Pemetrexed, an anti-folate, antineoplastic agent, effectively treats various malignancies such as non-small cell lung cancer (NSCLC) and mesothelioma. Here, we report two cases of recurrent pemetrexed-induced lower extremity erythema and edema, one in a 60-year-old male and the other in a 47-year-old male, who were both treated for recurrent cellulitis on multiple occasions before finally being diagnosed with pemetrexed-induced pseudocellulitis (PIP), a rarely reported adverse effect. This is an important diagnostic pitfall for clinicians to be aware of, as early recognition may minimize patient morbidity and prevent unnecessary hospitalization and antibiotic use for presumed cellulitis.

Granulomatosis with polyangiitis (GPA), formerly Wegener\'s granulomatosis, is a small- and medium-vessel vasculitis with characteristic cutaneous morphologic presentation and systemic involvement. Most patients have palpable purpura at some point in their disease course, but this is not always the presenting manifestation. This autoimmune disorder can affect a range of organs, with the upper and lower respiratory tract, kidneys, and nervous system being commonly implicated, while gastrointestinal and cardiac involvement is less frequent. This is a 44-year-old female presenting to the emergency department (ED) with polyarthralgia and palpable purpura. Palpable purpura was distributed on the oral palate, elbow, and lower back, and a punch biopsy revealed leukocytoclastic vasculitis (LCV). While this was an atypical distribution for leukocytoclastic vasculitis, the skin biopsy provided the necessary evidence to diagnose GPA. This case characterizes non-specific and atypical signs and symptoms of GPA that all providers should be aware of in order to diagnose the condition early in its disease course.

Rapid human-to-human transmission of monkeypox has created a public health emergency requiring prompt, multidisciplinary attention. Dermatologists are at the forefront of diagnosis due to the disease-defining skin lesions. Moreover, patients with pre-existing skin disease and those who are on immunosuppressive medications for skin disease may be at increased risk of severe infection. In this review, a panel of authors with expertise in complex medical dermatology and managing patients on immunosuppression reviews the literature and provides initial guidance for diagnosis and management in dermatology practices. Though there are knowledge gaps due to a lack of controlled studies, we support use of replication-deficit vaccines in all dermatologic patients who meet qualifying risk or exposure criteria. We offer strategies to optimize vaccine efficacy in patients with immunosuppression. We discuss alternative post-exposure treatments and their safety profiles. Finally, we outline supportive care recommendations for cutaneous manifestations of monkeypox. Large scale epidemiologic investigations and clinical trials will ultimately revise and extend our guidance.

Background While studies of hospital dermatology have demonstrated diagnostic discordance between primary teams and dermatology consultants, little is known about the impact of biopsy and clinical-pathologic correlation (CPC) in consultation. This study compares biopsy performance based on diagnostic discordance and evaluates the impact of CPC on the diagnosis. Methods This was a retrospective review of 376 dermatologic consultations at a single academic medical center between July 1, 2017, and June 27, 2018. Results Biopsy was significantly less likely to be performed when the diagnosis by the referring primary team was unspecified (p < 0.001). In 24 percent of cases, the diagnosis based on histopathology alone differed from the diagnosis reached by formal CPC consensus review with either potential or significant impact on management. Conclusion Dermatologists who perform inpatient consultations and rely on hospital-based pathology services may consider a consensus review for CPC. Requests to perform a biopsy may be interpreted as a request for diagnostic assistance rather than pressure to perform a procedure.

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UNASSIGNED: Neutrophilic dermatoses are a heterogeneous group of disorders with significant overlap in associated conditions, clinical presentation, and histopathologic features. This review provides a structural overview of neutrophilic dermatoses that may present in the inpatient setting along with diagnostic work-up and management strategies.
UNASSIGNED: Sweet\'s syndrome has been found in patients with coronavirus disease 2019 (COVID-19). Pyoderma gangrenosum (PG) has been shown to be equally associated with ulcerative colitis and Crohn\'s disease. A clinical trial shows that cyclosporine is equally effective as prednisone in treating PG. Neutrophilic eccrine hidradenitis has been found in the setting of newer antineoplastic medications, such as BRAF inhibitors, as well as in the setting of malignancy without chemotherapy exposure.
UNASSIGNED: Neutrophilic dermatoses are a rare and complex group of dermatoses with varying and overlapping clinical presentations. Physicians should be aware of the growing list of associated diseases in order to build a better differential diagnosis or to potentially investigate for co-existing disease.

The current monkeypox outbreak reawakens the concern that poxviridae have a high potential for zoonotic spillover and causing a pandemic. Much fieldwork and research have been done by health care and public health workers in Africa during previous human outbreaks, and their knowledge should inform our global response to the current outbreak. However, unusual clinical presentations now have potential implications for recognizing the disease. In addition, infections from poxviridae, such as monkeypox, have common cutaneous signs that occur early, may be related to periods of transmissibility, and can leave scarring. Therefore, dermatologists will play a key role in recognizing and diagnosing infections and educating and preparing frontline health care workers for the early detection of new cases and clusters of monkeypox.

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UNASSIGNED: Case-based collaborative learning (CBCL) models that incorporate learner-guided content review, structured preparatory assessment, and interactive case-based classroom sessions have been shown to promote content mastery among medical students. However, limited research has explored the viability of CBCL in resident populations, particularly in dermatology. We therefore sought to investigate the impact of a CBCL curriculum covering complex medical dermatology topics on resident knowledge and learning preferences.
UNASSIGNED: This prospective cohort study included dermatology and combined internal medicine-dermatology resident trainees of all levels (postgraduate years 2-5) in a single residency program in Boston, Massachusetts. Four CBCL sessions covering complex medical dermatology topics were delivered to program residents between March and April 2019. Preparatory material for each session included a 20-minute concept video and a multiple-choice readiness assessment. During the sessions, residents applied their nascent understanding to newly introduced clinical vignettes and cases covering the preassigned materials. To assess knowledge and learner preferences, 15-question surveys were administered before and immediately after curriculum delivery. Changes in knowledge and learner preferences were determined using Student t tests to compare means and χ2 tests to compare proportions.
UNASSIGNED: Of the 30 residents, 29 (96.7%) completed the precurriculum survey and 17 (56.7%) completed the postcurriculum survey. Mean content scores improved significantly (p < .01) from presession (x̅ 5.70; σ 1.88) to postsession (x̅ 9.71; σ 1.88). The majority of respondents indicated a preference for future CBCL sessions, with learning preferences remaining stable over time.
UNASSIGNED: In this single-center prospective cohort study, resident knowledge improved significantly after CBCL curriculum delivery. Most resident learners viewed the curriculum as worthwhile and preferred it to traditional lecture-based didactics. Collectively, our findings suggest that CBCL models can be feasibly implemented and durably convey complex content to resident learners.

Background: Teledermatology offers an opportunity to continually deliver care during the coronavirus disease 2019 pandemic. Objective: To provide quantitative data about the use of teledermatology. Methods: Retrospective analysis of teledermatology consultations was performed from March 16 to May 1, 2020. The number/type of encounters, differences in diagnoses, and prescriptions between asynchronous and synchronous teledermatology visits were analyzed. Results: A total of 951 visits (36.2%) were asynchronous whereas 1,672 visits (63.8%) were synchronous. Only 131 (<5%) visits required an acute in-person follow-up. The diagnosis of acne was more frequent with asynchronous visits (p < 0.002, Bonferroni corrected). Antibiotics and nonretinoid acne medications were prescribed more with asynchronous visits, whereas immunomodulators and biologics were more commonly prescribed with synchronous visits (p < 0.02, Bonferroni corrected). Providers at our institution were split on preferred mode (54.2% synchronous, 45.8% asynchronous); however, synchronous visits were preferred for complex medical dermatology patients and return patients (p < 0.05). Limitations: This study is limited by being a single-center study. Conclusions: Asynchronous teledermatology was used more for acne management, whereas synchronous teledermatology was preferable to providers for complex medical dermatology. Postanalysis of the data collected led us to institute a hybridization of our asynchronous and synchronous teledermatology.