Hyung Su Ahn

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OBJECTIVE To report treatment outcomes and complications of uncovered self-expandable metallic stents (SEMS) as a first-line therapy for inoperable malignant duodenal obstructions in our hospital. METHODS A retrospective analysis was performed in patients who had undergone placement of uncovered SEMS as a first-line therapy for inoperable malignant(More)
BACKGROUND/AIMS We evaluated the usefulness of cystatin C as a prognostic marker in patients with liver cirrhosis and normal serum creatinine. METHODOLOGY We retrospectively analyzed prospectively enrolled patients with liver cirrhosis and normal serum creatinine from February 2007 to March 2008. We checked liver function and kidney variables including(More)
BACKGROUND/AIMS Several noninvasive methods have recently been developed for the evaluation of liver fibrosis. The accuracy of transient elastography (TE), acoustic-radiation-force impulse (ARFI) elastography, and real-time elastography (RTE) in predicting liver fibrosis were evaluated. METHODS Seventy-four patients who had undergone a liver biopsy within(More)
BACKGROUND Direct peroral cholangioscopy (POC) by using an ultra-slim endoscope provides direct visualization of the bile duct and allows for therapeutic intervention. Holmium laser lithotripsy can be effective for retained bile duct stones, but it requires direct visualization during the procedure for safe and effective fragmentation. Direct POC by using(More)
BACKGROUND/AIMS Narrow band imaging (NBI) is a new technique that uses optical filters for imaging of mucosal morphology. The aim of this study was to correlate findings of NBI with magnifying colonoscopy and histology for prediction of neoplastic colorectal lesion. METHODS Between September 2005 and December 2007, 107 colon polyps from 68 patients were(More)
Hyperplastic polyposis syndrome (HPS) is a rare condition characterized by the presence of numerous hyperplastic polyps (HPs) in the colon and rectum. Patients with HPS have an increased risk of colorectal cancer. This link is associated with gene mutations, especially B type Raf kinase (BRAF). However, a case of HPS associated with gene mutations has(More)
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