Publications by authors named "Chang In Choi"

Systematic literature review is essential for evidence-based medicine, requiring comprehensive analysis of clinical trial publications. However, the application of artificial intelligence (AI) models for medical literature mining has been limited by insufficient training and evaluation across broad therapeutic areas and diverse tasks. Here, we present LEADS, an AI foundation model for study search, screening, and data extraction from medical literature.

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Purpose: This study aimed to identify the current perioperative management practices for gastric cancer surgery in South Korea and develop a consensus-driven Enhanced Recovery After Surgery (ERAS) protocol for a multicenter randomized controlled trial (RCT).

Materials And Methods: A survey was conducted with 20 principal investigators, comprising one gastric surgeon and one anesthesiologist each, from 10 tertiary hospitals in South Korea who participated in a planned multicenter RCT. The survey included 41 questions regarding ERAS implementation and department-specific perioperative management practices.

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Purpose: This study aimed to evaluate the impact of declining surgical residency program enrollment on patient care and outcomes in colorectal cancer surgeries.

Methods: This retrospective observational study included 676 patients (410 males; median age: 69 years) who underwent colorectal cancer surgery at Pusan National University Hospital between January 2018 and June 2024. Patients were divided into Group A (before December 31, 2023; with residents) and Group B (after January 1, 2024; without residents).

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Following the publication of the above article, an interested reader drew to the authors' attention that the RT‑PCR data panels shown in Fig. 3C, showing the effects of PBIT and PBI‑Se treatment on endogenous IL‑8 mRNA expression levels in CaCo cells, contained issues. Specifically, on p.

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Gastric cancer is one of the most common cancers in both Korea and worldwide. Since 2004, the Korean Practice Guidelines for Gastric Cancer have been regularly updated, with the 4th edition published in 2022. The 4th edition was the result of a collaborative work by an interdisciplinary team, including experts in gastric surgery, gastroenterology, endoscopy, medical oncology, abdominal radiology, pathology, nuclear medicine, radiation oncology, and guideline development methodology.

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Article Synopsis
  • The study investigates the learning curve for hand-assisted laparoscopic living donor nephrectomy (HLDN) done by a trained gastrointestinal surgeon, analyzing data from 96 patients over ten years.
  • Researchers categorized the surgeon’s experience into three phases (novice, development, competency) based on operation times and assessed the results using the cumulative sum (CUSUM) method.
  • Findings showed that operation times decreased significantly across the phases, indicating improved efficiency, with about 30 cases needed to attain proficiency, while complications did not vary significantly among the groups.
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  • A randomized controlled trial (KLASS-07) was conducted to compare the efficacy of totally laparoscopic distal gastrectomy (TLDG) and laparoscopy-assisted distal gastrectomy (LADG) in patients with clinical stage I gastric cancer.
  • The study involved 442 patients, with results showing no significant difference in overall complication rates between TLDG and LADG; however, TLDG resulted in fewer instances of postoperative ileus and pulmonary complications.
  • Quality of life improvements were noted in TLDG patients regarding pain, anxiety, emotion, and body image at 3-6 months post-surgery, although these differences were not sustained after one year.
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Background: As advancements in surgical instruments and techniques continue to evolve, minimally invasive surgery has become increasingly preferred as a means of reducing patient pain and recovery time. However, one major challenge in performing minimally invasive surgery for early gastrointestinal cancer is accurately identifying the location of the lesion. This is particularly difficult when the lesion is confined to the lumen of the intestine and cannot be visually confirmed from the outside during surgery.

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Background: This study aimed to evaluate the clinical outcomes and efficacy of enhanced recovery after surgery (ERAS) protocol in patients undergoing distal gastrectomy for gastric cancer (GC).

Methods: Patients were randomly assigned to the ERAS group (EG) and the conventional care group (CG) by stratified randomization according to age and sex. The primary endpoint was adjusted postoperative hospital stay, calculated using discharge criteria developed to evaluate recovery.

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Objective: While a rushed operation can omit essential procedures, prolonged operative time results in higher morbidity. Nevertheless, the optimal operative time range remains uncertain. This study aimed to estimate the ideal operative time range and evaluate its applicability in laparoscopic cancer surgery.

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Article Synopsis
  • - This study investigates Petersen's hernia, which can occur after specific types of stomach surgeries, and compares two methods for preventing bowel obstruction caused by this hernia: the conventional defect closure method and the newer mesenteric fixation method.
  • - Conducted as a randomized controlled trial in Korea, the research includes patients with diagnosed gastric cancer who have undergone certain types of surgical anastomosis and aims to determine the effectiveness of each method in preventing bowel obstruction over a three-year period.
  • - Results from this trial are expected to provide valuable insights on the efficacy and safety of the mesenteric fixation method, potentially establishing it as a superior technique for closing Petersen's defects.
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Background: This systematic review and meta-analysis investigated the diagnostic performance of F-18 fluorodeoxyglucose (FDG) positron emission tomography (PET) or PET/computed tomography (PET/CT) for the detection of disease recurrence after curative resection of gastric cancer.

Methods: The PubMed and Embase databases, from the earliest available date of indexing through November 30, 2019, were searched for studies evaluating the diagnostic performance of F-18 FDG PET or PET/CT to detect recurrent disease after gastric cancer surgery.

Results: Across 17 studies (1,732 patients), the pooled sensitivity for F-18 FDG PET or PET/CT was 0.

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Gastric cancer is one of the most common cancers in Korea and the world. Since 2004, this is the 4th gastric cancer guideline published in Korea which is the revised version of previous evidence-based approach in 2018. Current guideline is a collaborative work of the interdisciplinary working group including experts in the field of gastric surgery, gastroenterology, endoscopy, medical oncology, abdominal radiology, pathology, nuclear medicine, radiation oncology and guideline development methodology.

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Desmoid tumours are rare tumours originating from fibroblasts, and are characterised by local infiltration and no metastasis. When complete resection is possible, surgical resection is considered a first-line treatment. In the case of large desmoid tumours, it is mainly performed by laparotomy, not laparoscopy.

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Aim: To predict survival time of Korean hepatocellular carcinoma (HCC) patients using multi-center data as a foundation for the development of a predictive artificial intelligence model according to treatment methods based on machine learning.

Methods: Data of patients who underwent treatment for HCC from 2008 to 2015 was provided by Korean Liver Cancer Study Group and Korea Central Cancer Registry. A total of 10,742 patients with HCC were divided into two groups, with Group I (2920 patients) confirmed on biopsy and Group II (5562 patients) diagnosed as HCC according to HCC diagnostic criteria as outlined in Korean Liver Cancer Association guidelines.

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Background: Total laparoscopic distal gastrectomy for early gastric cancer has been widely accepted; however, reduced-port laparoscopic distal gastrectomy has not gained the same popularity because of technical difficulties and oncologic safety issues. This study aimed to analyze the oncologic safety and short-term surgical outcomes of patients who underwent reduced-port laparoscopic distal gastrectomy (RpLDG) for gastric cancer.

Methods: Consecutive patients who underwent surgical treatment between January 2016 and May 2018 were included in this study.

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Article Synopsis
  • Internal hernia is a rare but serious condition that can occur after gastrectomy due to gastric cancer, necessitating careful monitoring and screening for patients post-surgery.
  • A study analyzing patients from 2008 to 2018 found an incidence rate of 0.9%, with laparoscopic surgery significantly increasing the risk of developing an internal hernia.
  • Key factors associated with internal hernias included a body mass index (BMI) below 25 and undergoing proximal gastrectomy; prompt CT scanning and surgical intervention are crucial for preventing serious complications.
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We reviewed our experience with the management of intussusception presenting as a complication of laparoscopic gastrectomy (LG) and studied the feasibility of a laparoscopic intervention to treat or prevent this condition. We retrospectively analyzed the data of 12 patients diagnosed with intussusception, following gastrectomy, from 2008 to 2017, including clinical manifestations, incidence, post-LG time-interval before diagnosis, and treatment. Totally, 12/2300 gastrectomy patients (0.

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Background: Gastrointestinal stromal tumor (GIST) of the small bowel is a rare malignancy and accounts for only 0.1-3% of all gastrointestinal neoplasms. GISTs may mimic gynecologic tumors.

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To analyze the surgical trend and brief postoperative results of laparoscopic distal gastrectomy (LDG) in Korea on the basis of a multicenter cohort. Data of 812 patients who underwent LDG between January and December 2016 were collected from 14 surgeons at 7 institutions. Patients were divided into laparoscopy-assisted distal gastrectomy (LADG) group and totally laparoscopic distal gastrectomy (TLDG) group.

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Purpose: Postoperative complications (PCs) after gastrectomy are associated with readmission and longer hospital stay. This study aimed to determine the role of CRP as an early predictor of PCs and a reliable discharge indicator after gastrectomy.

Methods: Clinicopathologic data and PCs of 613 patients who underwent gastrectomy for gastric cancer in 2015-2016 were retrospectively analyzed, including consecutive blood samples for CRP obtained preoperatively, at the operative day, and postoperatively.

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Background: The curative surgical treatment of gastric cancer in the current laparoscopic surgical era relies on the surgeon's preference, technical difficulties, and concerns regarding outcome have led to the availability of totally laparoscopic distal gastrectomy (TLDG) and laparoscopic-assisted distal gastrectomy (LADG). A consensus on which of the two procedures is preferable is necessary. Therefore, the aim of this study was to evaluate the differences between LADG and TLDG in terms of surgical outcomes, postoperative recovery, pain, and complications.

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Background: This retrospective cohort study compared proximal gastrectomy (PG) with double-tract reconstruction (DTR) versus total gastrectomy (TG) with Roux-en-Y reconstruction in terms of clinical outcomes.

Methods: All consecutive patients with upper early gastric cancer (EGC) who underwent PG-DTR or TG in 2008-2016 were selected. TG patients who matched PG-DTR patients in age, sex, body mass index, clinical stage, and ASA score were selected by propensity score matching.

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Background: KLASS (the Korean Laparoendoscopic Gastrointestinal Surgery Study) is a time-honored study group that has established laparoscopic surgery for gastrointestinal disease in Korea and has performed some important studies for the rationale of laparoscopic gastrointestinal surgery. A multi-center RCT (randomized controlled trial) to compare the quality of life (QOL) of patients undergoing totally laparoscopic distal gastrectomy (TLDG) and laparoscopy-assisted distal gastrectomy (LADG) for gastric cancer, named as KLASS 07, has been currently prepared in Korea.

Methods: Patients diagnosed as gastric cancer, with clinical stage IA (T1N0M0) or IB (T1N1M0 / T2N0M0) according to the 7th edition of the Americal Joint Committee on Cancer System, were randomized to receive either TLDG or LADG.

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