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돼지에 있어 인공혈관으로 대정맥 재건을 통한 자가 부분 간이식 동물 실험 모델
서형일(Hyung-Il Seo),심문섭(Mun Sup Sim),김동헌(Dong-Heon Kim),전태용(Tae Yong Jeon),조홍재(Hong-Jae Jo),권재영(Jae Young Kwon),김해규(Hae Kyu Kim),김해영(Hae Young Kim) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.74 No.4
Purpose: Experimental animal models are useful training methods for liver transplantation, despite of ethical issues. The aims of this study are to examine the technical feasibility of living donor liver transplantation in pigs and to address the ethical problems. Methods: Eight pigs were used in this experiment. The pig liver was divided via a left hemi-hepatectomy without inflow occlusion. The GORE-TEX<SUP>R</SUP> Vascular Graft was used as a replacement for the inferior vena cava during the graft. After the bench technique, the remnant right lobe of the pig was removed. During the anhepatic phase, an abdominal aortic clamp in combination with general hypothermia was applied, instead of using a conventional bypass procedure. Results: Anhepatic time was 41.3±7.0 min and cold ischemic time was 200.3±29.4 min. The 1<SUP>st</SUP>, 4<SUP>th</SUP>, and 8<SUP>th</SUP> pig died because of declamping shock and arrhythmia on releasing the abdominal aortic clamp. Three pigs had five postoperative complications: pneumonia, gastrointestinal bleeding, IVC thrombosis, portal vein thrombosis, and bile duct stricture. The 6th pig received a hepaticojejunostomy due to stricture of the anastomosis site at 37 days after transplantation. Conclusion: Pigs are economically and ethically more convenient compared to primate models. For auto-liver transplantation, no immunotherapy was needed. The pigs lived relatively long, allowing operative faults to be detected and studied. This experimental model will be useful training for living donor liver transplantation.
Hyung Il Seo(서형일) 한국간담췌외과학회 2009 한국간담췌외과학회지 Vol.13 No.2
Collision tumors represent the coexistence of two adjacent but histologically distinct tumors in an organ. Collision tumors have been identified in various organs, but they are rare in liver. We present a rare case of a 57-year-old man, who was hospitalized for the removal of a liver mass (S5/6 segmentectomy), that was probably a hepatocellular carcinoma. The eventual pathology examination revealed a collision tumor composed of a hepatocellular carcinoma and an undifferentiated sarcoma. Because the tumor recurred 2 months after the operation, reoperation (right hemicolectomy and tumorectomy) was performed. In the 2nd month following the second operation we found multiple liver metastases, chest metastasis and abdominal cavity metastasis. To our knowledge this is the first case of a hepatic collision tumor that was composed of a hepatocellular carcinoma and an undifferentiated sarcoma. Herein, we report the case of a hepatic collision tumor and briefly review the literature.
유방 사분역절제술 후 즉각적인 광배근 피판술에서 장액종 형성 예방에 있어 누빔 봉합술(Quilting)의 효과
이석원(Seok-Won Lee),서형일(Hyung-Il Seo),배영태(Young-Tae Bae) 대한외과학회 2008 Annals of Surgical Treatment and Research(ASRT) Vol.74 No.3
Purpose: Latissimus dorsi myocutaneous flap (LDMCF) is a commonly used technique for breast reconstruction following breast-conserving surgery. However, this technique has a high incidence of donor site seroma. The aim of this study is to evaluate the effect of donor-site quilting on seroma formation. Methods: A retrospective review of 95 patients who underwent immediate breast reconstruction with LDMCF from May of 2006 through February of 2007 was performed. Patients were divided into Group A, in which only a closed suction drain was used, and Group B, in which quilting and a closed suction drain were used. The outcome measures were age, body mass index (BMI), mastectomy volume, duration of drain, total volume of postoperative seroma, length of hospital stay, and incidence of postoperative aspiration. Results: In Group B, the total amount of seroma, duration of drain, and length of hospital stay were significantly reduced (P<0.05). However, the incidence of postoperative aspiration was not different between Group A and Group B (P=0.06). Conclusion: The quilting technique reduces the volume of postoperative seroma and may help prevent of seroma after LDMCF.
Axillary LN meta가 있는 유방암에서 액와 림프절의 FDG uptake가 가지는 임상적 의미
고수희 ( Soo Hee Go ),서형일 ( Hyung Il Seo ),이지연 ( Jee Yeon Lee ),정윤주 ( Youn Joo Jung ) 대한임상종양학회 2010 Korean Journal of Clinical Oncology Vol.6 No.2
Purpose: 18F-Fluorodeoxyglucose Positron Emission Tomography-Computed Tomography(18F-FDG PET/CT) has been recommended as a diagnostic modality for preoperative staging of breast cancer. But, the information for FDG uptake on axillary lymph node(ALN) is not sufficient. Authors investigated the FDG uptake on ALN in preoperative 18F-FDG PET/CT and tumor characteristics to figure out their association and its clinical significance. Materials and Methods: From Jan. to Dec. 2007, 176 patients had been performed preoperative 18F-FDG PET/CT. Only sixty-five cases were confirmed as ALN metastasis in pathologic report. Thirty-one patients with high FDG uptake of ALN (SUVmax>1.0) and thirty-four with low FDG uptake (SUVmax≤1.0) in 18F-FDG PET/CT were classified as group A and B, respectively. Results: The FDG uptake of ALN showed significant relationship with poor prognostic factors of primary tumor(worse histologic grade, negativity of estrogen and progesterone receptor, positivity of p53 and c-erbB2 gene, tumor necrosis, lymphovascular invasion) and ALN metastasis. In multivariate analysis, FDG uptake of ALN showed larger tumor size (p=0.001), higher Ki-67 (p=0.004), bigger and more metastatic ALN (p=0.017, <0.001) compared to low FDG uptake of ALN. The cut-off values of high FDG uptake were 1.85 cm of primary tumor size, 17.5% of Ki-67, 2.5 and 0.95 cm of number and size of metastatic ALN. Conclusion: The most valuable sensitivity and specificity of FDG uptake in metastatic ALN were shown when the number and size of ALN was more than 3 or 0.95 cm and they would be large enough to perform ultrasonographyguided biopsy. We recommend preoperative ALN biopsy for the cases of FDG uptake on ALN in preoperative 18FFDG PET/CT and the sentinel lymph node biopsy might be skipped if metastasis is confirmed on biopsy.