are needed to develop accurate tests, establish diagnostic criteria, and define treatment outcomes., Competing Interests: None., (Copyright © 2022 The Authors. Published by Wolters Kluwer Health, Inc. on behalf of Women’s Dermatologic Society.)

Background: Studies found associations between atopic dermatitis (AD) and various comorbidities., Objective: To appraise evidence of the association between AD and comorbidities among adults., Methods: Our multidisciplinary work group conducted a systematic review of the association between AD and selected comorbidities. We applied the Grading of Recommendations, Assessment, Development, and Evaluation for prognosis approach for assessing the certainty of the evidence, providing statements of association based on the available evidence., Results: Analysis of the evidence resulted in 32 statements. Clear evidence of the association of AD in adults and select allergic, atopic, immune-mediated mental health and bone health conditions and skin infections was identified. There is some evidence supporting an association between AD and substance use, attention deficit hyperactivity disorder, and elements of metabolic syndrome. Evidence suggests a small association with various cardiovascular conditions. The association between AD in adults and autism spectrum disorders, myocardial infarction, stroke, and metabolic syndrome is inconclusive., Limitations: This analysis is based on the best available evidence at the time it was conducted. This guideline does not make recommendations for screening or management of comorbidities in adults with AD., Conclusions: Clinicians should be aware of comorbidities associated with AD. Further research is needed to determine whether screening or management of comorbidities is beneficial for adults with AD., (Copyright © 2022 American Academy of Dermatology, Inc. Published by Elsevier Inc. All rights reserved.)

The aim of this study is to report our institution's experience with pediatric skin malignancies. A single institution retrospective review of pediatric patients with a primary skin malignancy from 1992 to 2020 was performed. Demographics, tumor characteristics and treatment outcomes were reviewed. Ninety-nine patients with 109 primary malignant skin lesions were reviewed. The most common lesion was malignant melanoma [MM] ( n  = 50, 45.9%). Compared to non-melanoma skin cancer (NMSC), MM were more likely to present on trunk or extremities ( p =.01, OR = 3.2), and be misdiagnosed ( p =.03, OR = 2.7). NMSC were more common in the head and neck region ( p =.01, OR = 3.2), and were associated with a personal history of skin cancer ( p =.0005, OR = 17.1) or a known risk factor ( p =.04, OR = 2.5). Patients with MM were 12.4-times more likely to develop metastatic disease compared to NMSC ( p <.0001). Increased Breslow's thickness also increased the odds of developing metastatic disease ( p =.03, OR = 1.6 per 1-mm increase). Interval time between lesion recognition and diagnostic biopsy or surgical treatment did not impact overall survival. Malignant melanoma was the most common malignancy in our cohort, followed by basal cell carcinoma. Malignant melanoma was the most likely tumor to be misdiagnosed and/or metastasize. Treatment delays did not impact risk of metastasis, recurrence or survival rate, though some patients succumbed to disease. These results may be attributed to small sample size or the biology of melanoma in pediatric patients. Awareness of skin malignancies in the pediatric population is imperative to providers and the public, with low threshold for specialty consultation and excision when warranted.

Competing Interests: AUTHOR DISCLOSURE Drs Quddusi, Youssef, and Davis have no financial relationships relevant to this article. This commentary does not contain a discussion of an unapproved/investigative use of a commercial product/device.

Background/objective: Current knowledge about usage of effective, but non-first-line topical acne medications in the United States is limited. We aimed to investigate utilization patterns and temporal trends for such acne medications in the US ambulatory care., Methods: Pediatric (≤18 years old) and adult (>18 years old) data from the 2012 to 2016 (inclusive) cycles of the US National Ambulatory Medical Care Survey were extracted. Utilization patterns of six non-first-line topical acne medications (ie, azelaic acid, salicylic acid, glycolic acid, sulfur, resorcinol, and zinc) were compared and followed over time., Results: Data from 218 410 US office-based sampled visits during 2012-2016 were included in the analysis. Across all acne visits (n = 1542), salicylic acid (1.58%), azelaic acid (1.22%), and glycolic acid (0.52%) were the most frequently used agents, while zinc and resorcinol were not used. Sulfur (0.52%) and salicylic acid (0.33%) were the only medications used in preadolescents, and none of these medications were used in the neonatal or infantile group. Temporal trends for using at least one of these medications were insignificant among both pediatric and adult age groups (P = .825 and .136, respectively)., Conclusions: Salicylic acid and azelaic acid are the most frequently used of the studied second-line medications to treat acne, although the use of these and the other non-first-line topical medications overall is uncommon, especially among younger groups of US pediatric patients., (© 2021 Wiley Periodicals LLC.)

Background/objective: Autoimmune progesterone dermatitis (APD) is a rare autoimmune hypersensitivity reaction that occurs cyclically at the peak of endogenous progesterone production during the menstrual cycle in women. No study characterizing APD in the adolescent population is found; it appears likely to be underdiagnosed and undertreated., Methods: A retrospective, single-center, review of all adolescent and pediatric patients (<20 years old at onset) with documented diagnosis of APD., Results: Seventeen adolescent APD patients were included (mean age at diagnosis: 14.4 ± 2 years, mean interval of 13.6 ± 11.1 months between symptom onset and diagnosis). Twelve patients presented with urticaria, two with fixed drug eruption. Erythema multiforme, eczema, and recurrent aphthous stomatitis were present in one patient each. Exposure to exogenous progestin was present in two patients prior to disease onset. Progesterone skin test was performed in six patients with positive results in two. Fourteen patients received antihistamines and/or a topical corticosteroid. Combined oral contraceptives (COCs) were given to eleven patients, in seven via continuous daily dosing. Gonadotropin-releasing hormone agonist (GnRHa) was used in five, progesterone desensitization in four, omalizumab in two, and danazol in one patient., Conclusions: Adolescent APD is associated with a significant delay in diagnosis. The most common manifestation is urticaria. Exogenous exposure to progestins is uncommon in adolescent APD. Continuous COC, GnRHa, and progesterone desensitization have been used to control symptoms. Large, multicenter studies are required to better define, diagnose, and treat this under recognized condition among adolescent patients., (© 2020 Wiley Periodicals LLC.)

Psoriasis is a chronic, inflammatory, multisystem disease that affects up to 3.2% of the United States population. This guideline addresses important clinical questions that arise in psoriasis management and care and provides recommendations based on the available evidence. The treatment of psoriasis with topical agents and with alternative medicine will be reviewed, emphasizing treatment recommendations and the role of dermatologists in monitoring and educating patients regarding benefits as well as risks that may be associated. This guideline will also address the severity assessment methods of psoriasis in adults., (Copyright © 2020 American Academy of Dermatology, Inc. All rights reserved.)

Background/objectives: To determine the role of sex in port-wine stain (PWS) distribution and describe the epidemiologic and anatomic differences between syndrome-associated and non-syndrome-associated PWS using modern criteria., Methods: A retrospective review of PWS patients aged 18 years and younger from 1995 to 2018 seen in the Department of Dermatology at an academic tertiary referral center. Cases were reviewed for sex, anatomic location, and presence of associated syndrome. 4,527 records were reviewed on the basis of ICD billing codes for congenital vascular malformations, with 516 meeting inclusion criteria., Results: 516 patients were included in the analysis: 234 (45.4%) men and 282 (54.6%) women. A female preponderance of Sturge-Weber syndrome (18 of 23, 78%, P = .03) and a trend toward more female-isolated PWS (149 of 269, 55%, P = .72) were found. No lateral predominance observed for isolated PWS was found: 112(41.6%) limited left-side lesions and 113(42%) limited right-side lesions (P = .41). A trend toward Klippel-Trenaunay syndrome (KTS)-associated PWS occurring more commonly isolated to the left side (76 (45.5%) vs 59 (35.12%) P = .29) was found. Nine percent of SWS patients had a PWS on the body. Five percent of KTS patients had a facial PWS. The lower limb was the most common location overall of body PWS with 33.8% of isolated PWS and 81.5% of KTS patients having a lower limb lesion., Conclusions: Female children were more likely to be diagnosed with SWS, and a trend toward more isolated PWS in women was found. No lateral predominance of isolated PWS was found, but KTS-associated PWS was more common on the left. A considerable proportion of lesions do not appear in anatomic locations traditionally considered typical in the setting of associated syndromes, which underscores the importance of conducting a complete physical examination and adhering to diagnostic criteria for those syndromes., (© 2020 Wiley Periodicals LLC.)

Background/objectives: Studies assessing the utility of spironolactone for treating acne in adolescent females are lacking. Thus, we sought to examine spironolactone's role in treating this patient population., Methods: A retrospective review was performed to determine the efficacy of spironolactone treatment in adolescent females seen at Mayo Clinic in Rochester, Minnesota, from 2007 to 2017., Results: In a cohort of 80 pediatric patients with a median age of 19 years (range, 14-20 years), 64 patients (80%) experienced improvement of acne on treatment with spironolactone (median dose, 100 mg daily) with a favorable side effect profile. Approximately a quarter of patients (22.5%) had a complete response; more than half (58.8%) had a complete response or a partial response greater than 50%. Initial and maximal responses were observed at a median of 3 months and 5 months, respectively. Patients received treatment with spironolactone for a median duration of 7 months (range, 3-45 months) with limited side effects., Conclusions: Spironolactone demonstrated efficacy in treating acne in adolescent females and is a safe long-term alternative to systemic antibiotics in these patients., (© 2020 Wiley Periodicals LLC.)

Competing Interests: AUTHOR DISCLOSUREMr Imhof and Drs Davis and Tollefson have disclosed no financial relationships relevant to this article. This commentary does not contain a discussion of an unapproved/investigative use of a commercial product/device.

Background: Drug reaction with eosinophilia and systemic symptoms (DRESS) is a drug-induced hypersensitivity reaction that can have fatal complications. Although substantial data exist regarding DRESS in adults, to our knowledge, a systematic review of available literature has not been performed in children., Objective: To review available data on DRESS in the pediatric population., Methods: A systematic literature review was performed for pediatric (aged <18 years) patients with DRESS., Results: We included 82 articles with 148 patients; of these, 97.9% experienced a skin rash, and the liver was the second most common organ involved (84.5%). Among 143 patients for which a treatment regimen was reported, 85.3% were treated with systemic steroids. Intravenous immunoglobulin alone failed to improve symptoms in 5 patients who were initially misdiagnosed, whereas those treated with intravenous immunoglobulin and steroids (2.7%) showed rapid clinical improvement. The mortality rate was low (3.0%). Complications included multiorgan failure and acute respiratory distress syndrome., Limitations: Limitations included limited availability of data for statistical analysis., Conclusion: Pediatric DRESS commonly involves the liver. With treatment, the prognosis is commonly good, but serious complications may occur. Corticosteroids, possibly in conjunction with intravenous immunoglobulin in severe cases, may serve as an effective, valuable treatment of pediatric DRESS., (Copyright © 2020 American Academy of Dermatology, Inc. Published by Elsevier Inc. All rights reserved.)

Psoriasis is a chronic inflammatory disease involving multiple organ systems and affecting approximately 2% of the world's population. In this guideline, we focus the discussion on systemic, nonbiologic medications for the treatment of this disease. We provide detailed discussion of efficacy and safety for the most commonly used medications, including methotrexate, cyclosporine, and acitretin, and provide recommendations to assist prescribers in initiating and managing patients on these treatments. Additionally, we discuss newer therapies, including tofacitinib and apremilast, and briefly touch on a number of other medications, including fumaric acid esters (used outside the United States) and therapies that are no longer widely used for the treatment of psoriasis (ie, hydroxyurea, leflunomide, mycophenolate mofetil, thioguanine, and tacrolimus)., (Copyright © 2020 American Academy of Dermatology, Inc. All rights reserved.)

A 15-year-old boy presented with painful ulcerations affecting the oral mucosa that were eventually attributed to marijuana vaping. In this case report, we highlight cannabis vaping as a potential cause of oral erosions due to injury and chronic inflammation of the oral mucosa., (© 2020 Wiley Periodicals, Inc.)

Psoriasis is a chronic, multisystem, inflammatory disease that affects approximately 1% of children, with onset most common during adolescence. This guideline addresses important clinical questions that arise in psoriasis management and provides evidence-based recommendations. Attention will be given to pediatric patients with psoriasis, recognizing the unique physiology, pharmacokinetics, and patient-parent-provider interactions of patients younger than 18 years old. The topics reviewed here mirror those discussed in the adult guideline sections, excluding those topics that are irrelevant to, or lack sufficient information for, pediatric patients., (Copyright © 2019 American Academy of Dermatology, Inc. All rights reserved.)

Psoriasis is a chronic inflammatory disease involving multiple organ systems and affecting approximately 3.2% of the world's population. In this section of the guidelines of care for psoriasis, we will focus the discussion on ultraviolet (UV) light-based therapies, which include narrowband and broadband UVB, UVA in conjunction with photosensitizing agents, targeted UVB treatments such as with an excimer laser, and several other modalities and variations of these core phototherapies, including newer applications of pulsed dye lasers, intense pulse light, and light-emitting electrodes. We will provide an in-depth, evidence-based discussion of efficacy and safety for each treatment modality and provide recommendations and guidance for the use of these therapies alone or in conjunction with other topical and/or systemic psoriasis treatments., (Copyright © 2019 American Academy of Dermatology, Inc. All rights reserved.)

Psoriasis is a chronic, inflammatory multisystem disease that affects up to 3.2% of the US population. This guideline addresses important clinical questions that arise in psoriasis management and care, providing recommendations based on the available evidence. The treatment of psoriasis with biologic agents will be reviewed, emphasizing treatment recommendations and the role of the dermatologist in monitoring and educating patients regarding benefits as well as associated risks., (Copyright © 2018 American Academy of Dermatology, Inc. All rights reserved.)

Psoriasis is a chronic, inflammatory, multisystem disease that affects up to 3.2% of the US population. This guideline addresses important clinical questions that arise in psoriasis management and care, providing recommendations on the basis of available evidence., (Copyright © 2018 American Academy of Dermatology, Inc. All rights reserved.)

Background/objectives: Specific maternal risk factors have recently been identified in the development of infantile hemangiomas (IH), including gestational diabetes (GDM), maternal antihypertensive medication use or gestational hypertension (GHTN), maternal progesterone use, and artificial reproductive technologies (ART). We sought to explore the change in incidence of these risk factors over time and determine their association with the increased incidence of hemangiomas over 35 years, as previously reported., Methods: The charts of 869 mother and infant pairs (infants previously diagnosed with IH between January 1, 1976, and December 31, 2010) were reviewed for prenatal complications. Rates of the prenatal complications over the 35-year period in birth mothers of infants diagnosed with IH were determined and evaluated by year of diagnosis (1976-1990, 1991-2000, and 2001-2010)., Results: Over the 35-year period in which the incidence of IH was previously examined, maternal age at delivery, prepregnancy body mass index (BMI), use of ART, maternal progesterone use, placental abnormalities, and GDM also increased., Conclusions: GDM, ART, and maternal progesterone use increased over the past 35 years, mirroring the previously reported trend of increasing incidence of IH. Maternal age and BMI also increased in mothers of infants with IH. Further exploration of this association may direct future research in the pathogenesis of infantile hemangiomas., (© 2018 Wiley Periodicals, Inc.)

Background: Conflicting data have been published on whether an association exists between atopic dermatitis (AD) and nonmelanoma skin cancer. This study aimed to determine whether individuals with AD had an increased risk of squamous cell carcinoma (SCC) development., Methods: We conducted a retrospective, case-control study of patients residing in Olmsted County, Minnesota. Cases were selected from patients seen at Mayo Clinic (Rochester, Minnesota) who had an initial SCC diagnosis (either invasive SCC or SCC in situ) from January 1, 1996, through December 23, 2010. Age- and sex-matched controls were selected from patients seen at Mayo Clinic with no history of SCC before the case event date., Results: Three hundred ninety-nine individuals with a documented history of SCC were identified and matched with 780 controls who did not have a history of SCC. After adjusting for race, smoking history, ionizing radiation exposure, corticosteroid and cyclosporine use, and non-SCC skin cancers, the odds ratio for SCC development between patients with history of AD versus patients without history of AD was 1.75 (95% CI, 1.05-2.93)., Conclusions: Our findings support an increased risk of SCC development in the setting of AD., (© 2017 The International Society of Dermatology.)

Linear morphea of the limb primarily affects children, and extracutaneous manifestations are common. Orthopedic surgeons are often essential in the care of patients with linear morphea, yet there are few reports outlining specific orthopedic complications in this population. We sought to improve the understanding of orthopedic complications in linear morphea of the limb. Between 1999 and 2014, 51 children were evaluated for linear morphea of an extremity. Twenty-six (51%) had documented orthopedic manifestations. Outcome measures included limb length discrepancy, angular malalignment, limb atrophy, and orthopedic surgical intervention. Joint contractures were most common, affecting 88% of patients, followed by limb atrophy, angular deformity, and limb length discrepancy; 14% required surgical intervention. Despite the use of systemic immunosuppressive therapy in many patients, approximately half of patients with linear morphea of an extremity have orthopedic disease. Early orthopedist involvement is crucial to improve limb alignment and preserve function., (© 2017 Wiley Periodicals, Inc.)

Background: Previous studies have found increased rates of musculoskeletal problems in adults with allergic disease, but whether this association holds true for children is unknown., Objective: To investigate the association of bone, joint, and muscle problems in children with a history of allergic disease., Methods: Data were obtained from the 2007 Child and Adolescent Health Measurement Initiative. Univariable and multivariable logistic regression models accounting for the sampling design were used to evaluate associations of bone, joint, and muscle problems with allergic diseases, such as asthma, hay fever, food allergies, and eczema. Associations were summarized with odds ratios (ORs) and 95% confidence intervals (CIs)., Results: The survey included 91,642 individuals aged 0 to 17 years. Multivariable modeling found statistically significant associations between the number of allergic diseases and bone, joint, and muscle problems (1 allergic disease: adjusted OR, 1.28; 95% CI, 1.04-1.56; P = .02; 2 allergic diseases: adjusted OR, 2.55; 95% CI, 1.92-3.39; P < .001; 3 allergic diseases: adjusted OR, 2.70; 95% CI, 1.88-3.86; P < .001; and 4 allergic diseases: adjusted OR, 4.35; 95% CI, 2.46-7.69; P < .001). Severe eczema (but not mild eczema) was associated with bone, joint, and muscle problems (adjusted OR, 2.81; 95% CI, 1.64-4.81; P < .001) and with bone problems (adjusted OR, 6.08; 95% CI, 1.94-19.12; P = .002)., Conclusion: Self-reported allergic diseases in children were associated with bone, joint, and muscle problems, and associations strengthened with allergic disease severity and number of allergic diseases. Severe eczema may be associated with bone problems in children. Bone, joint, and muscle problems must be considered in children with severe allergic disease, and prospective studies are necessary to define this association., (Copyright © 2017 American College of Allergy, Asthma & Immunology. Published by Elsevier Inc. All rights reserved.)