Scalp Infection, Inflammation, and Infestation.

Tinea capitis, folliculitis, seborrheic dermatitis, and pediculosis capitis are four common scalp conditions. Although tinea capitis and seborrheic dermatitis are found more commonly in patients with skin of color and highly textured hair, all of these conditions have special diagnostic or management considerations in these populations. This article reviews the diagnosis and management of these common scalp conditions.

Diversity in the Dermatology Workforce and in Academic Medicine.

Health disparities exist in marginalized patient populations throughout medical specialties, including in dermatology. It is important that the physician workforce reflect the diversity of the US population to address these disparities. At present, the dermatology workforce does not reflect the racial or ethnic diversity of the US population. The subspecialties of pediatric dermatology, dermatopathology, and dermatologic surgery are even less diverse than the dermatology workforce as a whole. Although women make up over half of the population of dermatologists, disparities still exists in areas such as compensation and presence in leadership positions.

Impact of considering United States Medical Licensing Examination Step 1 pass/fail on diversity in dermatology residency recruitment.

The University of Chicago dermatology residency program considered the United States Medical Licensing Examination (USMLE) Step 1 pass/fail during the 2020-2021 application cycle with the goal of recruiting diverse dermatology residency candidates. We conducted a retrospective multiyear cross-sectional study among applicants to the dermatology residency program during the 2018-2019 and 2020-2021 application cycles, the latter excluding use of USMLE Step 1 cutoff scores as a screening tool. Of the applicants, 69.8% (n = 419) and 94.5% (n = 605) had their residency applications reviewed by our program during the 2018-2019 and 2020-2021 application cycles, respectively. There was a statistically significant upward trend in the number of underrepresented in medicine (URiM) applicants offered an interview from 10.4% (n = 5) to 37.7% (n = 20) across the application cycles. Multiple linear regression demonstrated there was a statistically significant decrease in the mean USMLE Step 1 score among applicants reviewed across application cycle and URiM status independently, and as a factor of their interaction (P = .016 and P = .001). By de-emphasizing the USMLE Step 1 score and using the test as originally intended, a marker for licensure, our program significantly increased the number of URiM applicants who were offered an interview and implemented a holistic review process focused on individual attributes and cultural competence.

Vitiligo-like manifestations of graft-versus-host disease in a pediatric population.

Vitiligo-like changes are an uncommon cutaneous manifestation of graft-versus-host disease (GVHD). We report three cases and review the literature of pediatric patients with vitiligo-like changes associated with GVHD. Improved characterization of this phenomenon may lend insight into the biologic pathways that underlie both vitiligo and GVHD.

Melanoma: Molecular genetics, metastasis, targeted therapies, immunotherapies, and therapeutic resistance.

Cutaneous melanoma is a common cancer and cases have steadily increased since the mid 70s. For some patients, early diagnosis and surgical removal of melanomas is lifesaving, while other patients typically turn to molecular targeted therapies and immunotherapies as treatment options. Easy sampling of melanomas allows the scientific community to identify the most prevalent mutations that initiate melanoma such as the BRAF, NRAS, and TERT genes, some of which can be therapeutically targeted. Though initially effective, many tumors acquire resistance to the targeted therapies demonstrating the need to investigate compensatory pathways. Immunotherapies represent an alternative to molecular targeted therapies. However, inter-tumoral immune cell populations dictate initial therapeutic response and even tumors that responded to treatment develop resistance in the long term. As the protocol for combination therapies develop, so will our scientific understanding of the many pathways at play in the progression of melanoma. The future direction of the field may be to find a molecule that connects all of the pathways. Meanwhile, noncoding RNAs have been shown to play important roles in melanoma development and progression. Studying noncoding RNAs may help us to understand how resistance - both primary and acquired - develops; ultimately allow us to harness the true potential of current therapies. This review will cover the basic structure of the skin, the mutations and pathways responsible for transforming melanocytes into melanomas, the process by which melanomas metastasize, targeted therapeutics, and the potential that noncoding RNAs have as a prognostic and treatment tool.

Transcriptional Circuitry of NKX2-1 and SOX1 Defines an Unrecognized Lineage Subtype of Small-Cell Lung Cancer.

Rationale: The current molecular classification of small-cell lung cancer (SCLC) on the basis of the expression of four lineage transcription factors still leaves its major subtype SCLC-A as a heterogeneous group, necessitating more precise characterization of lineage subclasses. Objectives: To refine the current SCLC classification with epigenomic profiles and to identify features of the redefined SCLC subtypes. Methods: We performed unsupervised clustering of epigenomic profiles on 25 SCLC cell lines. Functional significance of NKX2-1 (NK2 homeobox 1) was evaluated by cell growth, apoptosis, and xenograft using clustered regularly interspaced short palindromic repeats-Cas9 (CRISPR-associated protein 9)-mediated deletion. NKX2-1-specific cistromic profiles were determined using chromatin immunoprecipitation followed by sequencing, and its functional transcriptional partners were determined using coimmunoprecipitation followed by mass spectrometry. Rb1flox/flox; Trp53flox/flox and Rb1flox/flox; Trp53flox/flox; Nkx2-1flox/flox mouse models were engineered to explore the function of Nkx2-1 in SCLC tumorigenesis. Epigenomic landscapes of six human SCLC specimens and 20 tumors from two mouse models were characterized. Measurements and Main Results: We identified two epigenomic subclusters of the major SCLC-A subtype: SCLC-Aα and SCLC-Aσ. SCLC-Aα was characterized by the presence of a super-enhancer at the NKX2-1 locus, which was observed in human SCLC specimens and a murine SCLC model. We found that NKX2-1, a dual lung and neural lineage factor, is uniquely relevant in SCLC-Aα. In addition, we found that maintenance of this neural identity in SCLC-Aα is mediated by collaborative transcriptional activity with another neuronal transcriptional factor, SOX1 (SRY-box transcription factor 1). Conclusions: We comprehensively describe additional epigenomic heterogeneity of the major SCLC-A subtype and define the SCLC-Aα subtype by the core regulatory circuitry of NKX2-1 and SOX1 super-enhancers and their functional collaborations to maintain neuronal linage state.

Follicular keratosis of the face in pediatric patients of color.

BACKGROUND/OBJECTIVES: Follicular keratosis (FK) is a poorly understood disorder presenting with multiple, grouped hyperkeratotic follicular papules typically affecting the chin or jawline. This study describes the clinical presentation, histopathology, management, and outcomes of a series of pediatric patients of color with FK of the face, thought to be related to rubbing or friction on the skin. METHODS: Retrospective review of 20 pediatric patients with FK of the face who presented to our pediatric dermatology practice between April 2019 and October 2021. RESULTS: Twenty patients (mean age 12.1 years, 13 females), all self-identified as Black/African American, were included. All presented with an initially asymptomatic, hyperpigmented patch containing multiple hyperkeratotic follicular papules, located on the cheek, chin, upper lip, and/or jawline. Five patients endorsed a history of rubbing the site. Nine patients had onset of the lesions during the COVID-19 pandemic. Treatments included topical vitamin D analogs, corticosteroids, and/or retinoids. Topical vitamin D analogs and retinoids improved the texture and hyperpigmentation of the follicular lesions in only four patients, while topical corticosteroids had no effect. Histopathological examination of two patients revealed multiple dilated follicles containing keratinized material and associated with a sparse dermal inflammatory infiltrate in one patient and granulomatous inflammation within the dermis in the other. CONCLUSIONS: In our cohort of pediatric patients with FK, patients of color were preferentially affected, and all cases were associated with hyperpigmentation. Some patients presented during the COVID-19 pandemic suggesting that friction from facial mask wearing may have induced or exacerbated this uncommon condition.

Prevention of racialized medicine in pediatric dermatology: A call to re-examine skin tone typing.

The Fitzpatrick skin phototype (FSPT), a biologic concept originally constructed in light-skinned patients to measure UVA sensitivity, is widely used today across pediatric dermatology as a proxy for race, a social and political construct. We outline why this is problematic and could contribute to racially inequitable care and discuss the broader question of whether skin tone is relevant to measure in all cases. We propose that, instead of indiscriminately measuring skin tone in all clinical cases, pediatric dermatologists choose the skin characterization variable most relevant to their patient's condition. This both avoids conflating skin tone with race and more broadly quells the myth of racial essentialism and the resultant practice of racialized medicine, which history has shown is used as justification for discriminatory and harmful practices toward racially marginalized groups.

Virtual group visits to reduce psychosocial distress and racial disparities in pediatric vitiligo and alopecia areata patients.

We examined the potential for virtual, pediatric group visits to reduce racial disparities in psychosocial isolation and access to care among children of color with pediatric vitiligo and alopecia areata as well as their caregivers. We have conducted 10 visits with 30 pediatric skin of color patients between 5 and 16 years old: 18 patients with alopecia areata, 12 with vitiligo, 59% female, 64% Black, and 23% Latinx, and 33 parents. After the visits, children and parents felt they had more people they knew and could reach out to about their dermatologic condition, the visits exceeded both children's and parents' expectations, and both children and parents reported that they would continue attending future group visits if offered. Group visits in the virtual format may present an opportunity for reducing racial disparities in psychosocial isolation and access to care across geographic locations in pediatric dermatology.