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윤대관,김도연,정주현,염규진,김동호,이영,최미수,박병철,박병철,김명화 대한피부과학회 2024 대한피부과학회지 Vol.62 No.2
Background: In the current situation, where severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is rapidly spreading, vaccines for coronavirus are thought to be the most effective approach to containing the situation. However, limited comparative data are available on cutaneous adverse reactions to coronavirus vaccination in Korea. Objective: We retrospectively reviewed the clinical and histopathological characteristics of adverse cutaneous reactions following coronavirus vaccination. Methods: We retrospectively reviewed the clinical and histopathological characteristics of 95 patients who were vaccinated with Pfizer, Moderna, AstraZeneca, and Janssen vaccines and visited the Dermatology Departments of Dankook University Hospital and Chungnam National University Hospital. Results: The mean age was 49.3±17.5 years. Patients who received the AstraZeneca vaccine had an average age of 61.7±10.8 years, significantly higher than those in the Pfizer (44.1±18.7 years) and Moderna (42.5±15.0 years) groups (p<0.001). Of the 95 patients, 36 (37.9%) were diagnosed with urticaria, 24 (25.3%) with morbilliform eruption, 18 (18.9%) with petechiae and purpura, and eight (8.4%) with erythema multiforme. Additionally, there were diagnoses of erythema nodosum, alopecia areata, eczema, generalized pustular psoriasis, acute generalized exanthematous pustulosis, pityriasis rosea, and bullous pemphigoid. In the AstraZeneca-vaccinated group, the proportion of morbilliform eruptions was significantly higher than that in the Pfizer- and Moderna-vaccinated groups (p=0.008). The Pfizer- and Moderna-vaccinated groups had higher rates of urticaria than did the AstraZeneca-vaccinated group. However, this difference was not statistically significant (p=0.083). Conclusion: This study described the clinical characteristics of cutaneous adverse reactions after coronavirus vaccination.
Bi₂O₃첨가 Ce_(0.8)Gd_(0.2)O_(2-δ) 세라믹스의 소결거동
윤대관,이주신 경성대학교 공학기술연구소 2003 공학기술연구지 Vol.S1 No.2
The sintering behavior of Bi₂O₃-added Ce_(0.8)Gd_(0.2)0_(2-δ) ceramics was investigated in the sintering temperature range of 1100℃~1500℃ with intervals of 100℃. In lower temperature regions of 1100℃ and 1200℃ the sintered density increased with increasing Bi₂O₃ content due to the liquid phase sintering. However, in higher temperature regions over 1300℃ larger evaporation of Bi₂O₃ induced the decrease in density.
두피의 피지샘 모반에서 발생한 유두모양 땀관낭샘 제자리암종
윤대관 ( Dea Kwan Yun ),손우리 ( Uri Shon ),성기현 ( Gi Hyun Seong ),이동윤 ( Dong Yoon Lee ),최미수 ( Misoo Choi ),김명화 ( Myung Hwa Kim ),박병철 ( Byung Cheol Park ) 대한피부과학회 2021 대한피부과학회지 Vol.59 No.6
Syringocystadenocarcinoma papilliferum in situ is extremely rare. A 51-year-old female presented with a solitary yellowish patch on the scalp, accompanied by hair loss and a protruding mass. Histopathological evaluation revealed a large number of sebaceous glands and mild papillomatosis without hair follicles. The tumor contained many cystic spaces filled with amorphous material and a connection to the epidermis. The tumor cells showed papillomatous projections and were multilayered with nuclear atypia but no dermal involvement or lymphovascular invasion. On immunohistochemical analysis, the tumor cells showed immunopositivity for carcinoembryonic antigen, Ki-67, epithelial membrane antigen, and gross cystic disease fluid protein-15. Therefore, the patient was diagnosed with syringocystadenocarcinoma papilliferum in situ originating from a nevus sebaceus. The tumor was removed by wide excision, and no recurrence was observed. Our case report supports the multistep pathogenesis of syringocystadenocarcinoma papilliferum originating from a nevus sebaceus. (Korean J Dermatol 2021;59(6):483∼486)