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하이퍼큐브상의 오류회복기능을 갖는 메세지 전달 알고리즘
정종원(Chung Jong Won),공헌택(Kong heon Taek),우진운(Woo Jin Woon) 한국정보과학회 1994 한국정보과학회 학술발표논문집 Vol.21 No.1
하이퍼큐브 프로세서들의 커뮤니케이션은 상호 메세지 전달에 의하여 이루어진다. 프로세서들은 운영중 링크나 프로세서에 하드웨어 혹은 소프트웨어적인 결함을 가질수 있는데 신뢰성 높은 하이퍼큐브 시스템은 이러한 결함이 존재할 때도 메세지 전달을 계속 수행할 수 있어야 한다. 이러한 기능을 오류회복기능(Fault-tolerant)이라 한다. 본 연구에서는 깊이 우선 탐색과 독립된 경로를 이용하여 가능한 최단거리로 메세지를 전달하는 오류회복기능을 갖는 알고리즘을 제안하며, 시뮬레이션을 통하여 알고리즘의 성능을 비교, 평가한다.
비골 골두의 종양에서 근위 비골 전 절제술의 임상적 결과
정성택(Sung Taek Jung),정재윤(Jae Yoon Chung),김현종(Hyun Jong Kim),박기헌(Gi Heon Park) 대한정형외과학회 2008 대한정형외과학회지 Vol.43 No.4
목적: 비골 골두에 발생한 종양에 대한 비골 근위부 전 절제술의 임상적 결과에 대해 알아보고자 하였다. 대상 및 방법: 1996년 4월부터 2006년 8월까지 비골 근위부의 골종양에 대해 비골 근위부 전 절제술을 시행 받고 12개월 이상 추시가 가능하였던 10명을 대상으로 하였다. 평균 연령은 27.1세(범위, 5-60세)였고 평균 추시 기간은 64.7개월(범위, 12.6-140.7개월)이었다. 전 절제술은 Malawer가 제시한 절제 기준으로 분류하였으며, 술 후 임상적 결과는 관절운동 범위 및 관절의 안정성 정도를 평가하였으며, Musculoskeletal Tumor Society (MSTS) system을 이용하여 기능을 평가하였다. 결과: 슬관절 운동 범위는 1예에서의 신전구축 5도를 제외하고 모두 신전 0도에서 굴곡 145도의 관절운동범위를 보였으며, 슬관절의 외측 불안정성은 2예에서 grade 1의 불안정성을 보였다. 최종 추시상 MSTS system을 이용한 기능의 정도는 평균 합계 92.6% (73-100%)를 보였다. 술 후 국소 재발한 경우는 없었으며, 골육종 환자 중 폐에 원격 전이가 발생하여 폐 절제술을 시행 받고 추시 중인 경우가 1예 있었다. 결론: 비골두에 발생한 악성 및 공격적 성향을 띄는 골종양에서 비골을 포함한 전 절제술은 슬관절의 안정성을 유지하면서 기능적으로도 우수한 방법으로 사료된다. Purpose: We retrospectively reviewed cases of en bloc resection of the proximal fibula for the treatment of tumor arising from the fibular head. Materals and Methods: Between April 1996 and August 2006, 10 patients who underwent en bloc proximal fibular resection and were followed for at least 12 months were included in this study. The mean age was 27.1 years (range, 5-60 years) and the mean follow-up duration was 64.7 months (range, 12.7-140.6 months). The type of en bloc resection was classified according to the Malawer's resection criteria and the postoperative clinical results were evaluated according to the range of motion, knee joint stability and Musculoskeletal Tumor Society (MSTS) functional scoring system. Results: All patients were able to move the knee joint from 0° extension to 145° flexion except one patient with flexion contracture of 5°. Grade 1 lateral instability of the knee joint was present in two patients. The average MSTS function score was 92.6% (range, 73-100%). There was one patient with lung metastasis who was underwent lobectomy, but there were no patients with local recurrence. Conclusion: En bloc resection of the proximal fibula for the treatment of tumors arising from the fibular head is a useful therapeutic method that preserves the knee stability and promotes good functional outcome.
정영우,박기헌,박형원,정성택,Chung, Young-Woo,Park, Gi-Heon,Park, Hyeong-Won,Jung, Sung-Taek 대한근골격종양학회 2011 대한골관절종양학회지 Vol.17 No.1
목적: 유전성 다발성 외골종 환자에서 상지에 발생한 외골종 병변의 분포와 이와 관련하여 상지의 축성 배열의 변화에 대해 조사하였다. 대상 및 방법: 2001년부터 2009년까지 유전성 다발성 외골종으로 진단받은 38명, 76예를 대상으로 하였다. 외골종 침범 수에 따라 Group A (2부위 이하), Group B (3부위 이상)로 분류하였으며, 각 그룹간 운반각 및 VAS (Visual Analogue Scale), 일상 활동의 제한 정도, 외관상 만족도를 비교 평가하였다. 결과: 외골종으로 진단받은 38명 환자 중 상지에 발생한 외골종은 23명, 43예에서 관찰되었다. 발생 부위로는 상완골 근위부 33예(30%), 척골 원위부 31예(28.2%), 요골 원위부 24예(21.8%) 이었다. Group A, B 각각 운반각은 $10.7^{\circ}$, $13.8^{\circ}$, VAS는 1.3점, 3.5점, 일상생활 능력의 제한은 8점 중 7.3점, 6.6점을 보였으며 외관상 만족한 경우는 13예, 10예였다. 결론: 유전성 다발성 외골종 환자 중 상지 변형은 65%에서 동반되었다. 침범 부위 수가 증가할 수록 운반각 및 VAS는 증가하였고, 일상생활 능력과 만족도는 감소하였다. Purpose: This study was aimed to analyze the incidence and the anatomical distributions of HME (Hereditary Multiple Exostoses) on upper limbs and its related change in alignment of the upper limbs in HME patients. Materials and Methods: Thirty eight patients who had been diagnosed HME between 2001 and 2009, were categorized into two groups; (1) group A (1-2 involvements); (2) group B (${\geq}$3 involvements). We checked the carrying angle, VAS (Visual Analogue Scale), limitations in daily activities, cosmetic satisfaction according to the number of exostoses invasion. Results: Among the 38 patients, 23 patients (43 cases) had exostoses in the upper limbs. The locations of exostoses in the upper limbs were proximal humerus in 33 cases (30%), distal ulna in 31 cases (28.2%), and distal radius in 24 cases (21.8%). The carrying angle of group A and B was $10.7^{\circ}$, $13.8^{\circ}$, VAS was 1.3, 3.5, and the limitations in daily activities was 7.3, 6.6 of 8 points. The cosmetic satisfactory cases were 13 and 10 cases, respectively. Conclusion: The deformity in upper limbs was observed in 65% of the HME patients. As the number of invasion increases, carrying angle and VAS were increased but limitations in daily activities and cosmetic satisfaction were decreased.
Lee, Chang-Hyun,Chung, Chun Kee,Jang, Jee-Soo,Kim, Sung-Min,Chin, Dong-Kyu,Lee, Jung-Kil,Yoon, Seung Hwan,Hong, Jae Taek,Ha, Yoon,Kim, Chi Heon,Hyun, Seung-Jae Journal of Neurosurgery Publishing Group 2017 Journal of neurosurgery. Spine Vol.27 No.5
<B>OBJECTIVE</B><P>As life expectancy continues to increase, primary degenerative sagittal imbalance (PDSI) is diagnosed in an increasing number of elderly people. Although corrective surgery for this sagittal deformity is becoming more popular, the effectiveness of the procedure remains unclear. The authors aimed to collate the available evidence on the effectiveness and complications of deformity-correction surgery in patients with PDSI.</P><B>METHODS</B><P>The authors carried out a meta-analysis of clinical studies regarding deformity correction in patients with PDSI. The studies were identified through searches of the PubMed, Embase, Web of Science, and Cochrane databases. Surgery outcomes were evaluated and overall treatment effectiveness was assessed in terms of the minimum clinically important difference (MCID) in Oswestry Disability Index (ODI) values and pain levels according to visual analog scale (VAS) scores and in terms of restoration of spinopelvic parameters to within a normal range. Data are expressed as mean differences with 95% CIs.</P><B>RESULTS</B><P>Ten studies comprising 327 patients were included. The VAS and ODI values improved after deformity-correction surgery. The smallest treatment effect exceeded the MCID for VAS values (4.15 [95% CI 3.48-4.82]) but not for ODI values (18.11 [95% CI 10.99-25.23]). At the final follow-up visit, the mean lumbar lordosis angle (−38.60° [95% CI −44.19° to −33.01°]), thoracic kyphosis angle (31.10° [95% CI 24.67°-37.53°]), C-7 sagittal vertical axis (65.00 mm [95% CI 35.27-94.72 mm]), and pelvic tilt angle (30.82° [95% CI 24.41°-37.23°]) remained outside their normal ranges. Meta-regression analyses revealed a significant effect of ODI change in relation to lumbar lordosis change (p = 0.004). After a mean of 2 years after deformity correction, the mean lumbar lordosis angle and C-7 sagittal vertical axis decreased by 5.82° and 38.91 mm, respectively, and the mean thoracic kyphosis angle increased by 4.7°. The incidences of proximal junctional kyphosis and pseudarthrosis were 23.7% and 12.8%, respectively.</P><B>CONCLUSIONS</B><P>Deformity correction substantially relieves back pain for about 2 years in adult patients with PDSI. Sufficient surgical restoration of lumbar lordosis can lead to substantial improvement in patient disability and reduced decompensation. Deformity correction represents a viable therapeutic option for patients with PDSI, but further technical advancements are necessary to achieve sufficient lumbar lordosis and reduce complication rates.</P>
김태진,정영철,심재욱,정환욱,이홍복,임경택,이기헌,김동욱,박종택 대한부인종양 콜포스코피학회 1999 Journal of Gynecologic Oncology Vol.10 No.2
Three cases of synchronous carcinomas of endometrium-fallopian tube, endometrium-cervix and endometrium-ovary are reported. Case 1 is endometrial endometrioid adenocarcinoma with FIGO stageIb, Grade 2 and tubal serous adenocarcinoma with FIGO stage Ib, Grade 2. Case 2 is endometrial serous carcinoma with FIGO stage Ilb and squamous cell carcinoma with FIGO stage Ial. Case 3 is endometrial endometrioid adenocarcinoma with FIGO stage Ia, Grade 1 and ovarian mucinous adenocarcinoma with FIGO stage IIIa, Grade 2. There is much controversy with respect to staging and management of such cases since these tumors may represent either two synchronously occurring primaries or single primary with metastases. It is suggested that when each tumor is different histological subtype the tumors may be considered as two separate primaries and treatment may be less aggressive. It may be a favorable prognosis. The authors present three cases of synchronous carcinomas with a review of literature.
상부 위장관 출혈로 발현된 십이지장 양성 기질 종양 1예
정명교,박은택,이원동,김재환,이상헌,김기훈,배경임,제인수,이상혁,설상영,정정명 白中央醫療院 2004 仁濟醫學 Vol.25 No.1
Small bowel tumors comprise less than 5% of gastrointestinal neoplasm. Because of their rarity, a correct diagnosis is very difficult and often delayed. Gastrointestinal stromal tumors(GIST) are spindle cell tumors occuring mainly in adults with 5-year survivals of 50-56% and 10-year survivals of 35-43%. It is difficult that we concluded clinical manifestation of GIST. At the time of diagnosis, we already consider metastatic lesions as malignancy, which is suggested poor prognosis. Patients frequently complain vague intermittent abdominal pain. Occasionally they experience severe colicky pain because of tumor-induced partial intestinal obstruction. Factors playing a prominent role in predicting their biological behavior are tumor site, size, and degree of mitotic activity. Recently, we experienced one case of duodenal benign GIST in a 23-year-old woman who had epigastric pain and intermittent melena, so we report it with a review of the literature.