Diagnostic performance of quantitative ultrasonography for hepatic steatosis in a health screening program: a prospective single-center study.

Purpose: This study compared the diagnostic performance of quantitative ultrasonography (QUS) with that of conventional ultrasonography (US) in assessing hepatic steatosis among individuals undergoing health screening using magnetic resonance imaging-derived proton density fat fraction (MRI-PDFF) as the reference standard.

Methods: This single-center prospective study enrolled 427 participants who underwent abdominal MRI and US. Measurements included the attenuation coefficient in tissue attenuation imaging (TAI) and the scatter-distribution coefficient in tissue scatter-distribution imaging (TSI).

Development and validation of multivariable quantitative ultrasound for diagnosing hepatic steatosis.

This study developed and validated multivariable quantitative ultrasound (QUS) model for diagnosing hepatic steatosis. Retrospective secondary analysis of prospectively collected QUS data was performed. Participants underwent QUS examinations and magnetic resonance imaging proton density fat fraction (MRI-PDFF; reference standard).

Interval Advanced Gastric Cancer After Negative Endoscopy.

Background & Aims: Esophagogastroduodenoscopy (EGD) is effective in reducing gastric cancer mortality through detection of early-stage cancer in areas with a high prevalence of gastric cancer. Although the risk of post-endoscopy advanced gastric cancer (AGC) is low, interval AGC remains a concern. We investigated the characteristics and predictors of interval AGC after negative EGD.

Clinical course of subepithelial lesions detected on upper gastrointestinal endoscopy.

Aim: To evaluate the natural history of subepithelial lesions.

Methods: We reviewed the medical records of 104159 patients who underwent upper gastrointestinal endoscopy at the Center for Health Promotion of Samsung Medical Center between 1996 and 2003. Subepithelial lesions were detected in 795 patients (0.

Procedure-related musculoskeletal symptoms in gastrointestinal endoscopists in Korea.

Aim: To determine the prevalence and risk factors of work-related musculoskeletal disorders in gastrointestinal endoscopists in Korea.

Methods: A survey of musculoskeletal symptoms, using a self-administered questionnaire, was conducted on 55 endoscopists practicing in general hospitals or health promotion centers.

Results: Forty-nine (89.

[Changes in the profiles of causative agents and antibiotic resistance rate for spontaneous bacterial peritonitis: an analysis of cultured microorganisms in recent 12 years].

Backgrounds/aims: The causative agents for spontaneous bacterial peritonitis (SBP) and antibiotic resistance rate vary according to the regions and time. This study evaluated the recent changes in the profiles of microorganisms and antibiotic resistance rate for the choice of effective antibiotics in treating SBP.

Methods: The clinical records of 1,018 episodes of SBP from November, 1994 to December, 2005, were analyzed retrospectively.

[Clinical factors that predicts successful eradication of Helicobacter pylori].

Background/aims: Antibiotic resistance and compliance are regarded to be important which affect the eradication of Helicobacter pylori (H. pylori). However, it is not easy to apply the antibiotic resistance test in clinical field.

[Transient intestinal obstruction due to stool impaction in the elderly].

Background/aims: Acute intestinal obstruction is an urgent disease to be diagnosed and treated promptly. In elderly, fecal impaction may be an important and preventable cause of colonic obstruction. We investigated the clinical features of patients presenting with identical features of intestinal obstruction transiently due to fecal impaction.

[A case of mucinous gastric adenocarcinoma as submucosal tumor].

Gastric mucinous adenocarcinoma is a rare histologic subtype of gastric cancers. It has been reported that the gross or endoscopic finding of mucinous gastric carcinoma is commonly described as a ulcerative or fungating mass in common. There has been controversy over the prognosis and the gross morphology of mucinous gastric adenocarcinoma.