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얼굴의 비특이적인 피부 병변으로 나타난 Kikuchi병 1예
임준수 ( Joon Soo Lim ),권은선 ( Eun Sun Kwon ),명기범 ( Ki Bum Myung ),정승현 ( Seung Hyun Cheong ) 대한피부과학회 2021 대한피부과학회지 Vol.59 No.1
Kikuchi’s disease, also referred to as histiocytic necrotizing lymphadenopathy, is a benign self-limiting lymphadenitis accompanied by mild fever and night sweats. This disorder usually affects young women and presents with non-specific cutaneous findings. A 15-year-old female adolescent presented with erythematous papules and plaques on both cheeks accompanied by fever, night sweats, and right cervical lymphadenopathy. Histopathological evaluation of a skin biopsy specimen showed mild perivascular and periadnexal infiltration in the dermis. Fine-needle aspiration biopsy of lymph nodes revealed coagulative necrosis with lymphocytic, histiocytic, and karyorrhectic debris. We present a rare case of Kikuchi’s disease that was diagnosed based on histopathological evaluation of skin and lymph node specimens. (Korean J Dermatol 2021;59(1):54∼57)
아포크린 분화와 에크린 분화를 동시에 보인 투명세포 한선종 1예
임준수 ( Joon Soo Lim ),권은선 ( Eun Sun Kwon ),명기범 ( Ki Bum Myung ),정승현 ( Seung Hyun Cheong ) 대한피부과학회 2021 대한피부과학회지 Vol.59 No.2
Clear cell hidradenoma (CCH) is a rare benign tumor that shows differentiation toward the structure of a sweat gland. Recently, hidradenoma has been re-classified into apocrine and eccrine variants and CCH has been classified as apocrine differentiation. A 34-year-old man without any underlying diseases presented with an erythematous, papilliform, 1-cm exophytic nodule on the left neck that had been present for 3 years. Skin biopsy specimens were obtained by excision biopsy of his left neck. Histopathologic findings showed a well-circumscribed tumor composed of solid portions with polyhedral cells and clear cells, a tubular space with columnar cells, and decapitation secretion. Additionally, round, basophilic, poroid cells, tubular structures containing hyalinized material, and intercellular bridges were observed in the epidermis. Herein, we present a rare case of CCH with apocrine and eccrine differentiation. (Korean J Dermatol 2021;59(2):144∼147)
주사 환자의 임상적 고찰 및 주사의 진단 분류 체계의 비교에 대한 연구
임준수 ( Joon Soo Lim ),권은선 ( Eun Sun Kwon ),명기범 ( Ki Bum Myung ),정승현 ( Seung Hyun Cheong ) 대한피부과학회 2021 대한피부과학회지 Vol.59 No.8
Background: Rosacea is a common chronic inflammatory skin disease, which primarily affects the central face. In 2002, the National Rosacea Society (NRS) committee developed the first diagnostic criteria for rosacea, based on its subtypes. The revised classification in 2017 prompted a proposal to transit from a subtyping to a phenotyping approach, reflecting current insights into rosacea pathogenesis, pathophysiology, and management. Objective: This study aimed to elucidate the clinical features of rosacea and compare two diagnostic criteria in rosacea patients. Methods: We performed a clinical study on 100 patients with rosacea diagnosed according to the 2002 NRS criteria. The age, sex, clinical features, subtypes, severity, and predisposing factors were evaluated using the questionnaire. In addition, we compared the 2002 and 2017 criteria, and evaluated patients if they met the revised criteria. Results: According to the 2002 NRS classification, the erythematotelangiectatic type (88.0%) was the most frequent, followed by the papulopustular (43.0%), ocular (13.0%), and phymatous (6.0%) types. There were 44 overlapping cases, including 38 cases with 2 subtypes mixed and 6 cases with three subtypes. Six patients were diagnosed with rosacea using the 2002 NRS criteria but they did not satisfy the revised 2017 criteria. Conclusion: We found that the diagnostic features of the 2002 criteria are too ambiguous for the diagnosis of rosacea. Therefore, we recommend that dermatologists recognize the necessity of a transition from a subtyping to a phenotyping approach, according to the 2017 criteria for the diagnosis of rosacea. (Korean J Dermatol 2021;59(8): 624∼633)
배열회수 보일러 스택에서 선회유동 효과에 따른 집진기 성능 특성
임준수(Joon-Soo Lim),최석민(Seok Min Choi),문호규(Hokyu Moon),김풍일(Poongil Kim),한봉기(Bong Gi Han),조형희(Hyung Hee Cho) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Axial cyclone for precipitating the oxide iron in HRSG stack is devised in this study. Numerical simulation is performed to evaluate pressure drop between inlet with outlet of HRSG stack and performance of axial cyclone precipitator. RSM turbulence model is used for calculation because of its good validity with swirl flow. As a result, pressure drop is increased as angle of guide vain is decreased. However performance factor of precipitator which determined from swirl number has maximum point when the angle of guide vain is 40 degree.
선회유동장치에서 익형 베인이 유동특성 및 선회성능에 미치는 영향
임준수(Joon-Soo Lim),최석민(Seok Min Choi),이용문(Young Mun Lee),이남규(Namkyu Lee),김풍일(Poongil Kim),조형희(Hyung Hee Cho) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
Flow separation, which generates at back side of vane in axial cyclone causes increasement of pressure drop and deteriorates collection efficiency of particle which should be avoided for thermal efficiency of plant and environmental problem. On this research, axial cyclone is studied for enhancing swirling performance for collection efficiency by applying curved vane. Numerical method was performed by Ansys Fluent 17.2. On the results, average swirl number is increased when vane angle of flat and curved vane is same.