Jun Won Chung

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PURPOSE To prospectively compare the accuracy of computed tomographic (CT) and magnetic resonance (MR) enterography and small-bowel follow-through (SBFT) examination for detection of active small-bowel inflammation and extraenteric complications in patients with Crohn disease (CD). MATERIALS AND METHODS The institutional review board approved the study(More)
OBJECTIVES The increasing levels of bacterial antibiotic resistance have increased the need to evaluate the second-line treatments for Helicobacter pylori. Bismuth-based quadruple therapy is recommended as a second-line treatment, but the optimal duration of this treatment is still debatable. We prospectively analyzed the eradication rate of H. pylori(More)
Background There is no consensus regarding the degree of healing of endoscopic submucosal dissection (ESD)-induced ulcers and the optimal duration of proton pump inhibitor (PPI) treatment. Aim To evaluate the degree of healing and the factors associated with healing of ESD-induced ulcers after PPI therapy for 4 weeks. Methods Fifty-six patients who(More)
BACKGROUND Endoscopic resection (ER) has become an important therapeutic option for early gastric cancer (EGC). Some investigators have suggested that this indication should be extended. We aimed to compare the extended indication of ER for intramucosal EGC based on data from a large, single-center study. METHODS We assessed lymph node metastasis (LNM)(More)
BACKGROUND The clinical characteristics of ulcerative colitis (UC) in Asian populations have not been well characterized. We therefore investigated the clinical features and natural history of UC in Korea. METHODS We retrospectively analyzed 304 Korean patients with UC first diagnosed at the Asan Medical Center between June 1989 and August 2005. RESULTS(More)
The impact of CDH1 gene mutations and large deletions on hereditary diffuse gastric cancer (HDGC) and early onset diffuse gastric cancer (EODGC) has not been determined in Asians. We investigated the mutation status of the CDH1 gene in 25 Korean EODGC patients younger than 50 years and 23 HDGC patients who met the clinical criteria for HDGC. Polymerase(More)
BACKGROUND AND AIM Obesity as a risk factor for colorectal neoplasm (CRN) is controversial. In the present study, we evaluated visceral obesity as a risk factor for CRN. METHODS We prospectively enrolled 200 consecutive, asymptomatic adults (male : female = 133:67, mean age, 50.9 +/- 8.5 years) undergoing both colonoscopy and abdominopelvic computed(More)
BACKGROUND/AIMS Because the efficacy of standard triple therapy for Helicobacter pylori eradication has declined, new regimens such as sequential therapy (ST) and concomitant therapy (CoCTx) have been introduced. The aim of this study was to compare the efficacy of 10-day ST and 10-day CoCTx for H. pylori eradication. METHODS We retrospectively reviewed(More)
PURPOSE To evaluate the diagnostic performance of computed tomographic (CT) enterography in identifying the source of obscure gastrointestinal bleeding and to determine clinical features associated with a higher diagnostic yield of CT enterography. MATERIALS AND METHODS The institutional review board approved this study, with waiver of informed consent.(More)
BACKGROUND AND AIM Increased resistance of Helicobacter pylori to antibiotics has increased the need to develop new first-line treatments for H. pylori. We have prospectively evaluated 10-day sequential versus conventional triple therapy in peptic ulcer patients. METHODS One hundred and fifty-nine patients with peptic ulcer diseases were prospectively(More)