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1086篇 您的检索式:作者名="Hoon Lee"
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1Hepatolithiasis and intrahepatic cholangiocarcinoma: A review显示文摘Although the incidence of hepatolithiasis is decreasing as the pattern of gallstone disease changes in Asia, the prevalence of hepatolithiasis is persistently high, especially in Far Eastern countries. Hepatolithiasis is an established risk factor for cholangiocarcinoma(CCA), and chronic proliferative inflammation may be involved in biliary carcinogenesis and in inducing the upregulation of cell-proliferating factors. With the use of advanced imaging modalities, there has been much improvement in the management of hepatolithiasis and the diagnosis of hepatolithiasis-associated CCA(HLCCA). However, there are many problems in managing the strictures in hepatolithiasis and differentiating them from infiltrating types of CCA. Surgical resection is recommended in cases of single lobe hepatolithiasis with atrophy, uncontrolled stricture, symptom duration of more than 10 years, and long history of biliaryenteric anastomosis. Even after resection, patients should be followed with caution for development of HL-CCA, because HL-CCA is an independent prognostic factor for survival. It is not yet clear whether hepatic resection can reduce the occurrence of subsequent HL-CCA. Furthermore, there are no consistent findings regarding prediction of subsequent HL-CCA in patients with hepatolithiasis. In the management of hepatolithiasis, important factors are the reduction of recurrence of cholangitis and suspicion of unrecognized HL-CCA.Hyo Jung Kim Jae Seon Kim Moon Kyung Joo Beom Jae Lee Ji Hoon Kim Jong Eun Yeon Jong-Jae Park Kwan Soo Byun Young-Tae Bak 2015World Journal of Gastroenterology2015,21,48:63
2Pancreatic fistula after pancreaticoduodenectomy:A comparison between the two pancreaticojejunostomy methods for approximating the pancreatic parenchyma to the jejunal seromuscular layer:Interrupted vs continuous stitches显示文摘瞄准:学习是由比较发现一种更好起作用的技术的这的目的为胰管空肠吻合术的外部层与连续的针打断了针,即在胰和空肠浆膜肌膜层的树桩实质之间的针,和其它为胰腺的漏的发生冒因素的风险。方法:在到 2004 年 10 月的时期 1997 年 1 月期间, 133 个病人与连续缝术为胰管空肠吻合术和 170 个病人的外部层与间断缝术在 pancreaticoduodenectomy 以后经历了 end-to-side 和 duct-to-mucosa 胰管空肠吻合术重建在我们由一位外科医生的机构。结果:在在诊断,胰的质地, octreotide 的使用和病理学的舞台的二个组之间没有有效差量。胰腺的管在间断缝术盒子之中并且在 10 发生在 14 个病人(11%)(6%) 在连续缝术盒子之中(P = 0.102 ) 。主要的胰腺的漏在三个间断缝术病人(2%) 和零个连续缝术病人发展了(P = 0.026 ) 。在里面多变量分析,软胰腺的一致性(机会比率, 5.5;95% 信心间隔 2.3-13.1 ) 并且胆总管癌症(机会比率, 3.7;95% CI 1.6-8.5 ) 胰腺的漏是预兆的。结论:胰腺的质地和病理是在决定 pancreaticojejunal 吻合和我们的连续缝术方法的命运与主要的胰腺的管的显著地减少的出现被执行的最重要的因素。在结论,连续缝术方法在执行 duct-to-mucosa 胰管空肠吻合术更可行、更安全。Seung Eun Lee Sung Hoon Yang Jin-Young Jang Sun-Whe Kim 2007World Journal of Gastroenterology2007,13,40:31
3Small sphincterotomy combined with endoscopic papillary large balloon dilation versus sphincterotomy显示文摘AIM:To compare small sphincterotomy combined with endoscopic papillary large balloon dilation(SES+ ELBD)and endoscopic sphincterotomy(EST)for large bile duct stones. METHODS:We compared prospectively SES+ELBD (group A,n=27)with conventional EST(group B, n=28)for the treatment of large bile duct stones(≥ 15 mm).When the stone could not be removed with a normal basket,mechanical lithotripsy was performed. We compared the rates of complete stone removal with one session and application of mechanical lithotripsy. RESULTS:No significant differences were observed in the mean largest stone size(A:20.8 mm,B:21.3 mm), bile duct diameter(A:21.4 mm,B:20.5 mm),number of stones(A:2.2,B:2.3),or procedure time(A:18 min, B:19 min)between the two groups.The rates of complete stone removal with one session was 85%in group A and 86%in group B(P=0.473).Mechanical lithotripsy was required for stone removal in nine of 27 patients(33%)in group A and nine of 28 patients (32%,P=0.527)in group B.CONCLUSION:SES+ELBD did not show significant benefits compared to conventional EST,especially for the removal of large(≥15 mm)bile duct stones.Hyun Gun Kim Young Koog Cheon Young Deok Cho Jong Ho Moon Do Hyun Park Tae Hoon Lee Hyun Jong Choi Sang-Heum Park Joon Seong Lee Moon Sung Lee 2009World Journal of Gastroenterology2009,15,34:34
4Gastric cancer surgery in cirrhotic patients: Result of gastrectomy with D2 lymph node dissection显示文摘AIM: To explore the feasibility of performing gastrectomy with D2 lymphadenectomy in gastric cancer patients with liver cirrhosis.METHODS: A total of 7 178 patients were admitted with a diagnosis of liver cirrhosis from January 1993 to December 2003. We reviewed the records of 142 patients who were diagnosed with liver cirrhosis and gastric adenocarcinoma during the same period. Gastrectomy with D2 lymph node dissection for carcinoma of the stomach was performed in 94 patients with histologically proven hepatic cirrhosis.RESULTS: All but 12 patients were classified as Child's class A. Only 35 patients (37.2%) were diagnosed with cirrhosis before operation. Seventy-three patients underwent a subtotal gastrectomy (77.7%) and 21 patients (22.3%)underwent a total gastrectomy, each with D2 or more lymph node dissection. Two patients (3.8%) who had prophylactic intra-operative drain placement, died of postoperative complications from hepatorenal failure with intractable ascites. Thirty-seven patients (39.4%) experienced postoperative complications. The extent of gastric resection did not influence the morbidity whereas serum aspartate aminotransferase level (P = 0.011) and transfusion did (P= 0.008). The most common postoperative complication was ascites (13.9%) followed by wound infection (10.6%).CONCLUSION: We concluded that the presence of compensated cirrhosis, i.e. Child class A, is not a contraindication against gastrectomy with D2 or more lymph node dissection, when curative resection for gastric cancer is possible. Hepatic reserve and meticulous hemostasis are the likely determinants of operative prognosis.Jun Ho Lee Junuk Kim Jae Ho Cheong Woo Jin Hyung Seung Ho Choi Sung Hoon Noh 2005World Journal of Gastroenterology2005,11,30:25
5Endoscopic removal of gastric ectopic pancreas:An initial experience with endoscopic submucosal dissection显示文摘AIM:To evaluate the therapeutic usefulness and safety of endoscopic resection in patients with gastric ectopic pancreas.METHODS:A total of eight patients with ectopic pancreas were included.All of them underwent endoscopic ultrasonography before endoscopic resection.Endo-scopic resection was performed by two methods:endo-scopic mucosal resection(EMR)by the injection-and-cut technique or endoscopic mucosal dissection(ESD).RESULTS:We planned to perform EMR in all eight cases but EMR was successful in only four cases.In the other four cases,saline spread into surrounding normal tissues and the lesions becameattened,which made it impossible to remove them by EMR.Inthose four cases,we performed ESD and removed the lesions without any complications.CONCLUSION:If conventional EMR is difficult to remove gastric ectopic pancreas,ESD is a feasible alternative method for successful removal.Dong Yup Ryu Gwang Ha Kim Do Youn Park Bong Eun Lee Jae Hoon Cheong Dong Uk Kim Hyun Young Woo Jeong Heo Geun Am Song 2010World Journal of Gastroenterology2010,16,36:24
6How good is cola for dissolution of gastric phytobezoars?显示文摘AIM:To evaluate the efficacy of cola treatment for gastric phytobezoars,including diospyrobezoars.METHODS:A total of 17 patients(range:48 to 78 years) with symptomatic gastric phytobezoars treated with cola and adjuvant endoscopic therapy were reviewed.Three liters of cola lavage(10 cases) or drink(7 cases) were initially used,and then endoscopic fragmentation was done for the remnant bezoars by using a lithotripsy basket or a polypectomy snare.The overall success of dissolving a gastric phytobezoars with using three liters of cola and the clinical and endoscopic findings were compared retrospectively between four cases of complete dissolution by using only cola and 13 cases of partial dissolution with cola.RESULTS:After 3 L of cola lavage or drinking,a complete dissolution of bezoars was achieved in four patients(23.5%),while 13 cases(76.5%) were only partially dissolved.Phytobezoars(4 of 6 cases) were observed more frequently than diospyrobezoars(0 of 11) in the group that underwent complete dissolution(P = 0.006).Gender,symptom duration,size of bezoar and method of cola administration were not significantly different between the two groups.Twelve of 13 patients with residual bezoars were completely treated with a combination of cola and endoscopic fragmentation.CONCLUSION:The rate of complete dissolution with three liters of cola was 23.5%,but no case of diospyrobezoar was completely dissolved using this method.However,pretreatment with cola may be helpful and facilitate endoscopic fragmentation of gastric phytobezoars.Beom Jae Lee Jong-Jae Park Hoon Jai Chun Ji Hoon Kim Jong Eun Yeon Yoon Tae Jeen Jae Seon Kim Kwan Soo Byun Sang Woo Lee Jae Hyun Choi Chang Duck Kim Ho Sang Ryu Young-Tae Bak 2009World Journal of Gastroenterology2009,15,18:22
7Primary endoscopic approximation suture under cap-assisted endoscopy of an ERCP-induced duodenal perforation显示文摘Duodenal perforation during endoscopic retrograde cholangiopancreatography(ERCP) is a rare complication,but it has a relatively high mortality risk.Early diagnosis and prompt management are key factors for the successful treatment of ERCP-related perforation.The management of perforation can initially be conservative in cases resulting from sphincterotomy or guide wire trauma.However,the current standard treatment for duodenal free wall perforation is surgical repair.Recently,several case reports of endoscopic closure techniques using endoclips,endoloops,or fully covered metal stents have been described.We describe four cases of iatrogenic duodenal bulb or lateral wall perforation caused by the scope tip that occurred during ERCP in tertiary referral centers.All the cases were simply managed by endoclips under transparent capassisted endoscopy.Based on the available evidence and our experience,endoscopic closure was a safe and feasible method even for duodenoscope-induced perforations.Our results suggest that endoscopists may be more willing to use this treatment.Tae Hoon Lee Byoung Wook Bang Jee In Jeong Hyung Gil Kim Seok Jeong Seon Mee Park Don Haeng Lee Sang-Heum Park Sun-Joo Kim 2010World Journal of Gastroenterology2010,16,18:19
8Nitric oxide synthase and heme oxygenase expressions in human liver cirrhosis显示文摘瞄准:门静脉高血压是肝肝硬化的普通复杂并发症。肝内压力能以几个方法被提高。从内脏的内脏影响脉管系统, vasoconstrictors 的增加和增加的循环进门静脉系统的反常建筑学都可以作出贡献。因而内长的血管扩张药也许能减轻高血压。我们因此试图调查内长的血管扩张药的层次,氮的氧化物(没有) 并且通过氮的氧化物 synthase (NOS ) 的表示的一氧化碳(公司) 并且他我氧合酶(惊讶) 。方法:肝脏硬化症(n=20 ) 并且非肝脏硬化症(n=20 ) 肝从经历了外科的病人被获得。NOS 的各种各样的 isoforms 的 mRNA 和蛋白质表情并且惊讶用竞争 PCR,西方的污点和免疫组织化学被检验。结果:当内皮 NOS (eNOS ) 在硬变肝是起来调整的时,在可诱导的 NOS (i NOS ) 或神经元 NOS (nNOS ) 表情没有重要变化。附随地, caveolin-1, eNOS 的一个确定的下面管理者,是起来调整的。可诱导的 HO-1 和组成的 HO-2 被发现在不同本地化在硬变肝虽然显示出增加的表示。结论:NOS 表示力量的差别由于他们在在肝硬化的病理维持肝动态平衡或参与的不同角色。在高血压的肝以内的纯粹的应力可以导致 eNOS 的增加的表示。接着, caveolin-1 也被增加。这是否对进一步的肝硬化用作一个防御机理或是肝硬化的后果,是还未知的。HO-1 和 HO-2 的提高的表示建议公司可以微弱地作为血管扩张药虽然在它的角色补偿。它是可能的那个公司并且不在肝以内有平行或协调的功能并且可以在门静脉高血压的病理生理学反对地工作。Beatrice J Goh Bee Tee Tan Wei Min Hon Kang Hoe Lee Hoon Eng Khoo 2006World Journal of Gastroenterology2006,12,4:19
9Management of the complications of endoscopic submucosal dissection显示文摘Endoscopic submucosal dissection(ESD) is currently widely accepted as a standard treatment option for early gastrointestinal neoplasms in Korea.However,ESD has technical difficulties and a longer procedure time than conventional endoscopic resection.So it may have a higher risk of complications than conventional endoscopic resection techniques.We,the ESD study group of Korean Society of Gastrointestinal Endoscopy,have experienced many complications,mostly treated by endoscopic or conservative management.Here,we introduce and share our experiences for managementof post ESD complications and review published papers on the topic.Seong Hwan Kim Jeong Seop Moon Young Hoon Youn Ki Myung Lee Sung Joon Lee 2011World Journal of Gastroenterology2011,17,31:19
10Treatment strategies using adefovir dipivoxil for individuals with lamivudine-resistant chronic hepatitis B显示文摘AIM:To investigate retrospectively the long-term efficacy of various treatment strategies using adefovir dipivoxil(adefovir) in patients with lamivudine-resistant chronic hepatitis B.METHODS:We included 154 consecutive patients in two treatment groups:the 'add-on' group(n = 79),in which adefovir was added to ongoing lamivudine treatment due to lamivudine resistance,and the 'switch/combination' group(n = 75),in which lamivudine was first switched to adefovir and then re-added later as needed.The 'switch/combination' group was then divided into two subgroups depending on whether participants followed(group A,n = 30) or violated(group B,n = 45) a proposed treatment strategy that determined whether to add lamivudine based on the serum hepatitis B virus(HBV) DNA levels(< 60 IU/mL or not) after 6 mo of treatment(roadmap concept).RESULTS:The cumulative probability of virologic response(HBV DNA < 60 IU/mL) was higher in group A than in the 'add-on' group and in group B(P < 0.001).In contrast,the cumulative probability of virologic breakthrough was lower in the 'add-on' group than in group B(P = 0.002).Furthermore,the risk of virologic breakthrough in the multivariate analysis was significantly lower in the 'add-on' group than in group A(hazard ratio = 0.096;95%CI,0.015-0.629;P = 0.015).CONCLUSION:The selective combination of adefovir with lamivudine based upon early treatment responses increased the odds of virologic breakthrough relative to the use of uniform combination therapy from the beginning of treatment.Tae Jung Yun Jin Yong Jung Chang Ha Kim Soon Ho Um Hyonggin An Yeon Seok Seo Jin Dong Kim Hyung Joon Yim Bora Keum Yong Sik Kim Yoon Tae Jeen Hong Sik Lee Hoon Jai Chun Chang Duck Kim Ho Sang Ryu 2012World Journal of Gastroenterology2012,18,47:19
11Prediction models of hepatocellular carcinoma development in chronic hepatitis B patients显示文摘Chronic hepatitis B virus(HBV) infection is a major cause of cirrhosis and hepatocellular carcinoma(HCC). Applying the same strategies for antiviral therapy and HCC surveillance to all chronic hepatitis B(CHB) patients would be a burden worldwide. To properly manage CHB patients, it is necessary to identify and classify the risk for HCC development in such patients. Several HCC risk scores based on risk factors such as cirrhosis, age, male gender, and high viral load have been used, and have negative predictive values of ≥ 95%. Most of these have been derived from, and internally validated in, treatment-na?ve Asian CHB patients. Herein, we summarized various HCC prediction models, including IPM(Individual Prediction Model), CU-HCC(Chinese University-HCC), GAG-HCC(Guide with Age, Gender, HBV DNA, Core Promoter Mutations and Cirrhosis-HCC), NGM-HCC(NomogramHCC), REACH-B(Risk Estimation for Hepatocellular Carcinoma in Chronic Hepatitis B), and Page-B score. To develop a noninvasive test of liver fibrosis, we also introduced a new scoring system that uses liver stiffness values from transient elastography, including an LSM(Liver Stiffness Measurement)-based model, LSM-HCC, and mR EACH-B(modified REACH-B).Hye Won Lee Sang Hoon Ahn 2016World Journal of Gastroenterology2016,22,37:16
12Diagnostic value of maximal-outer-diameter and maximal-mural-thickness in use of ultrasound for acute appendicitis in children显示文摘AIM: To evaluate the maximal-outer-diameter (MOD) and the maximal-mural-thickness (MMT) of the appendix in children with acute appendicitis and to determine their optimal cut-off values to diagnose acute appendicitis. METHODS: In total, 164 appendixes from 160 children between 1 and 17 years old (84 males, 76 females; mean age, 7.38 years) were examined by high-resolution abdominal ultrasound for acute abdominal pain and the suspicion of acute appendicitis. We measured the MOD and the MMT at the thickest point of the appendix. Patients were categorized into two groups according to their medical records: patients who had surgery (surgical appendix group) and patients who did not have surgery (non-surgical appendix group). Data were analyzed by MedCalc v.9.3. The rank sum test (Mann-Whitney test) was used to evaluate the difference in the MOD and the MMT between the two groups. ROC curve analysis was used to determine the optimal cut-off value of the MOD and the MMT on diagnosis of acute appendicitis. RESULTS: There were 121 appendixes (73.8%) in the non-surgical appendix group and 43 appendixes (26.2%) in the surgical appendix group. The median MOD differed significantly between the two groups (0.37 cm vs 0.76 cm, P < 0.0001), and the median MMT also differed (0.15 cm vs 0.33 cm, P < 0.0001). The optimal cut-off value of the MOD and the MMT for diagnosis of acute appendicitis in children was > 0.57 cm (sensitivity 95.4%, specificity 93.4%) and > 0.22 cm (sensitivity 90.7%, specificity 79.3%), respectively. CONCLUSION: The MOD and the MMT are reliable criteria to diagnose acute appendicitis in children. An MOD > 0.57 cm and an MMT > 0.22 cm are the optimal criteria.Bo-Kyung Je Sung-Bum Kim Seung Hwa Lee Ki Yeol Lee Sang Hoon Cha 2009World Journal of Gastroenterology2009,15,23:14
13Loss of CDX2 expression is associated with poor prognosis in colorectal cancer patients显示文摘AIM:To investigate the clinicopathologic characteristics and prognostic implications associated with loss of CDX2 expression in colorectal cancers(CRCs).METHODS:We immunohistochemically evaluated CDX2 expression in 713 CRCs and paired our findings to clinicopathologic and molecular characteristics of each individual.Endpoints included cytokeratin 7 and CK20 expression,microsatellite instability,Cp G island methylator phenotype,and KRAS and BRAF mutation statuses.Univariate and multivariate survival analysis was performed to reveal the prognostic value of CDX2 downregulation.RESULTS:CDX2 expression was lost in 42(5.9%) patients.Moreover,loss of CDX2 expression was associated with proximal location,infiltrative growth,advanced T,N,M and overall stage.On microscopic examination,loss of CDX2 expression was associated with poor differentiation,increased number of tumor-infiltrating lymphocytes,luminal serration and mucin production.Loss of CDX2 expression was also associated with increased CK7 expression,decreased CK20 expression,Cp G island methylator phenotype,microsatellite instability and BRAF mutation.In a univariate survival analysis,patients with loss of CDX2 expression showed worse overall survival(P < 0.001) and progression-free survival(P < 0.001).In a multivariate survival analysis,loss of CDX2 expression was an independent poor prognostic factor of overall survival [hazard ratio(HR) = 1.72,95%CI:1.04-2.85,P = 0.034] and progression-free survival(HR = 1.94,95%CI:1.22-3.07,P = 0.005).CONCLUSION:Loss of CDX2 expression is associated with aggressive clinical behavior and can be used as a prognostic marker in CRCs.Jeong Mo Bae Tae Hun Lee Nam-Yun Cho Tae-You Kim Gyeong Hoon Kang 2015World Journal of Gastroenterology2015,21,5:14
14Management of entecavir-resistant chronic hepatitis B with adefovir-based combination therapies显示文摘AIM: To evaluate the long-term efficacy adefovir(ADV)-based combination therapies in entecavir(ETV)-resistant chronic hepatitis B(CHB) patients. METHODS: F i fty CHB pat ient s wi t h genotypic resistance to ETV at 13 medical centers in South Korea were included for the analysis. All the patients received rescue therapy with the combination of ADV plus ETV(ADV/ETV,n = 23) or ADV plus lamivudine(LMV)(ADV/LMV,n = 27) for more than 12 mo. Patients were monitored at least every 3-4 mo during ADV-based combination therapy by clinical examination as well as biochemical and virological assessments. Hepatitis B virus(HBV) DNA levels were measured by realtime PCR and logarithmically transformed for analysis. Cumulative rates of virologic response(VR; HBV DNA < 20 IU/m L) were calculated using the Kaplan-Meier method,and the difference was determined by a logrank test. Multivariate logistic regression and Cox proportional hazards models were used to identify independent risk factors significantly associated with short-term and long-term VR,respectively.RESULTS: Baseline median HBV DNA levels were 5.53(2.81-7.63) log10 IU/m L. The most commonly observed ETV genotypic mutation sites were rt184 and rt202. Patients were treated for a median of 27(12-45) mo. Overall,cumulative VR rates at 6,12,24,and 36 mo were 26%,36%,45%,and 68%,respectively. Patients treated with the ADV/ETV combination showed higher cumulative VR rates(35%,43%,65%,and 76%,respectively) than those with the ADV/LAM combination(18%,30%,30%,and 62%,respectively; P = 0.048). In the multivariate analysis,low baseline HBV DNA levels(< 5.2 log10 IU/m L) and initial virologic response at 3 mo(IVR-3; HBV DNA < 3.3 log10 IU/m L after 3 mo) were independent predictive factors for VR. Patients with favorable predictors achieved cumulative VR rates up to 90% at 36 mo. During the same period,the cumulative incidence of virologic breakthrough was as low as 6% in patients with the both favorable predictors.CONCLUSION: If tenofovir is not available,ADV/ETV combination could be considered in ETV-resistant patients with low HBV DNA titers,and may becontinued if IVR-3 is achieved.Hyoung Su Kim Hyung Joon Yim Myoung Kuk Jang Ji Won Park Sang Jun Suh Yeon Seok Seo Ji Hoon Kim Bo Hyun Kim Sang Jong Park Sae Hwan Lee Sang Gyune Kim Young Seok Kim Jung Il Lee Jin-Woo Lee In Hee Kim Tae Yeob Kim Jin-Wook Kim Sook-Hyang Jeong Young Kul Jung Hana Park Seong Gyu Hwang 2015World Journal of Gastroenterology2015,21,38:13
15New magnifying endoscopic classification for superficial esophageal squamous cell carcinoma显示文摘AIM To assess the accuracy of a new magnifying endoscopy(ME)classification for predicting depth of invasion of superficial esophageal squamous cell carcinoma(SESCC).METHODS This study included a total of 70 lesions in 69 patients with SESCC who underwent ME with narrow-band imaging(ME-NBI)before resection from August 2010 to July 2016.Accuracy of ME-NBI for predicting depth of invasion of SESCC was analyzed by using a new ME classification proposed by the Japan Esophageal Society(JES),and interobserver agreement was assessed.RESULTS Overall accuracy of ME-NBI for estimating depth of invasion of SESCC was 78.6%.Sensitivity and specificity of type B1 for tumors limited to the epithelial layer(m1)or invading into the lamina propria(m2)were 71.4%and 100%,respectively.Sensitivity and specificity of type B2 for tumors invading into the muscularis mucosa(m3)or superficial submucosa(≤200μm,sm1)were94.4%and 73.1%,respectively,while those of type B3for tumors invading into the deep submucosa(>200μm,sm2)were 75.0%and 97.8%,respectively.Interobserver agreement was excellent(κ=0.86,95%CI:0.76-0.95).CONCLUSION The recently developed JES ME classification is useful for predicting depth of invasion of SESCC,with reliable interobserver agreement.Su Jin Kim Gwang Ha Kim Moon Won Lee Hye Kyung Jeon Dong Hoon Baek Bong Eun Lee Geun Am Song 2017World Journal of Gastroenterology2017,23,24:13
16Quantification of HBsAg:Basic virology for clinical practice显示文摘Hepatitis B surface antigen (HBsAg) is produced and secreted through a complex mechanism that is still not fully understood. In clinical fields, HBsAg has long served as a qualitative diagnostic marker for hepatitis B virus infection. Notably, advances have been made in the development of quantitative HBsAg assays, which have allowed viral replication monitoring, and there is an opportunity to make maximal use of quantitative HBsAg to elucidate its role in clinical fields. Yet, it needs to be underscored that a further understanding of HBsAg, not only from clinical point of view but also from a virologic point of view, would enable us to deepen our insights, so that we could more widely expand and apply its utility. It is also important to be familiar with HBsAg variants and their clinical consequences in terms of immune escape mutants, issues resulting from overlap with corresponding mutation in the P gene, and detection problems for the HBsAg variants. In this article, we review current concepts and issues on the quantification of HBsAg titers with respect to their biologic nature, method principles, and clinically relevant topics.Jung Min Lee Sang Hoon Ahn 2011World Journal of Gastroenterology2011,17,3:12
17Prognostic value of inflammation-based markers in patients with pancreatic cancer administered gemcitabine and erlotinib显示文摘AIM: To evaluate the value of systemic inflammationbased markers as prognostic factors for advanced pancreatic cancer(PC). METHODS: Data from 82 patients who underwent combination chemotherapy with gemcitabine and erlotinib for PC from 2011 to 2014 were collected retrospectively. Data that included the neutrophil-to-lymphocyte ratio(NLR), the platelet-to-lymphocyte ratio, and the C-reactive protein(CRP)-to-albumin(CRP/Alb) ratio were analyzed. Kaplan-Meier curves, and univariate and multivariate Cox proportional hazards regression analyses were used to identify the prognostic factors associated with progression-free survival(PFS) and overall survival(OS). RESULTS: The univariate analysis demonstrated the prognostic value of the NLR(P = 0.049) and the CRP/Alb ratio(P = 0.047) in relation to PFS, and a positiverelationship between an increase in inflammation-based markers and a poor prognosis in relation to OS. The multivariate analysis determined that an increased NLR(hazard ratio = 2.76, 95%CI: 1.33-5.75, P = 0.007) is an independent prognostic factor for poor OS. There was no association between the PLR and the patients' prognoses in those who had received chemotherapy that comprised gemcitabine and erlotinib in combination. The Kaplan-Meier method and the log-rank test determined significantly worse outcomes in relation to PFS and OS in patients with an NLR > 5 or a CRP/Alb ratio > 5.CONCLUSION: Systemic inflammation-based markers, including increases in the NLR and the CRP/Alb ratio, may be useful for predicting PC prognoses.Jae Min Lee Hong Sik Lee Jong Jin Hyun Hyuk Soon Choi Eun Sun Kim Bora Keum Yeon Seok Seo Yoon Tae Jeen Hoon Jai Chun Soon Ho Um Chang Duck Kim 2016World Journal of Gastrointestinal Oncology2016,8,7:12
18Clinicopathological features and prognosis of combined hepatocellular carcinoma and cholangiocarcinoma after surgery显示文摘BACKGROUND: Combined hepatocellular carcinoma and cholangiocarcinoma (cH CC-CC) is a rare subtype of primary liver cancer consisting of both hepatocellular carcinoma (HCC)and cholangiocarcinoma (CC). Because of the rarity of this tumor its feature is poorly understood. The present study aimed to evaluate the clinicopathological features and long-term prognosis of patients with cH CC-CC after surgery and to compare with those of the patients with stage-matched HCC and CC.METHODS: The clinicopathological features of the patients who underwent surgery for cH CC-CC at our center during the period of 2001-2010 were retrospectively analyzed and compared with those of stage-matched HCC and CC patients Cancer staging was performed according to the AJCC Cancer Staging Manual (6th ed.). Overall survival and disease-free survival were compared among the groups and prognostic factors of cH CC-CC were evaluated.RESULTS: Significant differences were observed in clinico pathological features among 42 patients with cH CC-CC, 90patients with HCC and 45 patients with CC. Similar to HCC patients, cH CC-CC patients had frequent hepatitis B virus antigen positivity, microscopic vessel invasion, cirrhosis and high level of serum alpha-fetoprotein. Similar to CC patients, cH CC-CC patients showed increased bile duct invasion and decreased capsule. The 1-, 3-, and 5-year overall survival and disease free survival of patients with cH CC-CC were not significantly different from those with stage-matched patients with CC;but significantly poorer than those with HCC. In subanalysis of patients with stage II, the overall survival in patients with cH CC-CC or CC was significantly poorer than that in patients , with HCC. We did not find the difference in patients with other stages. Univariate analysis of overall and disease-free survival of patients with cH CC-CC showed that the vascular invasion and intrahepatic metastasis were the significant predictive factors.CONCLUSION: Patients with cH CC-CC showed similar clinico- pathological features as those with HCC or CC, and patients with cH CC-CC or CC had a poorer prognosis compared with those with HCC, especially at matched stage II..Seung Duk Lee Sang-Jae Park Sung-Sik Han Seong Hoon Kim Young-Kyu Kim Soon-Ae Lee Young Hwan Ko Eun Kyung Hong 2014Hepatobiliary & Pancreatic Diseases International2014,13,6:11
19Tailoring strength-ductility balance of caliber-rolled AZ31 Mg alloy through subsequent annealing显示文摘Recently,multi-pass caliber rolling has been shown to be effective for Mg alloys.This study investigated the effect of subsequent annealing on the mechanical properties of a caliber-rolled AZ31 Mg alloy to modulate the strength-ductility relationship.This annealing gave rise to different trends in mechanical properties depending on the temperature regime.Low-temperature annealing(T≤473 K)exhibited a typical trade-off relationship,where an increase in annealing temperature resulted in increased ductility but decreased strength and hardness.Such a heat treatment did not degrade the high strength-ductility balance of the caliber-rolled alloy,suggesting that the mechanical properties could be tailored for different potential applications.In contrast,high-temperature annealing(T>473 K)caused a simultaneous deterioration in strength,hardness,and ductility with increasing annealing temperature.These differences are discussed in terms of the varying microstructural features under the different investigated annealing regimes.Taein Kong Byung Je Kwak Jonghyun Kim Jeong Hun Lee Sung Hyuk Park Ji Hoon Kim Young Hoon Moon Hyun Sik Yoon Taekyung Lee 2020Journal of Magnesium and Alloys2020,8,1:10
20Nanodendrites of platinum-group metals for electrocatalytic applications显示文摘Developing highly efficient and durable catalysts for future electrochemical and energy applications is one of the main subjects of current studies in renewable energy generation.In the past several years,researchers have developed Pt-based ,alloy electrocatalyst nanomaterials that exhibit promising electrocatalytic properties for various electrochemical applications.The efficient structural and morphological control of Pt-based alloy materials plays a decisive role in achieving these enhanced electrocatalytic properties.The present review article emphasizes the recent progress and important developments in the synthesis and electrocatalytic applications of Pt-group-based nanodendrite materials.The following review will help the exploration and development of better catalysts for practical applications and aims to elucidate the nanodendrite structure of Pt-group metals.Nitin K.Chaudhari Jinwhan Joo Hyuk-bu Kwon Byeongyoon Kim Ho Young Kim Sang Hoon Joo Kwangyeol Lee 2018Nano Research2018,11,12:10
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