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서동우 ( Dong Woo Suh ),유박린 ( Bark Lynn Lew ),심우영 ( Woo Young Sim ) 대한피부과학회 2014 대한피부과학회지 Vol.52 No.9
Epithelioid blue nevus is a rare variant of blue nevus that has been recently described in patients with the Carney complex. However, sporadic cases have been reported even without the Carney complex. It typically presents as an asymptomatic, blue-gray, smooth-surfaced macule or papule occurring most often on the extremities and trunk. However, a few cases occurring on the mucosa have been reported. A 21-year-old man presented with a 0.4-cm sized solitary dark brownish or black papule on the lower lip. On histological examination, the major part of the specimen showed an infiltration of intensely pigmented epithelioid cells, the rest was composed of mildly pigmented spindle cells. There was no junctional activity, necrosis, or cellular atypia. These findings were consistent with epithelioid blue nevus. The patient did not exhibit any features associated with the Carney complex. No evidence of recurrence was observed during the follow-up period of 24 months. Herein, we report a rare case of epithelioid blue nevus arising on an unusual site. (Korean J Dermatol 2014;52(9):658∼661)
서동우 ( Dong Woo Suh ),유박린 ( Bark Lynn Lew ),심우영 ( Woo Young Sim ) 대한피부과학회 2013 대한피부과학회지 Vol.51 No.6
Angioleiomyoma is a rare benign tumor arising from vascular smooth muscle which commonly develops on the lower extremities of middle-aged women. It is rare to occur on the fingers. Angioleiomyoma is classified into three histological subtypes; solid, venous and cavernous. The solid type is most common but the cavernous type is very rare. We report a case of a 53-year-old female with a digital cavernous angioleiomyoma. The patient had a 2-year history of an asymptomatic and slowly enlarging 1.3×1.0 cm-sized subcutaneous nodule on the distal phalanx of her second left finger. Histopathologic examination showed a well-demarcated nodular tumor in the dermis, which composed of numerous, dilated vessels and bundles of smooth muscle fibers.
저탄소 보론강의 경화능에 미치는 Mo 및 Cr 함량의 영향
황병철,서동우,Hwang, Byoungchul,Suh, Dong-Woo 한국재료학회 2013 한국재료학회지 Vol.23 No.10
The hardenability of low-carbon boron steels with different molybdenum and chromium contents was investigated using dilatometry, microstructural observations and secondary ion mass spectroscopy (SIMS), and then discussed in terms of the segregation and precipitation behaviors of boron. The hardenability was quantitatively evaluated by a critical cooling rate obtained from the hardness distribution plotted as a function of cooling rate. It was found that the molybdenum addition was more effective than the chromium addition to increase the hardenability of boron steels, in contrast to boron-free steels. The addition of 0.2 wt.% molybdenum completely suppressed the formation of eutectoid ferrite, even at the slow cooling rate of $0.2^{\circ}C/s$, while the addition of 0.5 wt.% chromium did this at cooling rates above $3^{\circ}C/s$. The SIMS analysis results to observe the boron distribution at the austenite grain boundaries confirmed that the addition of 0.2 wt.% molybdenum effectively increased the hardenability of boron steels, as the boron atoms were significantly segregated to the austenite grain boundaries without the precipitation of borocarbide, thus retarding the austenite-to-ferrite transformation compared to the addition of 0.5 wt.% chromium. On the other hand, the synergistic effect of molybdenum and boron on the hardenability of boron steels could be explained from thermodynamic and kinetic perspectives.
이동우(Dong-Woo Lee),함봉진(Bong-Jin Ham),김성주(Sung-Joo Kim),성제수(Jea-Su Sung),김봉석(Bong-Seog Kim),신정호(Jong-Ho Shin),정은기(Eun-Kee Chung),홍진표(Jin-Pyo Hong),서동우(Tong-Woo Suh),조맹제(Maeng-Je Cho) 대한사회정신의학회 2004 사회정신의학 Vol.9 No.2
목 적: 본 연구는 2001년도에 전국적으로 시행된 역학조사 결과를 분석하여 한국인에서의 알코올 사용장애의 유병률과 위험요인을 알아 보고 1980년대에 시행된 전국규모 역학조사 결과와 비교하기 위한 것이다. 방 법: 전국 10개 지역에서 다단계 집락추출법을 사용하여 주민등록상에서 12,886가구를 선정하고 각 가구당 18~64세 성인 한 명을 무작위로 선정하였다. 그 중 실제 방문을 통하여 거주불명, 부재, 이사, 사망 등을 제외한 7,867명을 대상으로 조사를 실시 하였다. 5일간의 교육을 받은 조사요원이 가정방문을 하여 모든 대상자들에게 한국어판 Composite International Diagnostic Interview(K-CIDI)를 적용하였다. 면담 불능, 면담 거부 등의 경우를 제외한 6,275명이 조사를 완료하여 79.8%의 반응율을 보였다. K-CIDI 자료로부터 DSM-Ⅳ에 의한 알코올 남용, 알코올 의존의 진단을 산출하였다. 표본과 전국 인구분포의 차이를 보정 하기 위하여 연령과 성에 따른 가중치를 계산하였고 SUDAAN 통계 프로그램을 이용하여 유병율과 표본오차를 계산하였다. 결 과: 알코올 남용의 평생/일년/일개월 유병율은 7.1%/2.0%/1.2%였으며 알코올의존의 평생/일년/일개월 유병율은 10.2%/5.1%/3.5% 였다. 알코올 남용의 유병율은 남자에서 약 7배 높았으며, 알코올 의존의 유병율은 남자에서 약 3배 높았다. 관련 요인에 대한 분석 에서는 여성에서 알코올 남용의 위험도가 낮았고(OR=0.2, p=0.00), 농촌지역에서의 위험도가 높았으며(OR=2.0, p=0.03), 18~24세의 젊은 연령에 비해 25~44세(OR=0.3, p=0.03) 및 45~64세(OR=0.2, p=0.03)의 위험도가 낮았다. 알코올 의존의 위험도 또한 여성(OR=0.2, p=0.00)에서 낮게 나타났으며, 소득이 낮은 경우가 위험도가 낮았다. 이혼 또는 사별(OR=2.0, p= 0.02)한 경우는 위험도가 높게 나타났다. 결 론: 1980년대의 조사결과와 비교하여 알코올의존의 유병률은 큰 차이가 없었으나 알코올 남용의 유병률은 현저히 저하되었고 알코올 남용과 알코올 의존의 비율이 역전되었으며 남녀의 유병률 차이 또한 줄어든 양상을 보였다. 이러한 변화는 알코올 사용장애의 진단 기준의 변화, 우리 사회의 음주문화의 변화와 사회문화적 변화에 기인한 것으로 추정된다. Objectives:This study was intended to examine the prevalence and correlates of alcohol abuse and alcohol dependence by Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition(DSM-IV) criteria in normal adult population using data from the Korean Epidemiologic Catchment Area(KECA) study. Methods:Data were derived from 6,275 household residents over 18 to 64 years of age who responded to KECA survey. Prevalence and correlates were assessed by World Health Organization’s(WHO) Korean Composite International Diagnostic Interview version 2.1(K-CIDI). Results:The overall weighted prevalence of alcohol abuse was 7.1%/2.0%/1.2%(lifetime/12 month/1 month). The overall weighted prevalence of alcohol dependence was 10.2%/5.1%/3.5%(lifetime/12 month/1 month). The significant correlates of alcohol abuse were male, rural haitats. Those of alcohol dependence were male, being divorced/separated/ widowed. Conclusion:The prevalence of alcohol abuse was much lower than that of the study performed by DIS in 1984. The change may be related to the sociocultural change during 15 years.