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| 1 | Treatment 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 | 2012 | World Journal of Gastroenterology2012，18，47： | 19 |
| 2 | Prognostic 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 | 2016 | World Journal of Gastrointestinal Oncology2016，8，7： | 12 |
| 3 | Current status of endoscopic submucosal dissection for the management of early gastric cancer:A Korean perspective显示文摘The early diagnosis of gastric cancer allows patients and physicians to pursue the option of endoscopic resection,which is significantly less invasive than conventional surgical resection.In Korea,the use of endoscopic submucosal dissection(ESD) has been increasing,and many reports on ESD have been published.In addition,Korean gastroenterologists from several hospitals performing ESD have conducted formal meetings to discuss useful information regarding ESD.Here,we discuss the Korean experience with ESD,including outcomes and prospects of endoscopic treatments. | Hoon Jai Chun Bora Keum Ji Hyun Kim Sang Young Seol | 2011 | World Journal of Gastroenterology2011，17，21： | 10 |
| 4 | Endoscopic submucosal tunnel dissection salvage technique for ulcerative early gastric cancer显示文摘Endoscopic submucosal dissection is an effective treatment modality for early gastric cancer(EGC), though the submucosal fibrosis found in ulcerative EGC is an obstacle for successful treatment. This report presents two cases of ulcerative EGC in two males, 73- and 80-year-old, with severe fibrosis. As endoscopic ultrasonography suggested that the EGCs had invaded the submucosal layer, the endoscopic submucosal tunnel dissection salvage technique was utilized for complete resection of the lesions. Although surgical gastrectomy was originally scheduled, the two patients had severe coronary heart disease, and surgeries were refused because of the risks associated with their heart conditions. The endoscopic submucosal tunnel dissection salvage technique procedures described in these cases were performed under conscious sedation, and were completed within 30 min. The complete en bloc resection of EGC using endoscopic submucosal tunnel dissection salvage technique was possible with a free resection margin, and no other complications were noted during the procedure. This is the first known report concerning the use of the endoscopic submucosal tunnel dissection salvage technique salvage technique for treatment of ulcerative EGC. We demonstrate that endoscopic submucosal tunnel dissection salvage technique it is a feasible method showing several advantages over endoscopic submucosal dissection for cases of EGC with fibrosis. | Hyuk Soon Choi Hoon Jai Chun Min Ho Seo Eun Sun Kim Bora Keum Yeon Seok Seo Yoon Tae Jeen Hong Sik Lee Soon Ho Um Chang Duck Kim Ho Sang Ryu | 2014 | World Journal of Gastroenterology2014，20，27： | 8 |
| 5 | Comparison of sequential and 7-,10-,14-d triple therapy for Helicobacter pylori infection显示文摘AIM:To compare the effectiveness of sequential therapy for Helicobacter pylori(H.pylori) infection with that of triple therapy of varying durations.METHODS:The 460 patients enrolled in this study had H.pylori-associated gastritis or a gastric or duodenal ulcer.After screening,H.pylori-infected patients were randomly assigned to receive either conventional triple therapy for 7,10 or 14 d,or a new 10-d sequential therapy.Each of the 4 treatment groups included 115 patients.The outcomes of eradication therapy were assessed 4 wk after treatment by the urea breath test and histology.RESULTS:The overall eradication rate was 81.0%,and eradication rates were 75.7% for 7-d conventional triple therapy,81.9% for 10-d conventional triple therapy,84.4% for 14-d conventional triple therapy,and 82.0% for 10-d sequential therapy.Neither intention-to-treat analysis nor per protocol analysis showed significant differences in eradication rates using sequential therapy or the standard triple therapy(P = 0.416 and P = 0.405,respectively).CONCLUSION:There are no significant differences between 10-d sequential eradication therapy for H.pylori and any duration of standard triple treatment in Korean patients. | Hyuk Soon Choi Hoon Jai Chun Sang Hoon Park Bora Keum Yeon Seok Seo Yong Sik Kim Yoon-Tae Jeen Soon Ho Um Hong Sik Lee Chang Duck Kim Ho Sang Ryu | 2012 | World Journal of Gastroenterology2012，18，19： | 7 |
| 6 | A novel cleansing score system for capsule endoscopy显示文摘AIM:To suggest a new cleansing score system for small bowel preparation and to evaluate its clinical efficacy.METHODS:Twenty capsule endoscopy cases were reviewed and small bowel preparation was assessed with the new scoring system.For the assessment,two visual parameters were used:proportion of visualized mucosa and degree of obscuration.Representative frames from small bowel images were serially selected and scored at 5-min intervals.Intraclass correlation coefficient(ICC)was obtained to assess the reliability of the new scoring system.For efficacy evaluation and validation,scores of our new scoring system were compared with another previously reported cleansing grading system.RESULTS:Concordance with the previous system,inter-observer agreement,and intra-patient agreement were excellent with ICC values of 0.82,0.80,and 0.76,respectively.The intra-observer agreements at four-week intervals were also excellent.The cutoff value of adequate image quality was found to be 2.25.CONCLUSION:Our new scoring system is simple,efficient,and can be considered to be applicable in clinical practice and research. | Sung Chul Park Bora Keum Jong Jin Hyun Yeon Seok Seo Yong Sik Kim Yoon Tae Jeen Hoon Jai Chun Soon Ho Um Chang Duck Kim Ho Sang Ryu | 2010 | World Journal of Gastroenterology2010，16，7： | 5 |
| 7 | Computed tomography findings for predicting severe acute hepatitis with prolonged cholestasis显示文摘AIM: To evaluate the significance of computed tomography (CT) findings in relation to liver chemistry and the clinical course of acute hepatitis. METHODS: Four hundred and twelve patients with acute hepatitis who underwent enhanced CT scanning were enrolled retrospectively. Imaging findings were analyzed for the following variables: gallbladder wall thickness (GWT), arterial heterogeneity, periportal tracking, number and maximum size of lymph nodes, presence of ascites, and size of spleen. The serum levels of alanine aminotransferase, alkaline phosphatase, bilirubin, albumin, and prothrombin time were measured on the day of admission and CT scan, and laboratory data were evaluated every 2-4 d for all subjects during hospitalization. RESULTS: The mean age of patients was 34.4 years, and the most common cause of hepatitis was hepatitis A virus (77.4%). The mean GWT was 5.2 mm. The number of patients who had findings of arterial heterogeneity, periportal tracking, lymph node enlargement > 7 mm, and ascites was 294 (80.1%), 348 (84.7%), 346 (84.5%), and 56 (13.6%), respectively. On multivariate logistic regression, male gender [odds ratio (OR) = 2.569, 95%CI: 1.477-4.469, P = 0.001], toxic hepatitis (OR = 3.531, 95%CI: 1.444-8.635, P = 0.006), level of albumin (OR = 2.154, 95%CI: 1.279-3.629, P = 0.004), and GWT (OR = 1.061, 95%CI: 1.015-1.110, P = 0.009) were independent predictive factors for severe hepatitis. The level of bilirubin (OR = 1.628, 95%CI: 1.331-1.991, P < 0.001) and GWT (OR = 1.172, 95%CI: 1.024-1.342,P = 0.021) were independent factors for prolonged cholestasis in multivariate analysis. CONCLUSION: In patients with acute hepatitis, GWT on CT scan was an independent predictor of severe hepatitis and prolonged cholestasis. | Sang Jung Park Jin Dong Kim Yeon Seok Seo Beom Jin Park Min Ju Kim Soon Ho Um Chang Ha Kim Hyung Joon Yim Soon Koo Baik Jin Yong Jung Bora Keum Yoon Tae Jeen Hong Sik Lee Hoon Jai Chun Chang Duck Kim Ho Sang Ryu | 2013 | World Journal of Gastroenterology2013，19，16： | 4 |
| 8 | Radiotherapy for 65 patients with advanced unresectable hepatocellular carcinoma显示文摘AIM: To evaluate the efficacy of radiotherapy (RT) in patients with advanced unresectable hepatocellular carcinoma (HCC). METHODS: A total of 65 patients were treated with RT in the Korea University Medical Center. The median age of the patients was 60 years, and 86.2% were men. 18.5% and 81.5% of the patients were diagnosed as TNM stage Ⅲ and Ⅳ-A, respectively. Treatment response was assessed 4 mo after initiation of RT. Tumor regression rate 1 mo after initiation of RT (TRR1m) was also assessed. Duration of survival was calculated from the initiation of RT. RESULTS: The objective treatment response was 56.9%. The 12 mo survival rate was 34.7%. Predictive factors for survival were Child-Pugh grade, α-fetoprotein level and treatment response. An objective response was achieved more frequently in patients with TRR1m ≥ 20% than in those with TRR1m < 20% (P < 0.001). CONCLUSION: RT is effective in treating advanced HCC with a tumor response rate of 56.9%. | Yeon Seok Seo Jin Nam Kim Bora Keum Sanghoon Park Yong Dae Kwon Yong Sik Kim Yoon Tae Jeen Hoon Jai Chun Chul Yong Kim Chang Duck Kim Ho Sang Ryu Soon Ho Um | 2008 | World Journal of Gastroenterology2008，14，15： | 4 |
| 9 | Intraductal papillary bile duct adenocarcinoma and gastrointestinal stromal tumor in a case of neurofibromatosis type 1显示文摘We report our experience with a synchronous case of gastrointestinal stromal tumor(GIST) and intraductal papillary neoplasm of the bile duct(IPNB) in anelderly woman with neurofibromatosis type 1(NF-1). A 72-year-old woman presented with a 2-mo history of right upper abdominal pain unrelated to diet and indigestion. Fourteen years earlier, she had been diagnosed with NF-1, which manifested as café au lait spots and multiple nodules on the skin. Computed tomography(CT) revealed a multilocular low-density mass with septation, and mural nodules in the right hepatic lobe, as well as a 1.7-cm-sized well-demarcated enhancing mass in the third portion of the duodenum. The patient subsequently underwent right hepatectomy and duodenal wedge resection. We present here the first report of a case involving a synchronous IPNB and GIST in a patient with NF-1. Our findings demonstrate the possibility of various tumors in NF-1 patients and the importance of diagnosis at an early | Jung Min Lee Jae Min Lee Jong Jin Hyun Hyuk Soon Choi Eun Sun Kim Bora Keum Yoon Tae Jeen Hoon Jai Chun Hong Sik Lee Chang Duck Kim Dong Sik Kim Joo Young Kim | 2018 | World Journal of Gastroenterology2018，24，4： | 4 |
| 10 | Endoscopic en bloc resection of an exophytic gastrointestinal stromal tumor with suction excavation technique显示文摘Here, we report the first successful endoscopic resection of an exophytic gastrointestinal stromal tumor(GIST) using a novel perforation-free suction excavation technique. A 49-year-old woman presented for further management of a gastric subepithelial tumor on the lesser curvature of the lower body, originally detected via routine upper gastrointestinal endoscopy. Abdominal computed tomography and endoscopic ultrasound showed a 4-cm extraluminally protruding mass originating from the muscularis propria layer. The patient firmly refused surgical resection owing to potential cardiac problems, and informed consent was obtained for endoscopic removal. Careful dissection and suction of the tumor was repeated until successful extraction was achieved without serosal injury. We named this procedure the suction excavation technique. The tumor's dimensions were 3.5 cm × 2.8 cm × 2.5 cm. The tumor was positive for C-KIT and CD34 by immunohistochemical staining. The mitotic count was 6/50 high-power fields. The patient was followed for 5 years without tumor recurrence. This case demonstrated the use of endoscopic resection of an exophytic GIST using the suction excavation technique as a potential therapy without surgical resection. | Hyuk Soon Choi Hoon Jai Chun Kyoung-Oh Kim Eun Sun Kim Bora Keum Yoon-Tae Jeen Hong Sik Lee Chang Duck Kim | 2016 | World Journal of Gastroenterology2016，22，23： | 3 |
| 11 | Self-expandable metal stents in patients with postoperative delayed gastric emptying after distal gastrectomy显示文摘AIM To investigate the efficacy and safety of endoscopic stent insertion in patients with delayed gastric emptying after gastrectomy.METHODS In this study, we prospectively collected data from patients who underwent stent placement for delayed gastric emptying(DGE) after distal gastrectomy between June 2010 and April 2017, at a tertiary referral academic center. Clinical improvement, complications, and consequences after stent insertion were analyzed.RESULTS Technical success was achieved in all patients(100%). Early symptom improvement was observed in 15 of 20 patients(75%) and clinical success was achieved in all patients. Mean follow-up period was 1178.3 ± 844.1 d and median stent maintenance period was 51 d(range 6-2114 d). During the follow-up period, inserted stents were passed spontaneously per rectum without any complications in 14 of 20 patients(70%). Symptom improvement was maintained after stent placement without the requirement of any additional intervention in 19 of 20 patients(95%).CONCLUSION Endoscopic stent placement provides prompt relief of obstructive symptoms. Thus, it can be considered an effective and safe salvage technique for post-operative DGE. | Seung Han Kim Bora Keum Hyuk Soon Choi Eun Sun Kim Yeon Seok Seo Yoon Tae Jeen Hong Sik Lee Hoon Jai Chun Soon Ho Um Chang Duck Kim Sungsoo Park | 2018 | World Journal of Gastroenterology2018，24，40： | 2 |
| 12 | A randomized, prospective trial on efficacy and tolerability of low-volume bowel preparation methods for colonoscopy显示文摘 | In Kyung Yoo Jong Soo Lee Hoon Jai Chun Yoon Tae Jeen Bora Keum Eun Sun Kim Hyuk Soon Choi Jae Min Lee Seung Han Kim Seung Joo Nam Hyo Sung Kang Hong Sik Lee Chang Duck Kim Soon Ho Um Yeon Seok Seo Ho Sang Ryu | 2014 | Digestive and Liver Disease2014，，： | 1 |
| 13 | Psychometric Hepatic Encephalopathy Score for the detection of minimal hepatic encephalopathy in Korean patients with liver cirrhosis显示文摘 | Yeon Seok Seo Sun Young Yim Jin Yong Jung Chang Ha Kim Jin Dong Kim Bora Keum Hyonggin An Hyung Joon Yim Hong Sik Lee Chang Duck Kim Ho Sang Ryu Soon Ho Um | 2012 | Journal of Gastroenterology and Hepatology2012，，11： | 1 |
| 14 | Alternative Salvage Technique for Removing Large Sharp Foreign Body Near Upper Esophageal Sphincter显示文摘 | Jong Jin Hyun Hoon Jai Chun Bora Keum Yeon Seok Seo Yong Sik Kim Yoon Tae Jeen Hong Sik Lee Soon Ho Um Chang Duck Kim Ho Sang Ryu | 2012 | Surgical Laparoscopy Endoscopy & Percutaneous Techniques2012，，1： | 1 |
| 15 | Alterna- tive Salvage Technique for Removing Large Sharp Foreign Body Near Upper Esophageal Sphincter 显示文摘 | Jong Jin Hyun Hoon Jai Chun Bora Keum | 2012 | Surg Laparosc Endosc Percutan Tech2012，22，： | 1 |
| 16 | Prognosis of hepatitis B‐related liver cirrhosis in the era of oral nucleos(t)ide analog antiviral agents显示文摘 | Chang Ha Kim Soon Ho Um Yeon Seok Seo Jin Yong Jung 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 | 2012 | Journal of Gastroenterology and Hepatology2012，，10： | 1 |
| 17 | Alternative Salvage Technique for Removing Large Sharp Foreign Body Near Upper Esophageal Sphincter显示文摘 | Jong Jin Hyun Hoon Jai Chun Bora Keum | 2012 | Surg Laparosc Endosc Percutan Tech2012，22，： | 1 |
| 18 | Therapeutic Outcome in 1000 Cases of Endoscopic Submucosal Dissection (ESD) for Early Gastric Neoplasms; Korean ESD Study Group (KESG) Multi-Center Study显示文摘 | Il Kwun Chung Hoi Jin Kim Suck-Ho Lee Tae Hoon Lee Joo Young Cho Bo Young Hwang Bora Keum Jong-Jae Park Hoon Jai Chun Jun Haeng Lee Jae J. Kim Sam Yong Ji Sang Young Seol | 2008 | Gastrointestinal Endoscopy2008，，5： | 1 |
| 19 | The indications for endoscopic resection of esophageal submucosal tumor显示文摘 | Hyuk Soon Choi Hoon Jai Chun Bora Keum Yoon Tae Jeen | 2012 | Gastrointestinal Endoscopy2012，，1： | 1 |
| 20 | Clinical Significance of Hepatitis B Virus Precore and Core Promoter Variants in Korean Patients With Chronic Hepatitis B显示文摘 | Sun Young Yim Soon Ho Um Jin Young Jung Tae Hyung Kim Jin Dong Kim Bora Keum Yeon Seok Seo Hyung Joon Yim Yoon Tae Jeen Hong Sik Lee Hoon Jai Chun Chang Duck Kim Ho Sang Ryu | 2015 | Journal of Clinical Gastroenterology2015，，1： | 1 |
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