Postinflammatory Hyperpigmentation Following Mohs Micrographic Surgery: An Observational Study.

IMPORTANCE: Functional and cosmetic outcomes following Mohs micrographic surgery (MMS) are poorly studied in individuals with skin of color (SOC). Postinflammatory hyperpigmentation (PIH) may be long-lasting and highly distressing. SOC individuals are particularly susceptible to PIH following procedures.  Objective: To characterize factors that contribute to the development of PIH following MMS in SOC. DESIGN: This retrospective study included 72 SOC individuals with 83 cases of keratinocyte carcinoma treated with MMS between August 2020 and August 2021 at a single medical center in the Bronx, New York. RESULTS: Postinflammatory hyperpigmentation following Mohs micrographic surgery was more common in Fitzpatrick skin types (FST) IV to V (48.0%) compared to FST I to III (18.2%; P=0.006). Grafts and granulation resulted in higher rates of PIH compared to linear repairs and flaps (87.5% vs 30.7%; P=0.003). Cases with postoperative complications resulted in higher rates of PIH compared to cases without (81.8% vs 29.2%; P=0.001). In a subset analysis of linear repairs, polyglactin 910 as a subcutaneous suture produced a higher rate of PIH compared to poliglecaprone 25 (46.2% vs 7.1%; P=0.015).  Conclusions and Relevance: Individuals with SOC (FST IV to V) are more likely to develop PIH following MMS. Grafts and granulation lead to PIH more often than linear repairs and flaps. Postoperative complications significantly increase the risk of PIH. Surgeons should consider these risk factors during surgical planning in an effort to mitigate PIH in SOC individuals. Studies with larger sample sizes are indicated.  J Drugs Dermatol. 2024;23(5):316-321. doi:10.36849/JDD.8146.

Diversifying the Mohs Workforce: Understanding Barriers of Applicants to Mohs Micrographic Surgery Fellowship.

BACKGROUND: The population of the United States is becoming increasingly diverse, yet dermatology, especially Mohs micrographic surgery (MMS), lags behind. OBJECTIVE: This survey study investigates perceived barriers of underrepresented groups in medicine (URM) who are pursuing fellowship in Mohs micrographic surgery and dermatologic oncology (MSDO). METHODS AND MATERIALS: An IRB-approved survey was distributed electronically to accredited dermatology residencies between December 2020 and April 2021. RESULTS: One hundred and thirty-three dermatology residents responded to the survey and of the participants, 21% identified as a URM. There was no significant difference in those interested in applying for MSDO fellowship between URMs and non-URMs. URMs rated the following factors significantly higher when deciding to pursue MSDO fellowship: lack of perceived diversity in target patient population (mean 3.61, SD 1.66), race/ethnicity/gender of past MSDO fellows (mean 3.25, SD 1.71), perceived attitudes of MSDO fellowships towards an applicant’s race or ethnicity (mean 3.25, 1.65 SD), and lack of diversity of trainees and faculty in MMS (mean 3.61, SD 1.47). CONCLUSION: This study is one of the first to evaluate perceived barriers to diversifying the MMS workforce. The perceived barriers we have identified are complex and require concerted efforts for improvement. J Drugs Dermatol. 2023;22(5): doi:10.36849/JDD.7083.

Mohs Micrographic Surgery in Skin of Color.

The United States population is becoming increasingly diverse. Data show increased utilization of Mohs micrographic surgery (MMS) in people of color. Though the incidence of skin cancer in skin of color is low, morbidity and mortality are disproportionately high. Still, published literature on the topic is lacking. In this article, we outline our approach to MMS in skin of color. We review salient topics not published elsewhere in literature in this context, including post-operative postinflammatory hyperpigmentation and suture selection in skin of color. Our goal is to better equip dermatologic surgeons for the rapidly changing demographics of our patient population. We feel this is an important step in addressing the dire health disparities associated with skin cancer in skin of color. J Drugs Dermatol. 2022;21(5):536-541. doi:10.36849/JDD.6469.

Anti-tumor necrosis factor drug responses and skin-blood DNA methylation age: Relationships in moderate-to-severe psoriasis.

Studies have examined the utility of DNA methylation as a biomarker of psoriasis treatment responses, but investigations of treatment responses with Skin-Blood DNA methylation age (SkinBloodAge)-a methylation-based measure of health designed using skin tissues-are lacking. Using a HumanMethylation450 BeadChip blood DNA methylation data set from 70 white patients who presented with moderate-to-severe plaque psoriasis and were treated with anti-tumor necrosis factor (TNF) agents in Madrid, Spain, we examined the cross-sectional relationships of SkinBloodAge with anti-TNF treatment responses. Partial responders had a 7.2-year higher mean SkinBloodAge than excellent responders (P = .03). In linear regression models adjusted for chronological age, sex and anti-TNF agents - on average - partial responders had a 2.65-year higher SkinBloodAge than excellent responders (95%CI: 0.44, 4.86, P = .02). This relationship was attenuated in a sensitivity analysis adjusting for white blood cells including known T-cell mediators of psoriasis pathophysiology (ß = 1.91-years, 95%CI: -0.50, 4.32, P = .12). Overall, our study suggests that partial responders to anti-TNF therapy have higher SkinBloodAges when compared to excellent responders. Although these findings still need to be confirmed more broadly, they further suggest that SkinBloodAge may be a useful treatment response biomarker that can be incorporated with other blood tests before anti-TNF therapy initiation in moderate-to-severe psoriasis patients.

Mixing of Injectable Fillers: A National Survey.

BACKGROUND: The mixing of hyaluronic acid or calcium hydroxylapatite fillers with normal saline, plain lidocaine, or lidocaine with epinephrine before injection is a familiar practice among dermatologists. However, the frequency of this practice and rationale behind it has not been well studied. OBJECTIVE: To better elucidate the clinical practice of mixing fillers with other solutions before injecting among dermatologists. METHODS: A survey was electronically distributed to members of the American Society for Dermatologic Surgery. RESULTS: Four hundred seventy-five dermatologists responded to the survey. Thirty-five percent of respondents mix fillers before injection. Solutions used were as follows: plain lidocaine (44%), lidocaine with epinephrine (36%), normal saline (30%), and sterile water (7%). Respondents mix filler for the following reasons: to decrease viscosity (40%), increase anesthesia (30%), decrease swelling (17%), and increase volume (13%). CONCLUSION: Despite the lack of evidence, more than one-third of dermatologists surveyed mix fillers with other solutions before injection. Plain lidocaine is most commonly used. The top reason for mixing fillers is to decrease viscosity and facilitate ease of injection. More scientific data are needed to support this practice and better understand the biophysical changes that occur when mixing fillers with other solutions.

Clinical Diagnostic Accuracy of Onychomycosis: A Multispecialty Comparison Study.

Although onychomycosis can be diagnosed clinically, many guidelines still recommend pathologic confirmation of the diagnosis prior to initiation of systemic treatment. We retrospectively reviewed results from 541 toenail clippings (160 by dermatologists, 198 by podiatrists, and 183 by other provider types) sent to the Brigham and Women's Department of Dermatopathology between January 2000 and December 2013 for confirmatory periodic acid-Schiff (PAS) testing of clinically diagnosed onychomycosis. Of these, 93 (58.1%), 125 (63.1%), and 71 (38.8%) were sent for confirmation of onychomycosis (as opposed to diagnosis of onychodystrophy) by dermatologists, podiatrists, and other provider types, respectively. Confirmatory PAS stains were positive in 70 (75.3%), 101 (80.8%), and 47 (66.2%) of samples ordered by dermatologists, podiatrists, and other providers, respectively. Our study demonstrates that clinical diagnosis of onychomycosis in the appropriate clinical setting is accurate across specialties. Further prospective investigation on the accuracy of clinical diagnosis of onychomycosis may be beneficial.

Telangiectasia macularis eruptiva perstans associated with a sicca complex.

We present the case of woman in her 50s who developed numerous red-brown telangiectatic macules on her trunk and extremities, as well as persistent dry eyes and dry mouth. Skin biopsy was consistent with telangiectasia macularis eruptiva perstans (TMEP). Serum tryptase was elevated suggesting systemic involvement. Anti-Ro and La were negative. ANA was positive. Salivary gland biopsy revealed a focus score of 3 and immunostains revealed infiltrates of aberrant CD117 positive mast cells. This case suggests a mechanistic role of mastocytosis in salivary compromise.