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이경근 ( Kyoung Geun Lee ),한형진 ( Hyung Jin Hahn ),명기범 ( Ki Bum Myung ),정승현 ( Seung Hyun Cheong ) 대한피부과학회 2019 대한피부과학회지 Vol.57 No.3
Background: Rosacea is a relatively common inflammatory skin disease characterized by central facial erythema that persists for several months or longer. Experimental studies have demonstrated that rosacea compromises the epidermal barrier protection against allergens and irritants, rendering rosacea patients susceptible to contact hypersensitivity and skin irritation. Objective: This study aimed to investigate allergic and irritant reactions to topical agents and cosmetics in rosacea patients using patch tests. Methods: Rosacea signs and subtypes of 40 patients were recorded and subjective symptoms and clinical experiences related to topical agents and cosmetics were assessed using a questionnaire. Patch tests were performed in these patients using the Korean Standard Series (Chemotechnique Diagnostics, Sweden), the TRUE test<sup>Ⓡ</sup> (Mekos Laboratories ApS, Denmark), and 26 selected fragrance and 31 cosmetic antigens (TROLAB, Germany). Results: Of 40 patch-tested patients, 26 (65%) showed at least 1 positive reaction and 13 (32.5%) showed 2 or more positive reactions. The most common allergens were nickel (II) sulfate (50%), cobalt chloride (10%), epoxy resin (7.7%), and thimerosal (7.5%). Thirteen patients (32.5%) experienced irritant patch test reactions. There were no significant differences in allergic or irritant positive reactions between mild, moderate, and severe cases of rosacea or between rosacea subtypes. Irritant reactions were more common in fair-skinned participants. Conclusion: Different topical medications are used in the treatment of rosacea patients. Exacerbation of rosacea may be caused by a hypersensitivity reaction or irritation induced by the topical agent or by cosmetics. (Korean J Dermatol 2019;57(3):117∼125)
이경근 ( Kyoung Geun Lee ),고병용 ( Byoung Yong Koh ),권은선 ( Eun Sun Kwon ),명기범 ( Ki Bum Myung ),정승현 ( Seung Hyun Cheong ) 대한피부과학회 2018 대한피부과학회지 Vol.56 No.1
Crohn’s disease is a chronic granulomatous disease involving any part of gastrointestinal tract. The skin is a common site of extraintestinal involvement in Crohn’s disease. The most common sites of cutaneous involvement in Crohn’s disease are the perineal and perianal areas. Cutaneous Crohn’s disease is relatively common among those previously diagnosed with gastrointestinal Crohn’s disease. A 22-year-old woman presented with a history of a tender erythematous swelling on the vulva, predominantly on the right side, for several months. She had no previous medical history, including Crohn’s disease. Histopathologic examination on the right side of labium majus showed upper dermal edema and granulomatous non-caseating necrosis composed of multinucleated giant cells, as well as perivascular and interstitial lymphoplasmocytic infiltration in the dermis. Under gastroenterology consultation, endoscopic examination was performed. Colon biopsy revealed chronic inflammation with lymphoplasmocytic infiltration, consistent with the active stage of Crohn’s disease. Herein, we report a rare case of Crohn’s disease initially presenting as vulvar swelling. (Korean J Dermatol 2018;56(1):49∼52)
이경근 ( Kyoung Geun Lee ),고병용 ( Byoung Yong Koh ),권은선 ( Eun Sun Kwon ),명기범 ( Ki Bum Myung ),권미혜 ( Mi Hye Kwon ),정승현 ( Seung Hyun Cheong ) 대한피부과학회 2017 大韓皮膚科學會誌 Vol.55 No.5
Acute cutaneous lupus erythematosus (ACLE) on the face is a usual pattern of presentation. However, it can rarely present with a generalized distribution. A hyperacute form of ACLE can mimic Stevens-Johnson syndrome (SJS) and toxic epidermal necrosis (TEN). A 33-year-old man presented with erythematous eroded papules and patches on his head, neck, and upper chest over 2 months. Moreover, he showed hemorrhagic crusted erosions on his lips, and buccal and nasal mucosa, in addition to conjunctival injection. A skin biopsy from his cheek showed a mild degree of vacuolar alteration, thickening of the basement membrane, perivascular and periadnexal lymphohistiocytic infiltration, and stromal mucin deposition. Direct immunofluorescence (DIF) demonstrated IgG and IgM deposits along the basement membrane zone. Laboratory investigations demonstrated pancytopenia, positive antinuclear antibody (ANA), anti-double stranded DNA (anti-dsDNA), and anti-Ro antibodies. The patient was diagnosed with systemic lupus erythematosus (SLE) based on clinical, histological, and laboratory markers of autoimmune disease. We report a rare case of SLE presenting as SJS. (Korean J Dermatol 2017;55(5):293∼296)
김경수(Kim, Kyoung-Su),프레드댄스로(Fred Dansereau),이경근(Lee, Kyung-Geun),조용현(Cho, Yong-Hyeon),김인숙(Kim, In-Sook),노현재(Noe, Hyun-Jae),김광숙(Kim, Kwang-Sook),양동민(Yang, Dong-Min) 한국인사관리학회 2013 조직과 인사관리연구 Vol.37 No.3
본 연구자들은 리더십과 분배적 정의에 대한 기존의 접근에 기초하여 상사의 평등한 또는 불평등한 대우에 대해 부하들이 공정하다고 지각하는가 아니면 불공정하게 지각하는가에 대해 연구하였다. 지방 소재 7개 기업으로부터 49명의 상사와 147명의 부하로부터 수집한 다수준분석(multiple-level of analyses) 설문자료를 분석한 결과 어떤 상사는 동일한 집단에 속한 부하들을 평등하게 대우하는 반면, 다른 상사들은 동일한 집단에 속한 부하들을 불평등하게 대우하는 것으로 나타났다. 그러나 이러한 결과에도 불구하고 동일한 집단에 속한 부하들은 자신들의 상사가 자신들을 평등하게 또는 불평등하게 대우하는가에 대해 동의하는 것이 아니라 오히려 자신들이 지각하는 공정함과 평등함이 부하의 상사와의 개별화된 리더십과 관계가 있는 것으로 나타났다. 또한 부하들이 지각하는 공정함과 평등함의 관계는 집단간과 집단내에서 동일한 차이 즉 집단의 효과가 없는 것으로 나타났다. 이러한 결과는 상사의 대우에 대해 부하가 지각한 평등함과 공정함이 교차수준(개인과 집단의 cross-level)에서 일어나는 것이 아니라 구체적 수준(level-specific, 개인)에서 일어난다는 것을 보여준다. 또한 본 연구의 결과는 상사의 대우에 대한 부하들의 공정함과 평등함의 지각이 상사와 부하의 개별화된 짝 관계를 통해서만 일어난다는 것을 보여준다. 본 연구의 결론부분에서는 상사와 부하의 개별화된 상호간 짝 관계가 집단수준에서 일어나는 과정에 대한 부하들의 지각을 체계적으로 오해하게끔 만들 수 있다는 것과 그 결과 잘못된 수준의 오류를 포함하는 추론을 이끌어낼 수도 있다는 점에 대해 논의가 이루어졌다. Based on approaches to leadership and distribute justice, this paper investigated whether subordinates view equal or unequal treatment by their supervisor as fair or unfair. Multiple-level analyses of data, collected in 7 different organizations from 49 managers and their 147 subordinates, suggest that some supervisors treat their subordinates equally but others treat their subordinates unequally. Despite this finding, subordinates who report to the same supervisor do not necessarily agree about their supervisor treats them equally or unequally. Instead, reports of equity and equality covary with subordinates' individualized interpersonal relationships with their supervisors. In addition, the results showed that the relationship between equity and equality perceived by subordinates varies between groups and within groups. These results indicate that group effects do not exist and indicate that subordinates' perceptions of equity and equality for supervisor's treatment do not occur at cross-levels but level-specific. The results also showed that subordinates' perceptions of equity and equality for supervisor's treatment occur through the individualized interpersonal relationships. This paper concludes with a discussion of the finding that individualized interpersonal relationships between supervisors and subordinates may systematically bias subordinates' perceptions of group-level processes and produce correlations that result in inferences that contain "the fallacy of the wrong level."
Acitretin으로 치료된 다발성 거대각질가시세포종 1예
권은선 ( Eun Sun Kwon ),이경근 ( Kyoung Geun Lee ),고병용 ( Byoung Yong Koh ),명기범 ( Ki Bum Myung ),정승현 ( Seung Hyun Cheong ) 대한피부과학회 2017 대한피부과학회지 Vol.55 No.4
Giant keratoacanthoma is an uncommon variant of keratoacanthoma, which may increase to a diameter of several centimeters. Although keratoacanthomas usually resolve spontaneously, giant keratoacanthoma can be invasive and destructive. A 49-year-old man presented with a 5-year history of multiple large hyperkeratotic and crusted plaques and nodules on sun-exposed areas such as the face, ear, hand, and forearm. Some lesions involuted spontaneously, whereas others became rather enlarged. The biopsy specimen revealed horn-filled crater formation, epidermal extending resembling a buttress, and an eosinophilic glassy appearance in the keratinocytic cytoplasm. We treated the lesions with acitretin, and they almost completely resolved after 13 weeks. Here we describe a case of multiple giant keratoacanthoma treated with acitretin. (Korean J Dermatol 2017;55(4):249∼252)