Publications by authors named "Seong-Yeob Ryu"

Background: Few studies have been conducted on the prevention of bile reflux in gastric cancer patients who have undergone gastrectomy. The aim of this study was to evaluate the efficacy and safety of ursodeoxycholic acid (UDCA) in preventing bile reflux after gastrectomy in patients with gastric cancer.

Methods: This study was a secondary analysis of the PEGASUS-D trial, a randomized, double-blind, placebo-controlled clinical trial.

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Purpose: The purpose of this study was to describe the technique of intraoperative transpyloric optic navigation (TPON) and determine its efficacy and feasibility during totally laparoscopic distal gastrectomy (TLDG) in patients with gastric cancer.

Methods: Seventy-nine patients who underwent laparoscopic gastrectomy with transpyloric optic localization of the tumor from January 2016 through December 2018 were enrolled in this study. After resecting the first portion of the duodenum, the distal part of the stomach was exteriorized through an extended supraumbilical trocar site, and a balloon trocar was introduced from the pylorus to determine the location of tumor and determine its resection margin.

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Background And Aim: Cancer survivors are gradually increasing, however, they suffer from various difficulties. We aimed to investigate the characteristics of cancer survivors and the effects of the services of the Korean Cancer Survivorship Center Pilot Project launched by the South Korean government on distress.

Methods: A prospective observational cohort study was performed on cancer survivors who completed primary treatment.

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Objectives: Frail older adults with gastric cancer are at an increased risk of poor postoperative outcomes. We assessed whether geriatric frailty assessed using the Study of Osteoporotic Fractures (SOF) index could predict post-gastrectomy mortality.

Materials And Methods: We retrospectively assessed older adults (age ≥ 65 years) who underwent gastrectomy for gastric cancer between April 2012 and September 2015.

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Purpose: With advances in surgical techniques, reduced-port laparoscopic surgery is increasingly being performed for the treatment of gastric carcinoma. Many studies have reported satisfactory short-term outcomes after reduced 3-port laparoscopic gastrectomy (LG). The aim of this study was to investigate the long-term oncological outcomes of 3-port LG in patients with gastric carcinoma.

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Purpose: The role of prophylactic abdominal drainage in total gastrectomy is not well-established. This study aimed to evaluate the efficacy of abdominal drainage in the prevention and management of major intra-abdominal complications after total gastrectomy for gastric carcinoma.

Materials And Methods: We retrospectively reviewed the data of 499 patients who underwent total gastrectomy for gastric carcinoma in a high-volume institution.

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Background & Aims: The benefits of enhanced recovery after surgery (ERAS) in patients undergoing gastrectomy have been reported in several studies; however, there is limited evidence supporting the efficacy of ERAS in clinical settings. We aimed to identify the benefits of ERAS in the clinical setting by investigating short-term surgical outcomes before and after the implementation of ERAS in patients who underwent gastrectomy.

Methods: We searched our gastric cancer database from 2008 to 2018 to identify patients who underwent gastrectomy before ERAS was implemented (2008-2009) and after the final version of ERAS was implemented (2016-2018).

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Importance: The incidence of gallstones has been reported to increase after gastrectomy. However, few studies have been conducted on the prevention of gallstone formation in patients who have undergone gastrectomy.

Objective: To evaluate the efficacy and safety of ursodeoxycholic acid (UDCA) in preventing gallstone formation after gastrectomy in patients with gastric cancer.

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Background: D2 lymph node dissection (LND) is a widely performed as a standard procedure for advanced gastric cancer (AGC). However, there is little evidence supporting D2 over D1+ LND for gastric cancer treatment. This study compared the long-term outcomes of D2 and D1+ LND for AGC.

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Background: With advances in surgical technique and instrumentation, intracorporeal anastomosis is increasingly being performed for laparoscopic total gastrectomy (LTG). However, the benefits of intracorporeal anastomosis in reducing postoperative complications have not been demonstrated, although its technical feasibility has been proven in many studies. In this study, we investigated the impact of intracorporeal anastomosis in reducing postoperative complications after LTG.

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Purpose: Laparoscopic surgery is associated with lower surgical site infection (SSI) rates due to minimal skin incision and non-exposure of visceral organs. Most previous studies have analyzed the efficacy of prophylactic antibiotic use in open surgery. Here, we investigated the feasibility of total laparoscopic distal gastrectomy (TLDG) for gastric carcinoma without prophylactic antibiotic use.

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Background: Since the eighth American Joint Committee on Cancer (AJCC) classification recently introduced the clinical classification for preoperative staging of gastric cancer, the new clinical classification has not been extensively validated yet. Therefore, in this study, we compared the prognostic performance of the new clinical classification and the pathologic classification for preoperative staging of gastric cancer.

Methods: We reviewed 3027 patients with gastric cancer who were surgically treated between 2009 and 2013.

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Purpose: Adjuvant chemotherapy for gastric cancer, particularly stage III, improves survival after curative D2 gastrectomy. We investigated the clinical value of the lymph-node ratio (LNR; number of metastatic lymph nodes/number of lymph nodes examined) for selecting the appropriate adjuvant chemotherapy regimen in patients with D2-resected stage II/III gastric cancer.

Methods: We reviewed the data of 819 patients who underwent curative D2 gastrectomy followed by adjuvant chemotherapy.

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Importance: Laparoscopic distal gastrectomy is gaining popularity over open distal gastrectomy for gastric cancer because of better early postoperative outcomes. However, to our knowledge, no studies have proved whether laparoscopic distal gastrectomy is oncologically equivalent to open distal gastrectomy.

Objective: To examine whether the long-term survival among patients with stage I gastric cancer undergoing laparoscopic distal gastrectomy is noninferior to that among patients undergoing open distal gastrectomy.

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Background: Lymph nodes (LNs) at the splenic hilum (no. 10) are treated as regional LNs in proximal gastric carcinoma. However, patients with no.

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Purpose: With increasing life expectancy, the presence of comorbidities has become a major concern in elderly patients who require surgery. However, little is known about the impact of different comorbidities on the outcomes of laparoscopic total gastrectomy (LTG). In this study, we investigated the impact of comorbidities on postoperative complications in patients undergoing LTG for gastric carcinoma.

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Backgrounds: Patients with proximal gastric carcinoma undergo total gastrectomy with concomitant splenectomy to ensure the complete removal of splenic hilar lymph nodes. However, the impact of splenectomy on survival remains uncertain. This study aimed to investigate the impact of splenectomy on survival among patients with gastric carcinoma.

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Purpose: To determine the occurrence of methylation in gastric carcinoma (GC), the status and level of CpG methylation in the promoter region of () were analyzed in early and advanced GCs, as well as in normal gastric tissues.

Methods: The extent of promoter methylation of the gene was assessed quantitatively using pyrosequencing in 60 early and 60 advanced GCs samples harvested upon gastrectomy, and 40 normal gastric mucosa samples from patients with benign gastric diseases as controls.

Results: The methylation frequency for the gene was significantly higher in early than in advanced GCs (40.

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Background: Enhanced recovery after surgery (ERAS) programs have gained widespread acceptance in different fields of major surgery. However, most elements of perioperative care in ERAS are based on practices that originated from colorectal surgery. This study investigated compliance with the main elements of ERAS for patients undergoing gastrectomy for gastric carcinoma.

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Purpose: The endoscopic management of a fully covered self-expandable metal stent (SEMS) has been suggested for the primary treatment of patients with anastomotic leaks after total gastrectomy. Embedded stents due to tissue ingrowth and migration are the main obstacles in endoscopic stent management.

Materials And Methods: The effectiveness and safety of endoscopic management were evaluated for anastomotic leaks when using a benign fully covered SEMS with an anchoring thread and thick silicone covering the membrane to prevent stent embedding and migration.

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The benefits of resection for gastric carcinoma patients with non-curative factors remain controversial. Thus, we evaluated the survival benefits of resection in these gastric carcinoma patients. We reviewed the hospital records of 467 gastric carcinoma patients with non-curative factors who had resection (n=305) and compared their clinicopathological findings with individuals (n=162) who underwent bypass or exploration from 1996 to 2010.

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Adjuvant chemotherapy using TS-1 or capecitabine plus oxaliplatin improves survival outcomes after radical gastrectomy, with both regimens showing similar efficacies. A total of 494 patients with stage II‒III gastric cancer who underwent curative D2 gastrectomy and received adjuvant chemotherapy from April 2004 to June 2014 were included in this study. 219 patients received TS-1, and 275 received platinum-based chemotherapy.

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Purpose: Previous studies indicated conflicting results regarding the prognosis of gastric cancer with a family history (FHX). This study aimed to determine the clinicopathological features and survival of patients with gastric cancer with a FHX.

Materials And Methods: We reviewed 2,736 patients with gastric cancer who underwent surgery between 2003 and 2009.

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Background: Recent studies have shown a lower risk of surgical site infections (SSI) after laparoscopic distal gastrectomy compared to open surgery. This is a phase 2 study aiming to determine the incidence of SSI after laparoscopic distal gastrectomy without using antimicrobial prophylaxis (AMP).

Methods: cT1N0 gastric cancers that were subject to laparoscopic distal gastrectomy were enrolled.

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