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복통과 전신 피부 병변을 주소로 내원한 Degos병 1예
구본호 ( Bon Ho Ku ),임연정 ( Yeun Jung Lim ),최효경 ( Hyo Kyung Choi ),김영호 ( Young Ho Kim ),박종욱 ( Jongwook Park ),김치훈 ( Chi Hoon Kim ),장태훈 ( Tae Hoon Jang ),서용우 ( Yong Woo Seo ),조영철 ( Young Cheol Jo ),장기택 ( K 대한장연구학회 2010 Intestinal Research Vol.8 No.1
Malignant atrophic papulosis (MAP), also known as Degos’ disease, is a rare and often fatal occlusive thrombotic vasculopathy, with fewer than seven cases reported in Korea. MAP is characterized by porcelain-white, atrophic, papular skin lesions and multi-organ system involvement, especially the gastrointestinal (GI) tract and nervous system. Involvement of the GI tract is usually associated with a poor prognosis. To date, no treatment has been shown to be effective in the treatment of MAP. We describe a 52-year-old man who presented with a 5-month history of abdominal angina and a 2-year history of multiple skin lesions on the trunk and extremities. The skin lesions were papules, 4-6 mm in diameter, with a porcelain-white center and a slightly raised erythematous telangiectatic rim. A biopsy of a skin lesion showed a wedge-shaped degeneration of collagen in the dermis and atrophic epidermis. An explorative laparoscopy revealed multiple, yellow-white plaques scattered throughout the small bowel. A biopsy of the small bowel showed sclerotic vascular alterations containing intravascular fibrin thrombi. He was started on aspirin (100 mg daily) and has survived for 24 months since the onset of gastrointestinal symptoms. (Intest Res 2010;8:70-74)
증례 : 감염 ; 장게실염에 동반된 Streptococcus viridans와 Bacteroides fragilis 균혈증에 의한 문맥염 1예
구본호 ( Bon Ho Ku ),김영생 ( Young Saeng Kim ),김종훈 ( Jong Hun Kim ),최유경 ( Yu Kyong Choi ),연재우 ( Jae Woo Yeon ),이성규 ( Seong Gyu Lee ),김수연 ( Sue Yun Kim ) 대한내과학회 2009 대한내과학회지 Vol.76 No.5
문맥염은 증상이 다양하고 비특이적이어서 조기 진단이 어렵고, 치료시기를 놓치면 높은 치사율을 보이기 때문에 빠른 진단과 치료가 예후에 중요한 질환이다. 저자들은 지속되는 발열을 주소로 내원한 환자에서 게실염에 동반되어 나타난 S.viridans와 B.fragilis 균혈증에 의한 문맥염을 발견하였고, 항생제 치료만으로 호전되어 퇴원한 증례를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Pylephlebitis, a septic thrombophlebitis of the portal vein or one of its tributaries, is a life-threatening complication of intra-abdominal infection. The causes of pylephlebitis include acute diverticulitis, appendicitis, acute cholecystitis, necrotizing pancreatitis, inflammatory bowel disease, and bowel perforation. Although pylephlebitis is an unusual complication of diverticulitis, its morbidity and mortality remain high. Therefore, early diagnosis and initiation of adequate antibiotic therapy is important for improving the long-term prognosis of patients suffering from this rare disease. We report a case of pylephlebitis with Streptococcus viridans and Bacteroides fragilis bacteremia secondary to diverticulitis with a review of the literature. (Korean J Med 76:622-626, 2009)
김영생 ( Young Saeng Kim ),구본호 ( Bon Ho Ku ),최유경 ( Yu Kyung Choi ),김종훈 ( Jong Hun Kim ),손희정 ( Hee Jung Sohn ),백소야 ( So Ya Paik ),이예리 ( Ye Ri Lee ) 대한내과학회 2009 대한내과학회지 Vol.76 No.5
젖유사샘(mammary-like glands)은 정상적으로 존재하는 외음부 피부 구조물이나 잘 알려져 있지 않다. 이 조직은 아직까지 기능이 불분명하고 에크린샘, 아포크린샘, 젖샘 등과 구별되는 특징을 가지고 있다. 1936년에 Greene에 의해 젖유사샘으로부터 유래한 샘암종이 처음 보고되었고, 이후 약 20여 증례가 보고된 바 있다. 이에, 저자들은 외음부에서 발생한 원발성 젖유사샘암종을 국내에서 최초로 보고하는 바이다. 외음문의 가려움증과 종괴를 주소로 내원한 62세 여자 환자로, 간과 뼈에 다발성 전이가 동반되어 있었다. 외음부와 간종괴의 조직 검사상 유방의 침윤성관암종(invasive ductal carcinoma)과 유사한 소견을 보였으며, 에스트로겐 수용체, 프로게스테론 수용체, HER-2, GCDFP-15 면역염색이 모두 양성이었다. 유방 초음파와 자기공명영상을 촬영하였으나 유방은 정상 소견을 보였다. 따라서 유방의 침윤성관암종과 유사한 조직 소견을 가지는 외음부에 발생한 원발성 젖유사샘암종이 간과 뼈에 전이된 것으로 진단하였다. 환자는 뼈 통증으로 방사선 치료를 받던 중 진단 7주만에 폐렴으로 사망하였다. Mammary-like glands are poorly recognized structures of normal vulvar skin. Here, we report the first case of primary mammary-like gland adenocarcinoma of the vulva in Korea and discuss the differential diagnosis and treatment of this rare tumor. A 62-year-old woman presented with an itching sensation and palpable mass of the vulva. Abdominal computed tomography showed multiple variable-sized nodules with peripheral rim enhancement in the liver. The pathology of the vulva and liver lesions was consistent with invasive ductal carcinoma of the breast, with positive staining for estrogen receptors, progesterone receptors, HER-2, and GCDFP-15. Ultrasonography and magnetic resonance imaging of the breast were normal. Given the histological findings in conjunction with the absence of a breast lesion, a diagnosis of primary mammary-like gland adenocarcinoma of the vulva was made. She died of pneumonia 7 weeks after the diagnosis. (Korean J Med 76:605-610, 2009)
고정자 전류 기반의 MRAC를 이용한 유도전동기의 센서리스 벡터제어에서 회전자 시정수의 보상
박철우(Chul-woo Park),윤경섭(Kyung-sup Youn),임성운(Sung-woon Im),구본호(Bon-ho Ku),권우현(Woo-hyen Kwon) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
The thesis proposes the sensorless vector control method that estimates the rotor speed and rotor time constant at the same time using stator current In the proposed method, stator current error in the stationary reference frame is proportional to estimated speed error, and stator current error in the synchronous reference frame is proportional to estimated rotor time constant error The proposed method can simultaneously produce a fast speed estimation and rotor time constant estimation Therefore, this new method offers an improvement In the performance of a sensorless vector controller. And, the superiority of the proposed method is verified by simulation.
비보정된 스테레오 영상의 시점 합성을 위한 문턱값 설정방법
최재각 ( Jae Gark Choi ),남재열 ( Jae Yeal Nam ),구본호 ( Bon Ho Ku ),김이국 ( Iee Kook Kim ) 한국화상학회 2002 한국화상학회지 Vol.8 No.2
본 논문은 비보정된 스테레오 시퀀스의 시점합성을 위한 코너점 정합에서, 코너점을 찾기위한 문턱값 선택을 자동으로 설정할 수 있는 방법을 제안한다. Seitz의 시점 합성 방법에서는 Harris의 코너 검출기를 사용하여 코너값을 계산한 후, 코너 결정을 위해 사용자가 입력하는 문턱값과 비교하여 코너 유무를 결정하게 된다. 그러나 본 논문에서는 영상의 특성을 이용하여 문턱값을 자동으로 결정하도록 한다. 실험결과, 제안된 방법의 코너점 검출을 통해 김출된 코너점이 첫째, 정확찬 대응점을 찾을 수 있었으며, 둘째, 따라서 fundamental matrix의 정확한 계산등의 안정적 구현이 이루어져 우수한 시점합성 결과를 얻을 수 있었다. This paper proposes a threshold selection method for view synthesis of uncalibrated stereo sequence. Seiz`s view synthesis method first calculates corner values using comer detector, and then decide comer point with comparison of fixed threshold. However this paper decides automatically threshold value using statistic of image. As shown in simulation results, the proposed method finds exact correspondence of comer point and second obtains excellent view synthesis results form stable implementation such as exact computation of fundamental matrix.
김종훈 ( Jong Hun Kim ),김영생 ( Young Saeng Kim ),구본호 ( Bon Ho Ku ),최유경 ( Yu Kyung Choi ),김도훈 ( Do Hoon Kim ),진재용 ( Jae Yong Chin ),오미정 ( Mi Jung Oh ) 대한결핵 및 호흡기학회 2008 Tuberculosis and Respiratory Diseases Vol.64 No.5
Eosinophilic pleural effusions (EPE) are defined as those effusions that contain at least 10% eosinophils, and EPE can be associated with peripheral blood eosinophilia in a variety of systemic diseases. There have been a few cases that have addressed the association of peripheral blood eosinophilia and posttraumatic EPE, and this condition can be misdiagnosed as being the result of other causes due to the delayed presentation. We report here on a case of 47-year-old male who presented with eosinophilic pleural effusion associated with peripheral blood eosinophilia at 2 months after minor chest trauma. We excluded the other possible causes such as consumption of drugs, parasite infection, malignancy, diseases of pulmonary eosinophilic infiltration, autoimmune diseases and pulmonary thromboembolism. We observed his clinical course without specific treatment. Three months later, the pleural effusion completely disappeared and the number of peripheral eosinophils returned to normal. (Tuberc Respir Dis 2008;64:379-382)