Publications by authors named "Kwangsik Chun"

Background: Few studies have compared the therapeutic outcomes in patients with HCC who underwent laparoscopic radiofrequency ablation (LRFA) versus percutaneous radiofrequency ablation (PRFA) for hepatocellular carcinoma (HCC). Therefore, this study compared the recurrence and survival outcomes of the two RFA methods in patients with HCC.

Methods: Recurrence and overall survival outcomes were evaluated in 307 patients who underwent LRFA (n = 151) or PRFA (n = 156) as a treatment method for de novo HCC.

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Introduction: This study aimed to compare the prognostic impact of laparoscopic left hepatectomy (LLH) with that of open left hepatectomy (OLH) on patient survival after resection of left hepatocellular carcinoma (HCC).

Methods: Among the 953 patients who received initial treatment for primary HCC that was resectable by either LLH or OLH from 2013 to 2017 in Japan and Korea, 146 patients underwent LLH and 807 underwent OLH. The inverse probability of treatment weighting approach based on propensity scoring was used to address the potential selection bias inherent in the recurrence and survival outcomes between the LLH and OLH groups.

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Backgrounds/aims: We conducted this study to identify long-term outcomes following intraoperative radiofrequency ablation (IO-RFA) for hepatocellular carcinoma (HCC) and to reveal independent prognostic factors for survival.

Methods: From December 1998 to February 2019, 183 patients underwent IO-RFA for HCC. These patients were divided into two groups according to whether RFA was done as a first-line (1-RFA group, n=106) or secondary-line (2-RFA group, n=77) treatment.

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NADPH oxidase (NOX) is a key source of reactive oxygen species (ROS). This study aimed to verify NOX2 and NOX4 expression levels in hepatocellular carcinoma (HCC). A total of 134 matched pairs of HCC cells and non-tumour hepatocytes from 134 patients were examined by immunohistochemical staining, and the association of NOX2 and NOX4 expression with clinicopathological parameters was analysed.

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Apurinic/apyrimidinic endonuclease 1/redox effector factor 1 (APEX1) has been known to play key roles in DNA repair, the regulation of diverse transcriptional activity, and cellular responses to redox activity. This study aimed to examine serum APEX1 (s-APEX1) expression as a possible screening biomarker for clear cell renal cell carcinoma (ccRCC), hepatocellular carcinoma (HCC), and proximal and distal cholangiocarcinoma (CC). A total of 216 frozen serum samples were collected from 39 healthy control cases, 32 patients with ≥58 copies/mL of hepatitis B viral DNA (HBV DNA (+)), 40 ccRCC cases, 59 HCC cases, and 46 CC cases.

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Chronic inflammation is a driving force for the development of metabolic disease including diabetes and obesity. However, the functional characteristics of T-cell senescence in the abnormal glucose homeostasis are not fully understood. We studied the patients visiting a hospital for routine health check-ups, who were divided into two groups: normal controls and people with prediabetes.

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Background And Aim: Elevated cytochrome p450 (CYP) 4A gene expression has been linked to the aggravation of various cancers and affects various regulated metabolites. In hepatocellular carcinoma (HCC), the clinicopathological value of CYP4A has not yet been explored, although CYP4A is expressed at high levels in the liver. The goal of this study was to evaluate the clinicopathological value of CYP4A11 expression in HCC.

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Reactive oxygen species (ROS) contribute to the development of non-alcoholic fatty liver disease. ROS generation by infiltrating macrophages involves multiple mechanisms, including Toll-like receptor 4 (TLR4)-mediated NADPH oxidase (NOX) activation. Here, we show that palmitate-stimulated CD11bF4/80 hepatic infiltrating macrophages, but not CD11bF4/80 Kupffer cells, generate ROS via dynamin-mediated endocytosis of TLR4 and NOX2, independently from MyD88 and TRIF.

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Background: Inoperable hepatocellular carcinoma (HCC) can be treated with laparoscopic radiofrequency ablation (LRFA), which is generally a more accurate and accessible procedure than percutaneous RFA (PRFA). However, few studies have compared survival outcomes between LRFA and PRFA in patients with HCC.

Aims: This study aimed to compare the efficacy of LRFA and PRFA for HCC treatment.

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Backgrounds/aims: To compare the clinical outcomes of intraoperative radiofrequency ablation (RFA) and non-anatomical hepatic resection (NAHR) for small hepatocellular carcinoma (HCC).

Methods: From February 2007 to January 2015, clinical outcomes of thirty four patients with HCC receiving RFA or NAHR were compared, retrospectively.

Results: There was no difference of patient and tumor characteristic between the two groups that received RFA or NAHR.

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Backgrounds/aims: Liver resection is a curative procedure performed worldwide for hepatocellular carcinoma (HCC). Deciding on the appropriate resection range for postoperative hepatic function preservation is an important surgical consideration. This study compares survival outcomes of HCC patients who underwent anatomical or non-anatomical resection, to determine which offers the best clinical survival benefit.

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Backgrounds/aims: This study aims to evaluate the comparative effectiveness of two surgical approaches on the treatment outcomes of radiofrequency ablation (RFA) for malignant liver tumors.

Methods: Fifty-seven patients with malignant liver tumors, hepatocellular carcinoma, cholangiocarcinoma and liver metastases, who were candidates for RFA, underwent laparoscopic or open surgical treatments.

Results: The patients' characteristics were comparable in the two groups that received open (n=33, 57.

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Backgrounds/aims: We present our experience of laparoscopic liver resection for various liver diseases.

Methods: From April 2008 to August 2012 in Chungnam National University, 68 of 253 liver resections were performed laparoscopically. During the first year, laparoscopy-assisted liver resection was mainly performed and subsequently totally laparoscopic liver resection was the main operative type.

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Recent classifications of the common bile duct injury.

Korean J Hepatobiliary Pancreat Surg

August 2014

Laparoscopic cholecystectomy is now a gold standard treatment modality for gallstone diseases. However, the incidence rate of bile duct injury has not been changed for many years. From initial classification published by Bismuth, there have been many classifications of common bile duct injury.

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Introduction: We report our experience with laparoscopic major liver resection in Korea based on a multicenter retrospective study.

Materials And Methods: Data from 1,009 laparoscopic liver resections conducted from 2001 to 2011 were retrospectively collected. Twelve tertiary medical centers with specialized hepatic surgeons participated in this study.

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Backgrounds/aims: Recently many studies have been reported the early results of a hepatectomy for various intrahepatic lesions. Also various types of laparoscopic hepatectomies are being performed in many centers. Some reports about the safety of laparoscopic parenchymal dissection of the liver have been published.

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Background/aims: We assessed the safety of intraoperatively managing the complications that are encountered during laparoscopic cholecystectomy.

Methodology: From September 2003 to November 2006, one thousand thirty four patients underwent laparoscopic cholecystectomy for benign gallbladder diseases. Laparoscopic cholecystectomy was adopted as the first line treatment for all of these patients regardless of the diagnosis or the presence of previous abdominal operation.

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Some studies have reported on laparoscopic excision for treating the choledochal cyst, yet there are no reports on laparoscopic surgery for treating type IV-A choledochal cysts that require a liver resection. In this paper, we report on a case of laparoscopic cyst excision combined with left hemihepatectomy and laparoscopy-assisted Roux-en-Y hepaticojejunostomy for treating a type IV-A choledochal cyst. A 51-year-old female was admitted with symptoms of jaundice and cholangitis.

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