Acne Fulminans Induced by COVID-19 Vaccination / 대한피부과학회지

Acne fulminans shows severe inflammatory changes in acne lesions and is accompanied by systemic symptoms, such as fever and myalgia. Acne fulminans can leave scars, which can profoundly affect patients’ quality of life and require proper treatment. Herein, we present a case of acne fulminans that occurred after COVID-19 vaccination in a 15-year-old male patient. Considering no signs of infection, new drug administration, and immunological factors that can cause acne fulminans other than COVID-19 vaccination and the short time interval between the time of vaccination and the acne fulminans outbreak, acne fulminans is thought to have been caused by COVID-19 vaccination. Oral steroid and isotretinoin treatment was initiated, and 3 months after the treatment, acne lesions recovered to pre-COVID-19 vaccination status, with no exacerbated episode until 6 months follow-up.

Clinical and Histological Features of Eosinophilic Cellulitis in Korean Patients:A Case Series and Literature Review / 대한피부과학회지

Background@#Eosinophilic cellulitis, also known as Wells’ syndrome, is an uncommon skin disease characterized by recurrent pruritic polymorphous plaques or nodules. There is limited knowledge in the Korean literature regarding the clinical characteristics and course of eosinophilic cellulitis. @*Objective@#To investigate the clinical and histological features of eosinophilic cellulitis in Korean patients. @*Methods@#In this case series study, we retrospectively reviewed the electronic medical records of patients diagnosed with eosinophilic cellulitis at our institutions from 2004 to 2022. We also analyzed the literature published in dermatology and internal medicine journals in Korea. @*Results@#A total of 17 patients were included in this study (age, 39.4±21.8 years; 12 male [70.6%]), with an average disease duration of 4.4 months. We identified six clinical variants, with the typical plaque type being the most common (33.3%), followed by the papulonodular type (22.2%). Eosinophilia was observed in 78.6% of patients, and a flame figure, which is a typical histopathological feature of eosinophilic cellulitis, was observed in 52.9% of patients. Systemic and topical steroids and antihistamines were used as first-line treatment with generally favorable results (82.4%), followed by antibiotics (35.3%), cyclosporine (23.5%), and topical calcineurin inhibitors (23.5%).The recurrence rate during the mean follow-up period of 21.8 months was 29.4%. @*Conclusion@#Eosinophilic cellulitis can present with various clinical manifestations, and flame figures do not appear in all cases; therefore, clinical and histological correlations are critical for accurate diagnosis of patients with eosinophilic cellulitis.

Quality Evaluation of Korean YouTube Videos as a Source of Information on Malignant Melanoma / 대한피부과학회지

Background@#Disseminating public knowledge on malignant melanoma through YouTube is an important way to bridge the gap between physicians and patients. However, videos recorded on this topic in Korea are yet to be evaluated. @*Objective@#We aimed to evaluate the quality of YouTube videos on malignant melanoma recorded in Korea. We also investigated whether there was a difference in the quality of videos made by medical professionals (subdivided into dermatologists and non-dermatologists) and non-medical personnel. @*Methods@#We included all videos recorded in Korean by searching YouTube using the keywords “melanoma” or “malignant melanoma”. The search was performed on March 22, 2021. The inclusion criterion was videos in Korean language that contained medical information about malignant melanoma. The characteristics and content information were collected for each video. Video quality (DISCERN, Global Quality Scale [GQS], Journal of the American Medical Association [JAMA] benchmark criteria) was analyzed. @*Results@#Eighty-five videos met the inclusion criterion for the analysis. Fifty-six (66%) and 29 videos (34%) were made by medical and non-medical personnel, respectively. The videos made by medical professionals significantly contained more of the following information than those made by non-medical personnel: clinical information (p＜ 0.001), symptoms and signs (p=0.001), risk factors (p＜0.05), diagnosis (p＜0.001). Videos made by medical professionals, videos with a length of more than 5 minutes, or videos with more than 10,000 views had significantly higher quality scores (DISCERN, GQS, JAMA). @*Conclusion@#Considering that YouTube is being used as a portal for medical information, the participation of medical professionals is essential for providing more accurate information.