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비호지킨림프종에서 골수흡인 검사 결과에 따른 전체 생존율의 분석
최정윤 ( Jung Yoon Choi ),강가원 ( Ka-won Kang ),이병현 ( Byung-hyun Lee ),유은상 ( Eun Sang Yu ),김대식 ( Dae Sik Kim ),이세련 ( Se Ryeon Lee ),성화정 ( Hwa Jung Sung ),김석진 ( Seok Jin Kim ),최철원 ( Chul Won Choi ),김병수 ( By 대한내과학회 2019 대한내과학회지 Vol.94 No.2
Background/Aims: The staging work-up for patients with non-Hodgkin’s lymphoma includes bone marrow aspiration and biopsy. Consistent results of both procedures can clarify the diagnosis. However, no clear guidelines have been established regarding positive results for bone marrow aspiration alone. The aim of this study was, therefore, to analyze the overall survival (OS) for the clinical diagnoses of these patients using morphological methods. Methods: We performed a retrospective analysis of patients who were consecutively enrolled in the Korea University Lymphoma Registry from 1991 to 2016. OS was compared according to the bone marrow group: without bone marrow involvement (BMA-/BMBx-), with positive results for aspiration and negative results for biopsy (BMA+/BMBx-), and with bone marrow involvement in biopsy (BMBx+). OS was assessed using the Kaplan-Meier method and multivariate analysis. Results: Of 1,735 patients, 1,326 were analyzed and 409 were excluded. In the Kaplan-Meier survival analysis, OS was significantly worse for patients in the BMBx+ group compared with those in the BMA-/BMBx- group (p < 0.001). However, there was no significant difference in OS between patients in the BMA+/BMBx- group and those in other groups (vs. BMA-/BMBx-, p = 0.163; BMBx+, p = 0.292). In multivariate analysis, by adjusting survival-related variables, the BMA+/BMBx- group showed marginal significance compared to the BMA-/BMBx- group (p = 0.081), and showed significance in the subgroup of indolent non-Hodgkin’s lymphoma patients (p = 0.003). Conclusions: This study suggested that even if there are positive results in bone marrow aspiration alone in patients with non-Hodgkin lymphoma, attention to patient characteristics, involving significance as a poor prognosis for OS, is required. (Korean J Med 2019;94:182-190)
유은상 ( Eun Sang Yu ),강은주 ( Eun Joo Kang ),김홍준 ( Hong Jun Kim ),강가원 ( Ka Won Kang ),송지영 ( Ji Young Song ),전지호 ( Ji Ho Jeon ),김준석 ( Jun Suk Kim ) 대한내과학회 2015 대한내과학회지 Vol.89 No.2
Primary cardiac osteosarcoma is extremely rare. We herein report a case involving a 31-year-old woman with a 2-week history of left upper trunk pain and hemoptysis. She was diagnosed with primary cardiac osteosarcoma with pulmonary vein obstruction and successfully treated via surgical resection and chemotherapy. (Korean J Med 2015,89:233-237)
운행기록장치 주행 데이터를 이용한 안전성 평가방법론 개발
박성민(Park, Seongmin),김윤종(Kim, Yunjong),강가원(Kang, Kawon),박준영(Park, Juneyoung),오철(Oh, Cheol) 대한토목학회 2020 대한토목학회 학술대회 Vol.2020 No.10
특정 도로 구간의 안전 성능을 평가하기 위해서는 장시간의 충분한 교통사고 자료가 필요하다. 이 문제를 극복하기 위해, 많은 연구들이 미시적 교통 시뮬레이션에서 추정된 Surrogate Safety Measure(SSM)를 이용하려고 노력해왔다. 그러나 시뮬레이션에서 개발된 네트워크가 검증되지 않으면, 현실의 교통 조건과 패턴 변화를 반영하기 위해 개발된 SSM을 채택하기 어렵다. 본 연구에서는 개별 차량 궤적 데이터 중 하나인 운행기록장치 DTG를 이용한 패턴 기반 SSM(PSSM)을 개발하는 방법을 제안하였다. PSSM은 위험 운전 행동의 패턴을 바탕으로 추정할 수 있다. 사업용 차량에서 수집한 DTG 데이터를 활용해 개별 차량의 위험 주행 패턴을 파악했다. 데이터마이닝 기법 중 하나인 랜덤포레스트를 통하여 1차적으로 변수를 선택한 후, 위험 운전 행동 빈도에 근거하여 대리 안전성능함수 (SSPF)를 추정하였다. 그 결과 급감속, 급차로변경, 급앞지르기, 급U턴이 교통사고 빈도와 관련이 있는 것으로 나타났다. SSPF를 통해 Potential for Safety Improvement(PSI)를 산출한 결과, 주로 도시와 교외지역을 연결하는 도로 구간에서 높은 PSI가 확인되었다. 이 연구의 결과는 네트워크 수준의 안전 성능을 평가하기 위해 실시간 개별 차량궤적 데이터를 채택하는 새로운 접근방식을 제공할 수 있다.
경화성 피막성 복막염 환자에서 치료 중 병발된 세균성 복막염 2예
김홍준 ( Hong Jun Kim ),김지은 ( Ji Eun Kim ),강가원 ( Ka Won Kang ),유은상 ( Eun Sang Yu ),홍유아 ( Yu Ah Hong ),박진완 ( Jin Wan Park ),권영주 ( Young Joo Kwon ) 대한내과학회 2015 대한내과학회지 Vol.89 No.3
Encapsulating peritoneal sclerosis (EPS) is a rare complication of peritoneal dialysis associated with a high mortality rate. Bacterial peritonitis (BP), a complication of EPS treatment, is uncommon, and treatments for BP are not well known. We report two patients who had undergone steroid treatment who developed BP after hemodialysis transfer. In the first case, we treated the BP with antibiotics and performed several surgical drainage procedures; however, the fluid became too thick to drain. This patient died of malnutrition and sepsis. In the second case, antibiotics and surgical enterolysis with peritonectomy were used to treat the BP. Solid food was accepted on day 7 postoperatively, and the patient was stable after 20 months. Thus, surgical enterolysis with peritonectomy may be a good treatment modality for patients with EPS and BP. (Korean J Med 2015;89:346-352)