Publications by authors named "Dong Chan Joo"

Background: Eupatilin, a flavone isolated from Artemisia species, exerts anti-inflammatory, anti-oxidative, and anti-neoplastic activities. However, the effects of eupatilin on H. pylori-associated gastritis remain unclear.

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Background/aims: Magnifying endoscopy with narrow-band imaging (ME-NBI) enables the visualization of detailed microsurface (MS) and microvascular (MV) structures in the gastrointestinal tract. White globe appearance (WGA) is a small whitish lesion with a globular shape identified during ME-NBI for early gastric cancer (EGC). This study aimed to investigate the associations between WGA, clinicopathological characteristics, and other ME-NBI findings in patients with EGC.

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Circulating tumor cells (CTCs) in cancer-draining veins have diagnostic and prognostic value. However, studies on esophageal squamous cell carcinoma (ESCC) are limited. This study aimed to compare CTCs obtained from different sampling sites (peripheral vein vs.

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Endoscopic resection (ER)-a minimal invasive procedure, compared to surgical gastrectomy, with the advantage of preserving the entire stomach and maintaining the patient's quality of life-is a widely used curative treatment for early gastric cancers (EGCs). Despite its advantages, such as the preservation of the whole stomach, a large area of the gastric mucosa with histologic changes such as atrophy and intestinal metaplasia remains after ER, and so does the risk of metachronous gastric cancers (MGCs). Therefore, regular surveillance endoscopy after curative ER of EGCs is important so that MGCs are detected early and so minimally invasive ER remains a treatment option.

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Article Synopsis
  • * Researchers analyzed data from 464 patients and developed classification models using both clinical and endoscopic factors along with digital image analysis.
  • * Incorporating additional factors improved the performance of AI models, with notable increases in AUC values, especially for random forest and K-nearest neighbor models, indicating more accurate diagnoses.
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This case report presents the successful endoscopic submucosal dissection (ESD) of a well-differentiated esophageal liposarcoma in a 51-year-old male with persistent dysphagia. The cause was initially diagnosed as a 10 cm pedunculated lesion extending from the upper esophageal sphincter to the mid-esophagus. An ESD was chosen over traditional surgery because it is less invasive.

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Esophageal mucoepidermoid carcinoma (EMEC) is a special subtype of esophageal malignancy, accounting for less than 1% of all cases of primary esophageal carcinoma. Pathologically, it consists of a mixture of adenocarcinoma and squamous cell carcinoma with mucin-secreting cells. Special staining for mucicarmine helps to diagnose EMEC.

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Article Synopsis
  • * Both methods had similar patient characteristics, but A-EP had a significantly higher en bloc resection rate (95.2% vs. 78.4%) and a lower recurrence rate (8.1% vs. 37.8%).
  • * A-EP also suggested fewer instances of complications like pancreatitis and duct stricture, indicating it might be a more effective treatment option compared to C-EP.
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Mucosa-associated lymphoid tissue (MALT) lymphoma, also known as extranodal marginal zone lymphoma, is a low-grade B-cell lymphoma that can develop in the mucosal layer of various organs, including the gastrointestinal tract, salivary glands, lungs, and skin. The most common site is the gastrointestinal tract, particularly the stomach. On the other hand, primary esophageal lymphomas are extremely rare.

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Foreign body ingestion is commonly seen in children. However, occasionally it may also be seen among adults and is often associated with intellectual disability, psychiatric disorders, and alcoholism. Ingestion of a magnetic foreign body may cause complications such as gastrointestinal tract perforation, wherein emergency endoscopic removal of the foreign body is generally required.

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The fundic gland type (GA-FG) of gastric adenocarcinoma is a rare variant of gastric cancer recently included in the 5th edition of the World Health Organization's classification of digestive system tumors. Five patients with GA-FG underwent an endoscopic resection at our institution. None of the patients had a infection.

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Article Synopsis
  • Duodenal neuroendocrine tumors (NETs) are rare tumors that develop from neuroendocrine cells and can be challenging to diagnose accurately using standard biopsy methods.
  • This study investigated the use of magnifying endoscopy with narrow-band imaging (ME-NBI) on 22 cases of duodenal NETs and found specific morphological patterns in these tumors, such as regular microsurface and microvascular patterns.
  • The findings suggest that ME-NBI could help distinguish duodenal NETs from other subepithelial lesions, which may improve diagnostic accuracy and treatment planning.
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Background: Subepithelial tumors (SETs) in the upper gastrointestinal (GI) tract are frequently discovered during upper endoscopy, and their management is determined based on size and histopathological diagnosis. We aimed to evaluate the diagnostic performance of endoscopic ultrasonography-guided fine-needle biopsy (EUS-FNB) in upper GI SETs of 2-5 cm in size.

Methods: We included 63 patients who underwent EUS-FNB for upper GI SETs of 2-5 cm in size between January 2013 and February 2020.

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We aimed to evaluate whether adding a sustained-release (SR) formula of mosapride to proton-pump inhibitors (PPIs) would be more effective in controlling symptoms than PPI alone in patients with gastroesophageal reflux disease (GERD). Sixty patients with heartburn and/or regurgitation were randomly assigned to two groups: mosapride SR 15 mg combined with esomeprazole 20 mg once daily (ME group) and esomeprazole 20 mg once daily alone (E group). The primary endpoint was the complete-resolution rate of GERD symptoms after eight-week medication, and the secondary endpoints were the complete-resolution rate of GERD symptoms after four-week medication, symptom-improvement rates ≥ 50% after four- and eight-week medication, and change in reflux-disease-questionnaire (RDQ) and GERD-health-related quality-of-life (GERD-HRQL) scores from baseline at four- and eight-week medication.

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Article Synopsis
  • Barrett's neoplasia is becoming more common in Western countries but remains rare in Asia, leading to limited research on its endoscopic treatment, specifically in Korea.
  • This study analyzed the outcomes of endoscopic submucosal dissection (ESD) for 18 patients with superficial Barrett's neoplasia at Pusan National University Hospital over nearly a decade, highlighting successful resection rates and factors impacting incomplete resection.
  • Results indicated that ESD is effective and safe, with 3-year survival rates of 73% overall and 93% disease-specific, but cautioned about the risk of deeper tumor invasion when considering treatment options.
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Background/aims: Superficial esophageal squamous cell carcinoma (SESCC) is being increasingly detected during screening endoscopy. Endoscopic submucosal dissection (ESD) allows for en bloc and histologically complete resection of lesions. This study assessed the technical feasibility and long-term outcomes of ESD for SESCCs.

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