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Gastric lesions in patients with Crohn`s disease in Korea: a multicenter study
( So Hoonsub ),( Byong Duk Ye ),( Young Soo Park ),( Jihun Kim ),( Joo Sung Kim ),( Won Moon ),( Kang-Moon Lee ),( You Sun Kim ),( Bora Keum ),( Seong-Eun Kim ),( Kyeong Ok Kim ),( Eun Soo Kim ),( Cha 대한장연구학회 2016 Intestinal Research Vol.14 No.1
Gastric pathology and Helicobacter pylori (H. pylori) infection among Asian patients with Crohn’s disease (CD) are still unclear. We evaluated gastric histologic features and frequency of H. pylori infection in Korean patients with CD. Methods: Among 492 patients with CD receiving upper gastrointestinal (GI) endoscopic evaluation in 19 Korean hospitals, we evaluated the endoscopic findings and gastric histopathologic features of 47 patients for our study. Histopathologic classification was performed using gastric biopsy tissues, and H. pylori infection was determined using the rapid urease test and histology. Results: There were 36 men (76.6%), and the median age of patients at the time of upper GI endoscopy was 23.8 years (range, 14.2.60.5). For CD phenotype, ileocolonic disease was observed in 38 patients (80.9%), and non-stricturing, nonpenetrating disease in 31 patients (66.0%). Twenty-eight patients (59.6%) complained of upper GI symptoms. Erosive gastritis was the most common gross gastric feature (66.0%). Histopathologically, H. pylori -negative chronic active gastritis (38.3%) was the most frequent finding. H. pylori testing was positive in 11 patients (23.4%), and gastric noncaseating granulomata were detected in 4 patients (8.5%). Gastric noncaseating granuloma showed a statistically significant association with perianal abscess/ fistula (P =0.0496). Conclusions: H. pylori -negative chronic active gastritis appears to be frequent among Korean patients with CD. The frequency of H. pylori infection was comparable with previous studies. An association with perianal complications suggests a prognostic value for gastric noncaseating granuloma in patients with CD. (Intest Res 2016;14:60-68)
( Hoonsub So ),( Sun Jin Boo ),( Hyungil Seo ),( Ho Su Lee ),( Hyojeong Lee ),( Sang Hyoung Park ),( Kyung Jo Kim ),( Byong Duk Ye ),( Jeong Sik Byeon ),( Seung Jae Myung ),( Suk Kyun Yang ),( Jin Ho 대한장연구학회 2015 Intestinal Research Vol.13 No.2
Background/Aims: Previous studies have suggested a weak correlation between self-reported rectal effluent status and bowel preparation quality. We aim to evaluate whether photographic examples of rectal effluents could improve the correlation between patient descriptions of rectal effluents and bowel preparation quality. Methods: Before colonoscopy, patients were asked to describe the nature of their last three rectal effluents. Photographic examples of rectal effluents were provided as a reference for scoring. Bowel preparation was subsequently assessed by a single endoscopist using a global preparation assessment scale. Preparation outcomes were grouped into two levels (excellent to good vs. fair to inadequate). Both univariate and multivariate logistic regression models were used to find any association between bowel preparation quality and patient characteristics. Results: A total of 138 patients completed the questionnaires. The mean age was 56.5±10.4 years. The mean sum of the last three rectal effluent scores was 5.9±2.0. Higher rectal effluent scores (odds ratio [OR], 0.82; P=0.043) and the presence of diverticula (OR, 0.16; P<0.001) were risk factors for suboptimal preparation. Conclusions: Photographic example-guided patient descriptions of rectal effluents showed a statistically significant association with bowel preparation quality. However, clinical significance seemed to be low. The presence of diverticula was an independent predictive factor for suboptimal bowel preparation quality. (Intest Res 2015;13:153-159)
Yuanzhe Piao,유태경,Hoonsub Kim,Yejung Choi,Chaedong Lee,Eunjin Choi,Dasom Kim 나노기술연구협의회 2019 Nano Convergence Vol.6 No.34
We report a visual detection of Cr(VI) ions using silver-coated gold nanorods (AuNR@Ag) as sensing probes. Au NRs were prepared by a seed-mediated growth process and AuNR@Ag nanostructures were synthesized by growing Ag nanoshells on Au NRs. Successful coating of Ag nanoshells on the surface of Au NRs was demonstrated with TEM, EDS, and UV–vis spectrometer. By increasing the overall amount of the deposited Ag on Au NRs, the localized surface plasmon resonance (LSPR) band was significantly blue-shifted, which allowed tuning across the visible spectrum. The sensing mechanism relies on the redox reaction between Cr(VI) ions and Ag nanoshells on Au NRs. As the concentration of Cr(VI) ions increased, more significant red-shift of the longitudinal peak and intensity decrease of the transverse peak could be observed using UV–vis spectrometer. Several parameters such as concentration of CTAB, thickness of the Ag nanoshells and pH of the sample were carefully optimized to determine Cr(VI) ions. Under optimized condition, this method showed a low detection limit of 0.4 μM and high selectivity towards Cr(VI) over other metal ions, and the detection range of Cr(VI) was tuned by controlling thickness of the Ag nanoshells. From multiple evaluations in real sample, it is clear that this method is a promising Cr(VI) ion colorimetric sensor with rapid, sensitive, and selective sensing ability.
왕호영 ( Hoyoung Wang ),소훈섭 ( Hoonsub So ),나양원 ( Yang Won Nah ),김미성 ( Misung Kim ),이태영 ( Tae Young Lee ),서민정 ( Minjung Seo ),방성조 ( Sung-Jo Bang ) 대한소화기학회 2021 대한소화기학회지 Vol.78 No.3
Accessory spleens are common congenital anatomic variations that are usually asymptomatic. On the other hand, they can be clinically significant if complicated by hemorrhage, torsion, or infarction. This paper describes a case of an infarcted accessory spleen in a 30-year-old male who presented with abdominal pain. Abdominal CT and MRI revealed an isolated mass, 4.5 cm in size, in the perisplenic area. An infarcted accessory spleen was suspected. The patient underwent laparoscopic accessory splenectomy. Histopathology identified the mass as splenic tissue that had undergone ischemic necrosis. A definitive diagnosis of an infarcted accessory spleen was made, and the patient was discharged on day 5 after surgery symptom-free. (Korean J Gastroenterol 2021;78:183-187)
( Hyuk Yoon ),( Suk-kyun Yang ),( Hoonsub So ),( Ko Eun Lee ),( Sang Hyoung Park ),( Sung-ae Jung ),( Joong Haeng Choh ),( Cheol Min Shin ),( Young Soo Park ),( Nayoung Kim ),( Dong Ho Lee ) 대한내과학회 2019 The Korean Journal of Internal Medicine Vol.34 No.1
Background/Aims: The Crohn’s and Colitis Knowledge (CCKNOW) score does not reflect updated knowledge relating to inflammatory bowel disease (IBD). The aim of this study was to develop, validate, and apply a novel tool to measure disease-related knowledge in IBD patients. Methods: A questionnaire composed of 24 items regarding knowledge of IBD was developed: Inflammatory Bowel Disease Knowledge (IBD-KNOW). Discriminate ability of IBD-KNOW was validated in three occupational groups (14 doctors, 20 nurses, and 19 clerks). The CCKNOW and IBD-KNOW were administered to IBD patients. Factors affecting the level of IBD-related knowledge were analyzed. Results: The median Inflammatory Bowel Disease Knowledge (IBD-KNOW) score was significantly different among the three groups for validation (22 doctors, 20 nurses, and five clerks; p < 0.001). The IBD-KNOW showed excellent internal consistency (Cronbach α = 0.952) and high correlation with CCKNOW (Spearman ρ = 0.827, p = 0.01). A total of 200 IBD patients (120 Crohn’s disease, 80 ulcerative colitis) completed questionnaires. Multivariate analysis showed that a higher IBD-KNOW score than the median was associated with hospitalization history (odds ratio [OR], 2.625; p = 0.003), high education level (OR, 2.498; p = 0.012), and information acquired from patient organization (OR, 3.305, p = 0.035). Conclusions: The IBD-KNOW demonstrated excellent test characteristics. Hospitalization history, education level, and information acquired from patient organization play an important role in correct IBD-related knowledge.
구창혁,Hong Hwichan,Im Pyung Won,Kim Hoonsub,Lee Chaedong,Jin Xuanzhen,안병의,이우승,Im Hyung-Jun,Paek Sun Ha,박원철 나노기술연구협의회 2020 Nano Convergence Vol.7 No.20
Among the number of hyperthermia materials, magnetic nanoparticles have received much attention. In this work, we studied the heating characteristics of uniform Fe@Fe 3 O 4 core–shell nanoparticle under near-infrared laser irra‑ diation and external AC magnetic field applying. The Fe@Fe 3 O 4 core–shell nanoparticles were prepared by thermal decomposition of iron pentacarbonyl and followed by controlled oxidation. The prepared uniform particles were fur‑ ther coated with dimercaptosuccinic acid to make them well dispersed in water. Near-infrared derived photothermal study of solutions containing a different concentration of the core–shell nanoparticles was made by using 808 nm laser Source. Additionally, magnetic hyperthermia ability of the Fe@Fe 3 O 4 nanoparticle at 150 kHz and various oersted (140–180 Oe) condition was systemically characterized. The Fe@Fe 3 O 4 nanoparticles which exhibited effective photo and magnetic hyperthermia are expected to be used in biomedical application.
Chronic intractable diarrhea caused by gastrointestinal mastocytosis
( Hyungil Seo ),( Sang Hyoung Park ),( Jeong-sik Byeon ),( Chang Gok Woo ),( Seung-mo Hong ),( Kiju Chang ),( Hoonsub So ),( Minseob Kwak ),( Wan Soo Kim ),( Jeong-mi Lee ),( Dong-hoon Yang ),( Kyung- 대한장연구학회 2016 Intestinal Research Vol.14 No.3
As mast cells have been highlighted in the pathogenesis of diarrhea-predominant irritable bowel syndrome, a new term “mastocytic enterocolitis” was suggested by Jakate and colleagues to describe an increase in mucosal mast cells in patients with chronic intractable diarrhea and favorable response to treatment with antihistamines. Although it is not an established disease entity, two cases have been reported in the English medical literature. Here, for the first time in Asia, we report another case of chronic intractable diarrhea caused by gastrointestinal mastocytosis. The patient was a 70-year-old male with chronic intractable diarrhea for 3 months; the cause of the diarrhea remained obscure even after exhaustive evaluation. However, biopsy specimens from the jejunum were found to have increased mast cell infiltration, and the patient was successfully treated with antihistamines.