Hyunsoo Chung

Intestinal metaplasia (IM) is a pre-malignant condition of the gastric mucosa associated with increased gastric cancer (GC) risk. Analyzing 1,256 gastric samples (1,152 IMs) across 692 subjects from a prospective 10-year study, we identify 26 IM driver genes in diverse pathways including chromatin regulation (ARID1A) and intestinal homeostasis (SOX9). Single-cell and spatial profiles highlight changes in tissue ecology and IM lineage heterogeneity, including an intestinal stem-cell dominant cell

Postesophagectomy gastric outlet obstruction occurs in 20 % – 30 % of patients who undergo esophagectomy and is associated with significant morbidity and delayed recovery [1]. Recently, endoscopic pyloromyotomy, also called gastric peroral endoscopic myotomy (POEM), has been reported, in pigs and in a patient with refractory diabetic gastroparesis [2] [3]. We report a case of postesophagectomy delayed gastric emptying that was successfully treated with endoscopic pyloromyotomy.

Helicobacter pylori (H. pylori) infection is on the rise as a cause of immune thrombocytopenia (ITP). It has been suggested that platelet recovery can be achieved following successful microbial eradication, although, the exact pathophysiology has yet to be fully elucidated. This study evaluated the long-term effects of H. pylori eradication monotherapy on platelet count recovery in patients with ITP. H. pylori eradication was analysed in 61 ITP patients. Patients who maintained a complete respon

INTRODUCTION: Endoscopic submucosal dissection (ESD) is a preferred treatment option for superficial esophageal squamous cell carcinoma (SESCC). However, only few studies compared long-term survival outcomes of ESD with surgery. This study compared the overall survival (OS), recurrence-free survival, and complication rates of ESD with those of surgery. METHODS: We reviewed patients who underwent ESD (n = 70) or surgery (n = 114) for SESCC at Seoul National University Hospital from 2011 to 2017.

Gastroparesis (GP) is a syndrome characterized by delayed gastric emptying in the absence of mechanical obstruction of the stomach or proximal small bowel. Currently available dietary and medical therapies are limited and have suboptimal efficacy. Pylorus-directed therapies have showed promising results. Gastric peroral endoscopic myotomy (G-POEM) has been reported for the treatment of GP refractory to standard therapy with promising results. This article reviews the current applications and res

POEM provided excellent clinical symptomatic relief and esophageal remodeling in terms of restoration of peristalsis and reduction in diameter of the esophageal body, especially in patients with type III achalasia.

This study aimed to identify biomolecular differences between benign gastric tissues (gastritis/intestinal metaplasia) and gastric adenocarcinoma and to evaluate the diagnostic power of Raman spectroscopy-based machine learning in gastric adenocarcinoma. Raman spectroscopy-based machine learning was applied in real-time during endoscopy in 19 patients (aged 51-85 years) with high-risk for gastric adenocarcinoma. Raman spectra were captured from suspicious lesions and adjacent normal mucosa, whic

Abstract Esophageal stricture after extensive endoscopic submucosal dissection impairs the quality of life of patients with superficial esophageal carcinoma. Beyond the limitations of conventional treatments including endoscopic balloon dilatation and the application of oral/topical corticosteroids, several cell therapies have been recently attempted. However, such methods are still limited in clinical situations and existing setups, and the efficacies are less in some cases since the transplant

BACKGROUND AND AIMS: Gastric mucosal swab may be a more sensitive sampling method than a biopsy since Helicobacter pylori (H. pylori) resides within the mucus layer. We compared the diagnostic performance of the rapid urease test (RUT) and bacterial load of H. pylori between swabs and tissue biopsy. METHODS: Overall, 276 RUTs (138 swab-RUTs (S-RUT) and 138 tissue-RUTs (T-RUT)) were performed. To diagnose H. pylori infection, RUT, H. pylori PCR, and 16S ribosomal RNA gene sequencing of tissue and