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Sureshkumar S, Lee HC, Lee S, Jung SK, Kim D, Oh KB, Yang H, Jo YJ, Lee S, Byun SJ. Preliminary Study to Investigate the Effect of Lactobacillus Reuteri Administration on Growth Performance, Immunological, Gut Microbiome and Intestinal Mucosa of Chicken. Braz J Poult Sci 2022. [DOI: 10.1590/1806-9061-2022-1640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- S Sureshkumar
- National Institute of Animal Science, Republic of Korea; Dankook University, Republic of Korea
| | - HC Lee
- National Institute of Animal Science, Republic of Korea
| | - S Lee
- National Institute of Animal Science, Republic of Korea
| | - SK Jung
- National Institute of Animal Science, Republic of Korea
| | - D Kim
- Sungkyunkwan University, Republic of Korea
| | - KB Oh
- National Institute of Animal Science, Republic of Korea
| | - H Yang
- National Institute of Animal Science, Republic of Korea
| | - YJ Jo
- National Institute of Animal Science, Republic of Korea
| | - S Lee
- Sungkyunkwan University, Republic of Korea
| | - SJ Byun
- National Institute of Animal Science, Republic of Korea
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Shim KN, Kim JI, Kim N, Kim SG, Jo YJ, Hong SJ, Shin JE, Kim GH, Park KS, Choi SC, Kwon JG, Kim JH, Kim HJ, Kim JW. The efficacy and safety of irsogladine maleate in nonsteroidal anti-inflammatory drug or aspirin-induced peptic ulcer and gastritis. Korean J Intern Med 2019; 34:1008-1021. [PMID: 29847892 PMCID: PMC6718769 DOI: 10.3904/kjim.2017.370] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Accepted: 02/21/2018] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND/AIMS Irsogladine maleate, an enhancer of gastric mucosal protective factors, has demonstrated its efficacy for various gastric mucosal injuries. The aim of this study was to evaluate the efficacy and safety of irsogladine for prevention of nonsteroidal anti-inflammatory drugs (NSAIDs) or aspirin-induced peptic ulcer and gastritis. METHODS In this multicenter, randomized, double-blind, exploratory clinical trial, 100 patients over 50 years of age who needed continuous NSAIDs or aspirin for more than 8 weeks were randomly assigned to either test group (irsogladine maleate 2 mg, twice daily, 39 patients for full analysis) or placebo group (37 patients for full analysis). Primary outcomes were incidence of peptic ulcer and ratio of modified Lanza score (MLS) 2 to 4. Secondary outcome was the number of acute erosions confirmed by endoscopy at 8 weeks. Adverse effects were also compared. RESULTS There were no significant differences in gastric protective effects between test and placebo groups. However, two cases of peptic ulcer in the placebo group but none in the test group were observed. These two cases of peptic ulcer were Helicobacter pylori-negative. In addition, H. pylori-negative group showed significant changes in MLS score (p = 0.0247) and edema score (p = 0.0154) after the treatment compared to those before treatment in the test group. There was no significant difference in adverse events between the two groups. CONCLUSION The efficacy of irsogladine maleate was found in H. pylori-negative group, suggesting its potential as a protective agent against NSAIDs or aspirin-induced peptic ulcer and gastritis.
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Affiliation(s)
- Ki-Nam Shim
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Ewha Medical Research Institute, Seoul, Korea
| | - Jin Il Kim
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Nayoung Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
- Correspondence to Nayoung Kim, M.D. Department of Internal Medicine, Seoul National University Bundang Hospital, 82 Gumi-ro 173beon-gil, Bundang-gu, Seongnam 13620, Korea Tel: +82-31-787-7008, Fax: +82-31-787-4051 E-mail:
| | - Sang Gyun Kim
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - Yun Ju Jo
- Department of Internal Medicine, Eulji University School of Medicine, Seoul, Korea
| | - Su Jin Hong
- Digestive Disease Center and Research Institute, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Jeong Eun Shin
- Department of Internal Medicine, Dankook University College of Medicine, Cheonan, Korea
| | - Gwang Ha Kim
- Department of Internal Medicine, Pusan National University School of Medicine, and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Kyung Sik Park
- Department of Internal Medicine, Keimyung University School of Medicine, Daegu, Korea
| | - Suck Chei Choi
- Department of Internal Medicine, Wonkwang University College of Medicine and Digestive Disease Research Institute, Iksan, Korea
| | - Joong Goo Kwon
- Department of Internal Medicine, Daegu Catholic University School of Medicine, Daegu, Korea
| | - Jie-Hyun Kim
- Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Hyun Jin Kim
- Department of Internal Medicine, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Ji Won Kim
- Department of Internal Medicine, SMG-SNU Boramae Medical Center, Seoul, Korea
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Min KW, Kim DH, Son BK, Kim DH, Kim EK, Seo J, Ahn SB, Jo YJ, Park YS, Ha J. A High Ki67/BCL2 Index Could Predict Lower Disease-Free and Overall Survival in Intestinal-Type Gastric Cancer. Eur Surg Res 2017; 58:158-168. [PMID: 28273657 DOI: 10.1159/000448945] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 08/08/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND The heterogeneity of gastric cancer makes the identification of potential prognostic indicators particularly important. The Ki67 and BCL2 proteins are known prognostic markers for different types of cancer. Ki67 is associated with cell proliferation, whereas BCL2 has antiproliferative roles. A combined marker based on these opposite functions might provide improved prognostic information in gastric cancer. METHOD Ki67 and BCL2 expression was assessed in 276 gastric adenocarcinoma tissue microarrays. A Ki67/BCL2 index based on the relative expression of each protein was divided into low- and high-risk groups using receiver operating characteristic curves. RESULTS A high Ki67/BCL2 index significantly correlated with advanced stage, recurrence, intestinal type, high histologic grade, and lymphatic and perineural invasion (all p < 0.05). Univariate and multivariate analyses revealed a significant relationship between disease-free or overall survival and the Ki67/BCL2 index in intestinal-type gastric cancer (all p < 0.05). CONCLUSIONS A combined marker using Ki67 and BCL2 could be a useful indicator for predicting survival in patients with intestinal-type gastric cancer.
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Affiliation(s)
- Kyueng-Whan Min
- Department of Pathology, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Republic of Korea
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Park YS, Kim SH, Ryu HY, Cho YK, Jo YJ, Son TI, Hong YO. Hybrid Natural Orifice Transluminal Endoscopic Surgery with Sentinel Lymph Node Navigation for Deep Early Gastric Cancer in the Fundic Region. Clin Endosc 2016; 49:298-302. [PMID: 27020308 PMCID: PMC4895934 DOI: 10.5946/ce.2015.114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 10/14/2015] [Accepted: 10/14/2015] [Indexed: 12/17/2022] Open
Abstract
For patients refusing surgical treatment for deep early gastric cancer, hybrid natural orifice transluminal endoscopic surgery with sentinel lymph node navigation is a potential treatment option, particularly when the anatomic location of the cancer has low probability of lymph node metastasis. We report a case of deep early gastric cancer of the fundus beyond the endoscopic submucosal dissection indication that was treated by hybrid natural orifice transluminal endoscopic surgery with sentinel lymph node navigation. In a conventional approach, a total gastrectomy would have been needed; however, the patient refused surgical intervention. In this case, since the patient showed no positivity of the sentinel lymph node on intraoperative navigation, laparoscopic basin lymph node dissection was not performed. Hybrid natural orifice transluminal endoscopic surgery might be considered for specific regions such as the safety zone where lymph node metastases are less likely to occur.
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Affiliation(s)
- Yoon Suk Park
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Seong Hwan Kim
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Hee Yun Ryu
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Young Kwan Cho
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Yun Ju Jo
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Tae Il Son
- Department of Surgery, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Young Ok Hong
- Department of Pathology, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
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Park EK, Park YS, Park DR, Jung SA, Han DS, Jang BI, Kim YH, Kim WH, Jo YJ, Lee KH, Lee WM, Kim EK, Koo HS. Cytokine expression of microscopic colitis including interleukin-17. Gut Liver 2016; 9:381-7. [PMID: 25071069 PMCID: PMC4413972 DOI: 10.5009/gnl13439] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Background/Aims Microscopic colitis is characterized by chronic watery diarrhea with specific pathological changes that can be diagnosed by microscopic examination. We performed immunohistochemical analysis of proinflammatory cytokines to investigate the pathogenic mechanism of microscopic colitis. Methods This study consisted of six patients with lymphocytic colitis, six patients with collagenous colitis, and six patients with functional diarrhea but normal pathology. We performed an immunohistochemical analysis of the colonic mucosal biopsies to assess the expression of cyclo-oxygenase-2, interleukin-17, nuclear factor-κB, interferon-γ, inducible nitric oxide synthase, and tumor necrosis factor-α. We compared the quantity score of immunohistochemical staining among the groups. Results The microscopic colitis group showed significantly higher expression of cyclo-oxygenase-2, interleukin-17, nuclear factor-κB, and interferon-γ compared with the control group. Cytokine expression was similar between collagenous colitis and lymphocytic colitis. However, the expression of cyclo-oxygenase-2 was higher in collagenous colitis. Conclusions Proinflammatory cytokines, including interleukin-17 and interferon-γ, are highly expressed in microscopic colitis. The expression of cyclo-oxygenase-2 was higher in collagenous colitis than in lymphocytic colitis. This study is the first on interleukin-17 expression in microscopic colitis patients.
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Affiliation(s)
- Eun-Kyoung Park
- Department of Internal Medicine, Eulji University School of Medicine, Korea
| | - Young Sook Park
- Department of Internal Medicine, Eulji University School of Medicine, Korea
| | - Dae Rim Park
- Department of Internal Medicine, Eulji University School of Medicine, Korea
| | - Sung Ae Jung
- Department of Internal Medicine, Ewha University School of Medicine, Seoul, Korea
| | - Dong Soo Han
- Department of Internal Medicine, Hanyang University School of Medicine, Seoul, Korea
| | - Byung Ik Jang
- Department of Internal Medicine, Yeungnam University School of Medicine, Daegu, Department of Internal Medicine, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Young Ho Kim
- Department of Internal Medicine, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Won Ho Kim
- Department of Internal Medicine, Yonsei University School of Medicine, Seoul, Korea
| | - Yun Ju Jo
- Department of Internal Medicine, Eulji University School of Medicine, Korea
| | - Ki Ho Lee
- Department of Biochemistry, Eulji University School of Medicine, Korea
| | - Won Mi Lee
- Department of Pathology, Eulji University School of Medicine, Korea
| | - Eun Kyung Kim
- Department of Pathology, Eulji University School of Medicine, Korea
| | - Hae Soo Koo
- Department of Pathology, Ewha Womans University School of Medicine, Seoul, Korea
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Ha JH, Park YS, Seon CS, Son BK, Ahn SB, Jo YK, Kim SH, Jo YJ, Kim JH, Han JH, Jung YY, Chung SH. Increased risk of asymptomatic gallstones in patients with ulcerative colitis. Intest Res 2015; 13:122-7. [PMID: 25931996 PMCID: PMC4414753 DOI: 10.5217/ir.2015.13.2.122] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 10/24/2014] [Accepted: 10/24/2014] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND/AIMS The relationship between Crohn's disease and gallstones is established. However, the prevalence and risk factors for gallstones in patients with ulcerative colitis (UC) are not yet well understood. The aim of this study was to evaluate the prevalence and risk factors of gallstones in patients with UC. METHODS This study was a retrospective single center study. A total of 87 patients with UC and 261 healthy controls were enrolled. Age, sex, and body mass index were matched. To investigate risk factors, the extent of UC, duration of disease, number of hospital admissions, and number of steroid treatments in patients with UC were evaluated. RESULTS The prevalence of gallstones in patients with UC was 13.8%, whereas that in healthy controls was only 3.1% (P<0.001). For patients with UC, patients ≥50 years of age had a 3.6-times higher risk of gallstones compared to that in those <50 years of age, and the difference was statistically significant (odds ratio, 3.60; confidence interval, 1.03-12.61) in univariate analysis. There were no statistically significant disease-related risk factors for gallstones in UC patients. CONCLUSIONS This is the first study of gallstone prevalence in Korean UC patients. In this study, patients with UC had a higher prevalence of gallstones compared to that in well-matched healthy controls. Age seemed to be a possible risk factor, and more studies are needed. Further prospective, large-scale studies will be required to confirm the risk factors for gallstones in UC patients.
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Affiliation(s)
- Jung Hoon Ha
- Department of Gastroenterology, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Young Sook Park
- Department of Gastroenterology, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Choon Sik Seon
- Department of Gastroenterology, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Byung Kwan Son
- Department of Gastroenterology, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Sang Bong Ahn
- Department of Gastroenterology, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Young Kwan Jo
- Department of Gastroenterology, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Seong Hwan Kim
- Department of Gastroenterology, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Yun Ju Jo
- Department of Gastroenterology, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Jung Hwan Kim
- Department of Family Medicine, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Jee Hye Han
- Department of Family Medicine, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Yoon Young Jung
- Department of Radiology, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Sook Hee Chung
- Department of Gastroenterology, Ajou University College of Medicine, Suwon, Korea
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Song YK, Park YS, Seon CS, Lim HJ, Son BK, Ahn SB, Jo YK, Kim SH, Jo YJ, Lee JH, Kim SC. Alcohol drinking increased the risk of advanced colorectal adenomas. Intest Res 2015; 13:74-9. [PMID: 25691846 PMCID: PMC4316226 DOI: 10.5217/ir.2015.13.1.74] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 08/27/2014] [Accepted: 09/13/2014] [Indexed: 02/07/2023] Open
Abstract
Background/Aims Age, sex, gene and life style are modulating risks for colon cancer. Although alcohol intake may impact on colorectal adenoma, clear association has not been established yet. We aimed to investigate effects of alcohol consumption on the characteristics of colorectal adenoma. Methods Patients who underwent colonoscopic polypectomy of colorectal adenoma in the department of gastroenterology of Eulji hospital through 2005 to 2012, having both blood tests and ultrasound or abdominal CT examination were enrolled. The alcohol drinking patients were subdivided into normal or abnormal laboratory group, and alcoholic liver diseases group. Results 212 patients with colorectal adenoma were analyzed; advanced adenoma and multiple adenoma were found in 68 (32.0%) and 79 (37.2%) patients. When compared to the nondrinker group (120/212 patients), the alcohol drinker group (92/212 patients) represented significantly high odds ratios (ORs) for advanced adenoma (OR, 2.697; P=0.002), and multiple adenoma (OR, 1.929; P=0.039). Among alcohol drinker (92 patients), the ORs of advanced adenoma were 6.407 (P=0.003) in alcoholic liver diseases group (17 patients), 3.711 (P=0.002) in the alcohol drinker with abnormal lab (24 patients), and 2.184 (P=0.034), in the alcohol drinker with normal lab (51 patients) compared to nondrinker group. Conclusions This study showed that alcohol drinking may influence on the development of advanced colorectal adenoma and multiplicity. Especially in the group with alcoholic liver diseases and with abnormal lab presented significantly higher ORs of advanced adenoma.
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Affiliation(s)
- Yoon Kyung Song
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
| | - Young Sook Park
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
| | - Choon Sik Seon
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
| | - Hye Jin Lim
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
| | - Byung Kwan Son
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
| | - Sang Bong Ahn
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
| | - Young Kwan Jo
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
| | - Seong Hwan Kim
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
| | - Yun Ju Jo
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
| | - Ji Hyun Lee
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
| | - Seung Chan Kim
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
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Affiliation(s)
- Yun Ju Jo
- Division of Gastroenterology, Department of Internal Medicine, Eulji University School of Medicine, Eulji General Hospital, Seoul, Korea
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Ha J, Son BK, Ahn SB, Jo YK, Kim SH, Jo YJ, Park YS, Jung YY. Osler-Weber-Rendu disease presenting as recurrent portosystemic encephalopathy in a 75-year-old female patient. Korean J Gastroenterol 2015; 65:57-61. [PMID: 25603856 DOI: 10.4166/kjg.2015.65.1.57] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Osler-Weber-Rendu disease is a rare autosomal dominant disorder of fibrovascular tissues, characterized by a classic triad of mucocutaneous telangiectasias, recurrent hemorrhages, and a familial occurrence. Portosystemic encephalopathy in a patient with Osler-Weber-Rendu disease is rare, but we experienced a case presenting with recurrent portosystemic encephalopathy in Osler-Weber-Rendu disease. We report on a case of a 75-year-old female presenting with an altered mentality. Initial studies including brain imaging study did not reveal any specific cause for her mental status. She was diagnosed with the rare disease after a series of tests and received conservative treatment. Her neurological status recovered fully without complication after conservative treatment and she was discharged after 18 hospital days. This case demonstrated an extremely rare case of Osler-Weber-Rendu disease presenting as portosystemic encephalopathy treated successfully with conservative treatment. For patients who have shown hepatic encephalopathy without a definite cause, we recommend evaluation for the possibility of Osler-Weber-Rendu disease. Conservative treatment based on treatment of advanced liver cirrhosis could be an alternative solution.
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Affiliation(s)
- Junghoon Ha
- Departments of Internal Medicine and Radiology, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Byoung Kwan Son
- Departments of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Sang Bong Ahn
- Departments of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Young Kwan Jo
- Departments of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Seong Hwan Kim
- Departments of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Yun Ju Jo
- Departments of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Young Sook Park
- Departments of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Yoon Young Jung
- Departments of Radiology, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
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Eom MJ, Kim K, Jo YJ, Yang JJ, Choi ES, Min BI, Park JH, Cheong SW, Kim JS. Dimerization-induced Fermi-surface reconstruction in IrTe2. Phys Rev Lett 2014; 113:266406. [PMID: 25615364 DOI: 10.1103/physrevlett.113.266406] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Indexed: 06/04/2023]
Abstract
We report a de Haas-van Alphen (dHvA) oscillation study on IrTe2 single crystals showing complex dimer formations. By comparing the angle dependence of dHvA oscillations with band structure calculations, we show distinct Fermi surface reconstruction induced by a 1/5-type and a 1/8-type dimerizations. This verifies that an intriguing quasi-two-dimensional conducting plane across the layers is induced by dimerization in both cases. A phase transition to the 1/8 phase with higher dimer density reveals that local instabilities associated with intra- and interdimer couplings are the main driving force for complex dimer formations in IrTe2.
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Affiliation(s)
- Man Jin Eom
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Kyoo Kim
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Y J Jo
- Department of Physics, Kyungpook National University, Daegu 702-701, Korea
| | - J J Yang
- Laboratory for Pohang Emergent Materials, Pohang University of Science and Technology, Pohang 790-784, Korea and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - E S Choi
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA
| | - B I Min
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - J-H Park
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - S-W Cheong
- Laboratory for Pohang Emergent Materials, Pohang University of Science and Technology, Pohang 790-784, Korea and Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Piscataway, New Jersey 08854, USA
| | - Jun Sung Kim
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
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Jo YJ, Kim YH, Jo YH, Seong JG, Chang SY, Van Tyne CJ, Lee WH. Microporous Ti implant compact coated with hydroxyapatite produced by electro-discharge-sintering and electrostatic-spray-deposition. J Nanosci Nanotechnol 2014; 14:8439-8444. [PMID: 25958542 DOI: 10.1166/jnn.2014.9933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A single pulse of 1.5 kJ/0.7 g of atomized spherical Ti powder from 300 μF capacitor was applied to produce the porous-surfaced Ti implant compact by electro-discharge-sintering (EDS). A solid core surrounded by porous layer was self-consolidated by a discharge in the middle of the compact in 122 μsec. Average pore size, porosity, and compressive yield strength of EDS Ti compact were estimated to be about 68.2 μm, 25.5%, and 266.4 MPa, respectively. Coatings with hydroxyapatite (HAp) on the Ti compact were conducted by electrostatic-spray-deposition (ESD) method. As-deposited HAp coating was in the form of porous structure and consisted of HAp particles which were uniformly distributed on the Ti porous structure. By heat-treatment at 700 degrees C, HAp particles were agglomerated each other and melted to form a highly smooth and homogeneous HAp thin film consisted of equiaxed nano-scaled grains. Porous-surfaced Ti implant compacts coated with highly crystalline apatite phase were successfully obtained by using the EDS and ESD techniques.
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Jo YJ, Park J, Lee G, Eom MJ, Choi ES, Shim JH, Kang W, Kim JS. Valley-polarized interlayer conduction of anisotropic Dirac fermions in SrMnBi2. Phys Rev Lett 2014; 113:156602. [PMID: 25375728 DOI: 10.1103/physrevlett.113.156602] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Indexed: 06/04/2023]
Abstract
We report the valley-selective interlayer conduction of SrMnBi(2) under in-plane magnetic fields. The c-axis resistivity of SrMnBi(2) shows clear angular magnetoresistance oscillations indicating coherent interlayer conduction. Strong fourfold variation of the coherent peak in the c-axis resistivity reveals that the contribution of each Dirac valley is significantly modulated by the in-plane field orientation. This originates from anisotropic Dirac Fermi surfaces with strong disparity in the momentum-dependent interlayer coupling. Furthermore, we found a signature of broken valley symmetry at high magnetic fields. These findings demonstrate that a quasi-two-dimensional anisotropic Dirac system can host a valley-polarized interlayer current through magnetic valley control.
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Affiliation(s)
- Y J Jo
- Department of Physics, Kyungpook National University, Daegu 702-710, Korea
| | - Joonbum Park
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - G Lee
- Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Man Jin Eom
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - E S Choi
- National High Magnetic field Laboratory, Florida State University, Tallahassee, Florida 32310, USA
| | - Ji Hoon Shim
- Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - W Kang
- Department of Physics, Ewha Womans University, Seoul 120-750, Korea
| | - Jun Sung Kim
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
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Jung JH, Kim SH, Kim MJ, Cho YK, Ahn SB, Son BK, Jo YJ, Park YS. A case report of primary duodenal tuberculosis mimicking a malignant tumor. Clin Endosc 2014; 47:346-9. [PMID: 25133123 PMCID: PMC4130891 DOI: 10.5946/ce.2014.47.4.346] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/11/2013] [Accepted: 08/27/2013] [Indexed: 12/17/2022] Open
Abstract
Tuberculosis remains a serious infectious disease with primary features of pulmonary manifestation in Korea. However, duodenal tuberculosis is rare in gastrointestinal cases of extrapulmonary tuberculosis. Here, we report a case of primary duodenal tuberculosis mistaken as a malignant tumor and diagnosed with QuantiFERON-TB GOLD (Cellestis Ltd.) in an immunocompetent male patient.
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Affiliation(s)
- Ji Hye Jung
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Seong Hwan Kim
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Min Jeong Kim
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Young Kwan Cho
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Sang Bong Ahn
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Byoung Kwan Son
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Yun Ju Jo
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Young Sook Park
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
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14
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Kim YL, Park YS, Park EK, Park DR, Choi GS, Ahn SB, Kim SH, Jo YJ. Refractory duodenal Crohn's disease successfully treated with infliximab. Intest Res 2014; 12:66-9. [PMID: 25349566 PMCID: PMC4204694 DOI: 10.5217/ir.2014.12.1.66] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 05/18/2012] [Accepted: 05/26/2012] [Indexed: 01/11/2023] Open
Abstract
Crohn's disease (CD) may involve any part of the gastrointestinal tract, from the mouth to the anus. Approximately >90% of cases occur in the small bowel and colon. Upper gastrointestinal involvement, especially duodenal manifestation, is relatively rare. Therefore, adequate medical treatment for duodenal CD has not yet been established. We report a case of CD with duodenal involvement. A 46-year-old man with Crohn's ileocolitis presented to our hospital with right upper quadrant pain. An endoscopy showed a deep excavated ulcer with deformity at the duodenal bulb, and he was initially treated with azathioprine (1 mg/kg), Pentasa (3.0 g/day), and a proton pump inhibitor for 1 year. However, the deep ulcer did not heal. Therefore, infliximab infusion therapy was initiated, and the duodenal lesion completely resolved on follow-up esophagogastroduodenoscopy. We report a case of duodenal CD that completely resolved following infliximab infusion, with a review of the literature.
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Affiliation(s)
- You Lim Kim
- Department of Internal Medicine, Eulji University School of Medicine, Eulji Medical Center, Seoul, Korea
| | - Young Sook Park
- Department of Internal Medicine, Eulji University School of Medicine, Eulji Medical Center, Seoul, Korea
| | - Eun Kyoung Park
- Department of Internal Medicine, Eulji University School of Medicine, Eulji Medical Center, Seoul, Korea
| | - Dae Rim Park
- Department of Internal Medicine, Eulji University School of Medicine, Eulji Medical Center, Seoul, Korea
| | - Gyu Sik Choi
- Department of Internal Medicine, Eulji University School of Medicine, Eulji Medical Center, Seoul, Korea
| | - Sang Bong Ahn
- Department of Internal Medicine, Eulji University School of Medicine, Eulji Medical Center, Seoul, Korea
| | - Seong Hwan Kim
- Department of Internal Medicine, Eulji University School of Medicine, Eulji Medical Center, Seoul, Korea
| | - Yun Ju Jo
- Department of Internal Medicine, Eulji University School of Medicine, Eulji Medical Center, Seoul, Korea
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15
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Seon CS, Park YS, Jung YM, Choi JH, Son BK, Ahn SB, Kim SH, Jo YJ. Gastric outlet obstruction due to gastric amyloidosis mimicking malignancy in a patient with ankylosing spondylitis. Clin Endosc 2013; 46:651-5. [PMID: 24340260 PMCID: PMC3856268 DOI: 10.5946/ce.2013.46.6.651] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 11/30/2012] [Accepted: 02/12/2013] [Indexed: 01/01/2023] Open
Abstract
Amyloidosis is a group of disorders characterized by the extracellular accumulation of insoluble, fibrillar proteins in various organs and tissues. It is classified, on the basis of the identity of the precursor protein, as primary, secondary, or familial amyloidosis. Gastrointestinal amyloidosis usually presents as bleeding, ulceration, malabsorption, protein loss, and diarrhea. However, gastric amyloidosis with gastric outlet obstruction mimicking linitis plastica is rare. We report a case of gastrointestinal amyloidosis with gastric outlet obstruction in a patient with ankylosing spondylitis. The patient was indicated for subtotal gastrectomy because of the aggravation of obstructive symptoms, but refused the operation and was transferred to another hospital. Three months later, the patient died of aspiration pneumonia during medical treatment.
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Affiliation(s)
- Choon Sik Seon
- Department of Internal Medicine, Eulji University School of Medicine, Seoul, Korea
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16
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Ok JM, Jo YJ, Kim K, Shishidou T, Choi ES, Noh HJ, Oguchi T, Min BI, Kim JS. Quantum oscillations of the metallic triangular-lattice antiferromagnet PdCrO2. Phys Rev Lett 2013; 111:176405. [PMID: 24206508 DOI: 10.1103/physrevlett.111.176405] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2013] [Revised: 07/15/2013] [Indexed: 06/02/2023]
Abstract
We report the electronic and transport properties of the triangular antiferromagnet PdCrO(2) at high magnetic fields up to 33 T, using measurements of the de Haas-van Alphen oscillations and the Hall resistivity. The de Haas-van Alphen oscillations below the magnetic ordering temperature T(N) reveal several two-dimensional Fermi surfaces of smaller size than those found in nonmagnetic PdCoO(2), consistent with the band structure calculations. This evidences Fermi surface reconstruction due to the 120° helical ordering of the localized Cr spins, suggesting significant coupling of the itinerant electrons to the underlying spin texture. This induces the nonlinear Hall resistivity at low temperatures via the magnetic breakdown in the reconstructed Fermi surface. Furthermore, such a coupling leads to the unconventional anomalous Hall effects near T(N) due to the field-induced spin chirality at high magnetic fields.
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Affiliation(s)
- Jong Mok Ok
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
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17
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Jung HK, Hong SJ, Jo YJ, Jeon SW, Cho YK, Lee KJ, Lee JS, Park HJ, Shin ES, Lee SH, Han SU. [Updated guidelines 2012 for gastroesophageal reflux disease]. Korean J Gastroenterol 2013; 60:195-218. [PMID: 23089906 DOI: 10.4166/kjg.2012.60.4.195] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In 2010, a Korean guideline for the management of gastroesophageal reflux disease (GERD) was made by the Korean Society of Neurogastroenterology and Motility, in which the definition and diagnosis of GERD were not included. The aim of this guideline was to update the clinical approach to the diagnosis and management of GERD in adult patients. This guideline was developed by the adaptation process of the ADAPTE framework. Twelve guidelines were retrieved from initial queries through the Appraisal of Guidelines for Research & Evaluation II process. Twenty-seven statements were made as a draft and revised by modified Delphi method. Finally, 24 consensus statements for the definition (n=4), diagnosis (n=7) and management (n=13) of GERD were developed. Multidisciplinary experts participated in the development of the guideline, and the external review of the guideline was conducted at the finalization phase.
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Affiliation(s)
- Hye-Kyung Jung
- Department of Internal Medicine, Ewha Womans University School of Medicine, Seoul, Korea
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18
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Kim JB, Kim SH, Cho YK, Ahn SB, Jo YJ, Park YS, Lee JH, Kim DH, Lee H, Jung YY. A case of colon perforation due to enteropathy-associated T-cell lymphoma. World J Gastroenterol 2013; 19:1841-1844. [PMID: 23555174 PMCID: PMC3607762 DOI: 10.3748/wjg.v19.i11.1841] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 11/15/2012] [Indexed: 02/06/2023] Open
Abstract
Enteropathy-associated T-cell lymphoma (EATL) is an extremely rare disease, which is often related to gluten-sensitive enteropathy. It is an uncommon intestinal lymphoma with very poor prognosis and high mortality rate. In the absence of specific symptoms or radiological findings, it is difficult to diagnose early. Major complications of EATL have been known as intestinal perforation or obstruction, and only 5 cases of EATL are reported in South Korea. In this study, we report a case of 71-year-old male with symptoms of diarrhea, which later it progressed into cancer perforation of the colon. The initial colonoscopic findings were normal and computed tomography scan demonstrated a segmental wall thickening of the distal ascending colon with nonspecific multiple small lymphnodes, along the ileocolic vessels, but no signs of mass or obstruction. The histologic findings of resected specimen confirmed EATL type II. Patient expired two weeks after the operation. Therefore, we emphasize the need of random biopsy in the presence of normal mucosa appearance on colonoscopy for the early diagnosis of EATL.
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19
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Oh SK, Song CG, Jang T, Kim KC, Jo YJ, Kwak JS. Reduction of gate leakage current on AlGaN/GaN high electron mobility transistors by electron-beam irradiation. J Nanosci Nanotechnol 2013; 13:1738-1740. [PMID: 23755582 DOI: 10.1166/jnn.2013.6987] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This study examined the effect of electron-beam (E-beam) irradiation on the AIGaN/GaN HEMTs for the reduction of gate leakage. After E-beam irradiation, the gate leakage current significantly decreased from 2.68 x 10(-8) A to 4.69 x 10(-9) A at a drain voltage of 10 V. The maximum drain current density of the AIGaN/GaN HEMTs with E-beam irradiation increased 14%, and the threshold voltage exhibited a negative shift, when compared to that of the AIGaN/GaN HEMTs before E-beam irradiation. These results strongly suggest that the reduction of gate leakage current resulted from neutralization nitrogen vacancies and removing of oxygen impurities.
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Affiliation(s)
- S K Oh
- Department of Printed Electronics Engineering (WCU), Sunchon National University, Jeonnam 540-742, Korea
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20
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Cho KO, Jo YJ, Song BK, Oh JW, Kim YS. Colon transit time according to physical activity and characteristics in South Korean adults. World J Gastroenterol 2013; 19:550-555. [PMID: 23382635 PMCID: PMC3558580 DOI: 10.3748/wjg.v19.i4.550] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 09/03/2012] [Accepted: 11/28/2012] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate factors contributing to the colon transit time (CTT), physical activity and characteristics were examined.
METHODS: Forty-seven Korean adults (males, n = 23; females, n = 24) took a capsule containing 20 radio-opaque markers to measure the CTT. The subjects used an accelerometer to measure the physical activity and underwent a bioelectrical impedance analysis to determine the physical characteristics. Macro-nutrient was also surveyed.
RESULTS: The mean total CTTs (TCTT) in the males and females were 8.8 and 24.7 h (P = 0.002), respectively. In the male subjects, the right CTT (3.5 ± 4.9 h vs 10.0 ± 11.6 h, P = 0.023) and recto-sigmoid CTT (4.4 ± 4.7 vs 13.6 ± 12.5 h, P = 0.004) were significantly shorter and the total energy expenditure (637.6 ± 44.3 kcal vs 464.3 ± 64.9 kcal, P = 0.003), total activity count (247 017 ± 75 022 count vs 178 014 ± 75 998 count, P = 0.003), energy expenditure of light intensity (148.5 ± 6.9 kcal vs 120.0 ± 16.8 kcal, P = 0.006), energy expenditure of moderate intensity (472.0 ± 36.2 kcal vs 281.4 ± 22.2 kcal, P < 0.001), fat intake (65.5 ± 23.3 g vs 51.2 ± 17.4 g, P = 0.010), and water consumption (1714.3 ± 329.4 g vs 1164.7 ± 263.6 g, P = 0.009) were significantly higher than in the female subjects. Regarding correlations, when adjusted for gender, fiber (r = -0.545, P < 0.001) and water intake (r = -0.257, P < 0.05) correlated significantly with the TCTT in all subjects. In addition, the body mass index (r = -0.424, P < 0.05) and fiber intake (r = -0.417, P < 0.05) in the males as well as the fiber intake (r = -0.655, P < 0.001) in the females showed significant correlations with the TCTT.
CONCLUSION: The subjects showed significant gender differences in the TCTT, right CTT, and recto-sigmoid CTT. Furthermore, the intake of the fiber and water contributed to the CTT.
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21
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Jang YW, Park YS, Kim SH, Jo YJ, Jo YK, Ahn SB, Seo YS, Hong YO. A Case of Crohn's Disease Having Normal Delivery after Infliximab Treatment during Early Pregnancy. Korean J Gastroenterol 2013; 61:37-41. [DOI: 10.4166/kjg.2013.61.1.37] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Young Woo Jang
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Young Sook Park
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Seong Hwan Kim
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Yun Ju Jo
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Young Kwan Jo
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Sang Bong Ahn
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Yong Soo Seo
- Department of Obstetrics & Gynecology, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
| | - Young Ok Hong
- Department of Pathology, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
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22
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Jo YJ, Lee EJ, Oh JW, Moon CM, Cho DK, Cho YH, Byun KH, Eun LY. Retraction: Aortic dissection and rupture in a child. Korean Circ J 2012; 42:511. [PMID: 22870089 PMCID: PMC3409404 DOI: 10.4070/kcj.2012.42.7.511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Yun Ju Jo
- Department of Pediatric Cardiology, Kwandong University Myongji Hospital Cardiovascular Center, Goyang, Korea
| | - Eun Jeong Lee
- Department of Pediatric Cardiology, Kwandong University Myongji Hospital Cardiovascular Center, Goyang, Korea
| | - Jin Won Oh
- Department of Pediatric Cardiology, Kwandong University Myongji Hospital Cardiovascular Center, Goyang, Korea
| | - Chang Min Moon
- Department of Pediatric Cardiology, Kwandong University Myongji Hospital Cardiovascular Center, Goyang, Korea
| | - Deok Kyu Cho
- Department of Adult Cardiology, Kwandong University Myongji Hospital Cardiovascular Center, Goyang, Korea
| | - Yun Hyeong Cho
- Department of Adult Cardiology, Kwandong University Myongji Hospital Cardiovascular Center, Goyang, Korea
| | - Ki Hyun Byun
- Department of Adult Cardiology, Kwandong University Myongji Hospital Cardiovascular Center, Goyang, Korea
| | - Lucy Youngmin Eun
- Department of Pediatric Cardiology, Kwandong University Myongji Hospital Cardiovascular Center, Goyang, Korea
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23
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Hong CH, Jo YJ, Kim HA, Park MJ, Kwak JS. Improved electrical and optical properties of ITO/Ag/ITO films by using electron beam irradiation and their application to ultraviolet light-emitting diode as highly transparent p-type electrodes. J Nanosci Nanotechnol 2012; 12:4163-4167. [PMID: 22852364 DOI: 10.1166/jnn.2012.5934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We have investigated the effect of insertion of a Ag layer in ITO film as well as electron beam irradiation to the multilayer films on the electrical and optical properties of the ITO-based multilayer deposited by magnetron sputtering method at room temperature. Inserting a very thin Ag layer between ITO layers resulted in a significant decrease in sheet resistance and increased the optical band gap of the ITO/Ag/ITO multilayer to 4.35 eV, followed by a high transparency of approximately 80% at a wavelength of 375 nm. We have also fabricated ultraviolet light-emitting diodes (LED) by using the ITO/Ag/ITO p-type electrode with/without electron beam irradiation. The results show that the UV-LEDs having ITO/Ag/ITO p-electrode with electron beam irradiation produced 19% higher optical output power due to the low absorption of light in the p-type electrode.
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Affiliation(s)
- C H Hong
- Department of Printed Electronics Engineering (WCU), Sunchon National University, Jeonnam 540-742, Korea
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24
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Chung MY, Park YS, Ryu SR, Ahn SB, Kim SH, Jo YJ, Han JK, Joo JE. A case of colonic mucinous adenocarcinoma in 19-year-old male patient. Clin Endosc 2012; 45:103-7. [PMID: 22741141 PMCID: PMC3363130 DOI: 10.5946/ce.2012.45.1.103] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Revised: 10/31/2011] [Accepted: 11/23/2011] [Indexed: 12/28/2022] Open
Abstract
Colorectal cancer is rare in teenagers, especially without known risk factors. Colon cancer in young age is more likely to be diagnosed at advanced-stage, to present unfavorable tumor histology such as mucinous carcinoma, and poor outcome. We report a case of sporadic mucinous adenocarcinoma of the colon in a 19-year-old male patient without any risk factors. He complained of severe left abdominal pain that developed 1 month ago. He had a distended abdomen with severe tenderness on the left lower quadrant. A distal descending colon mass causing mechanical obstruction was observed on abdominal computed tomography. Emergency colonoscopy showed a large, fungating mass obstructing the lumen at 40 cm from the anal verge. Biopsy of the colonic mass suggested a mucinous adenocarcinoma. After decompression by colonic stent, the patient was transferred to the general surgery department for left hemicolectomy. The lesion was confirmed to be a mucinous adenocarcinoma (7.0×4.5 cm). For hereditary nonpolyposis colorectal cancer evaluation, immunohistochemical staining for MLH1 and MSH2 was normal. Reverse transcription polymerase chain reaction analysis did not detect microinstability in any of the markers tested. The patient had no familial history of cancer. Mucinous adenocarcinoma has high frequencies of poor differentiation, advanced tumor stage, loss of mismatch repair gene expression, and increased MUC2 expression. A mucinous histology is considerably more frequent in children and adolescent than in adults. Adequate invasive study is also necessary for young age patients.
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Affiliation(s)
- Mi Yeon Chung
- Department of Internal Medicine, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea
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25
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Seon CS, Park YS, Park SH, Ryu SR, Jo YJ, Kim SH, Son BK, Ahn SB. A Case of Oral-contraceptive Related Ischemic Colitis in Young Woman. Clin Endosc 2011; 44:129-32. [PMID: 22741124 PMCID: PMC3363065 DOI: 10.5946/ce.2011.44.2.129] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2011] [Revised: 08/26/2011] [Accepted: 08/31/2011] [Indexed: 01/24/2023] Open
Abstract
Ischemic colitis is generally considered a disease of the elderly. The causes of ischemic colitis include low-flow states due to cardiac dysfunction or hypovolemia and certain medications including estrogen. Here we report a case of ischemic colitis in a 26-year-old woman. She had no specific medical history except taking oral-contraceptives for a long time. The mechanism of estrogen-induced ischemic colitis is not clearly understood. But we recommend that oral-contraceptives should be considered as a cause of ischemic colitis in young women.
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Affiliation(s)
- Choon Sik Seon
- Department of Internal Medicine, Eulji Medical Center, Eulji University College of Medicine, Seoul, Korea
| | - Young Sook Park
- Department of Internal Medicine, Eulji Medical Center, Eulji University College of Medicine, Seoul, Korea
| | - Se Hwan Park
- Department of Internal Medicine, Eulji Medical Center, Eulji University College of Medicine, Seoul, Korea
| | - Sang Ryol Ryu
- Department of Internal Medicine, Eulji Medical Center, Eulji University College of Medicine, Seoul, Korea
| | - Yun Ju Jo
- Department of Internal Medicine, Eulji Medical Center, Eulji University College of Medicine, Seoul, Korea
| | - Seong Hwan Kim
- Department of Internal Medicine, Eulji Medical Center, Eulji University College of Medicine, Seoul, Korea
| | - Byoung Kwan Son
- Department of Internal Medicine, Eulji Medical Center, Eulji University College of Medicine, Seoul, Korea
| | - Sang Bong Ahn
- Department of Internal Medicine, Eulji Medical Center, Eulji University College of Medicine, Seoul, Korea
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26
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Park J, Lee G, Wolff-Fabris F, Koh YY, Eom MJ, Kim YK, Farhan MA, Jo YJ, Kim C, Shim JH, Kim JS. Anisotropic Dirac fermions in a Bi square net of SrMnBi2. Phys Rev Lett 2011; 107:126402. [PMID: 22026779 DOI: 10.1103/physrevlett.107.126402] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Indexed: 05/31/2023]
Abstract
We report the observation of highly anisotropic Dirac fermions in a Bi square net of SrMnBi(2), based on a first-principles calculation, angle-resolved photoemission spectroscopy, and quantum oscillations for high-quality single crystals. We found that the Dirac dispersion is generally induced in the (SrBi)(+) layer containing a double-sized Bi square net. In contrast to the commonly observed isotropic Dirac cone, the Dirac cone in SrMnBi(2) is highly anisotropic with a large momentum-dependent disparity of Fermi velocities of ~8. These findings demonstrate that a Bi square net, a common building block of various layered pnictides, provides a new platform that hosts highly anisotropic Dirac fermions.
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Affiliation(s)
- Joonbum Park
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
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27
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Jung YM, Jo YJ, Ahn SB, Son BK, Kim SH, Park YS, Bae JH, Cho YK. Clinical effectiveness of percutaneous angioplasty for acute and chronic mesenteric ischemia: a six case series. Korean J Gastroenterol 2011; 57:243-8. [PMID: 21519178 DOI: 10.4166/2011.57.4.243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Intestinal ischemia is divided into three categories, namely, acute mesenteric ischemia (AMI), chronic mesenteric ischemia (CMI), and colonic ischemia. AMI can result from arterial or venous thrombi, emboli, and vasoconstriction secondary to low-flow states. It is an urgent condition which can result in high mortality rate. The predominant causative factor of CMI is stenosis or occlusion of the mesenteric arterial circulation, and it is characterized by postprandial abdominal pain and weight loss. Surgery is the treatment of choice for intestinal ischemia. However, it has been recently reported that percutaneous transluminal angioplasty with stent placement and/or thrombolysis is an effective therapy in various types of mesenteric ischemia. We report six cases of mesenteric ischemia which were successfully treated by percutaneous angioplasty, and review the literature from South Korea.
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Affiliation(s)
- Yu Min Jung
- Department of Internal Medicine, Eulji University School of Medicine, Seoul, Korea
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28
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Jo YJ, Lee EJ, Oh JW, Moon CM, Cho DK, Cho YH, Byun KH, Eun LY. Aortic dissection and rupture in a child. Korean Circ J 2011; 41:156-9. [PMID: 21519516 PMCID: PMC3079137 DOI: 10.4070/kcj.2011.41.3.156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Revised: 07/01/2010] [Accepted: 07/16/2010] [Indexed: 11/23/2022] Open
Abstract
After developing sudden severe chest pain, an 11-year-old boy presented to the emergency room with chest pain and palpitations and was unable to stand up. The sudden onset of chest pain was first reported while swimming at school about 30 minutes prior to presentation. Arterial blood pressure (BP) was 150/90 mmHg, heart rate was 120/minute, and the chest pain was combined with shortness of breath and diaphoresis. During the evaluation in the emergency room, the chest pain worsened and abdominal pain developed. An aortic dissection was suspected and a chest and abdomen CT was obtained. The diagnosis of aortic dissection type B was established by CT imaging. The patient went to surgery immediately with BP control. He died prior to surgery due to aortic rupture. Here we present this rare case of aortic dissection type B with rupture, reported in an 11-year-old Korean child.
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Affiliation(s)
- Yun Ju Jo
- Department of Pediatric Cardiology, Kwandong University Myongji Hospital Cardiovascular Center, Goyang, Korea
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Jung JY, Park YS, Baek DH, Choi JH, Jo YJ, Kim SH, Son BK, Chae JD, Kim DH, Jung YY. [The prevalence of Yersinia infection in adult patients with acute right lower quadrant pain]. Korean J Gastroenterol 2011; 57:14-8. [PMID: 21258196 DOI: 10.4166/kjg.2011.57.1.14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND/AIMS Clinical manifestations of intestinal yersiniosis include enterocolitis, mesenteric adenitis, and terminal ileitis presenting with fever, right lower quadrant pain, and leukocytosis. According to a previous Korean study in 1997, Yersinia was revealed in two among 15 adult patients with mesenteric adenitis (13%). However, recent reports on the prevalence of Yersinia infection in adult patients are few. The aim of this study was to investigate the prevalence of Yersinia infection in adult patients with acute right lower quadrant pain. METHODS Adult patients (>18 years) who visited Eulji medical center, due to acute right lower quadrant pain were enrolled prospectively from December 2007 to July 2009. Abdominal CT, stool culture, serologic test for Yersinia, and Widal test were performed. RESULTS Among 115 patients, 5 patients were excluded due to positive Widal test or salmonella culture. In 110 patients, abdominal CT showed right colitis in 20 (18.2%), terminal ileitis in 16 (14.5%), mesenteric adenitis in 13 (11.8%), acute appendicitis in 10 (9.1%), acute diverticulitis in 7 (6.4%), non specific mucosal edema in 36 (32.7%) and no specific lesion in 8 (7.3%). Two (1.8%) of the 110 patients had antibodies to Yersinia. One patient showed acute enteritis and the other patient was diagnosed with acute appendicitis and underwent appendectomy. No Yersinia species were grown on stool or tissue culture. CONCLUSIONS Nowadays, among adult Korean patients presenting with acute right lower quadrant pain, there have been few incidences of Yersinia infection.
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Affiliation(s)
- Jun Young Jung
- Departments of Gastroenterology, Eulji Medical Center, Eulji University School of Medicine, Seoul, Korea
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Bae JH, Kim SH, Ahn SB, Son BK, Jo YJ, Park YS, Jung YM, Chang YS. A Case of Idiopathic Sclerosing Mesenteritis with Retroperitoneal Fibrosis. Korean J Gastroenterol 2011; 58:221-5. [DOI: 10.4166/kjg.2011.58.4.221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- June Ho Bae
- Department of Internal Medicine, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Seong Hwan Kim
- Department of Internal Medicine, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Sang Bong Ahn
- Department of Internal Medicine, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Byoung Kwan Son
- Department of Internal Medicine, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Yun Ju Jo
- Department of Internal Medicine, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Young Sook Park
- Department of Internal Medicine, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Yu Min Jung
- Department of Internal Medicine, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Yeon Soo Chang
- Department of Surgery, Eulji General Hospital, Eulji University College of Medicine, Seoul, Korea
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Yang HJ, Cho YK, Jo YJ, Jung YY, Choi SA, Lee SH. Successful recanalization of acute superior mesenteric artery thrombotic occlusion with primary aspiration thrombectomy. World J Gastroenterol 2010; 16:4112-4. [PMID: 20731029 PMCID: PMC2928469 DOI: 10.3748/wjg.v16.i32.4112] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Prompt revascularization of the superior mesenteric artery (SMA) thrombotic occlusion can prevent intestinal infarction and decrease necrosis of the bowel segment. Herein, we describe two cases who underwent successful endovascular recanalization for acute SMA thrombosis using a primary aspiration thrombectomy because of possible consequent laparotomy for survey of bowel viability. The two patients had dramatic pain relief immediately after the procedure and remained symptom-free during the follow-up period.
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Chung SH, Son BK, Park YS, Jo YJ, Kim SH, Jun DW, Cheong ES, Lee WM, Ju JE. Inflammatory myoglandular polyps causing hematochezia. Gut Liver 2010; 4:146-8. [PMID: 20479930 DOI: 10.5009/gnl.2010.4.1.146] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2009] [Accepted: 09/18/2009] [Indexed: 11/04/2022] Open
Abstract
We report herein three cases of inflammatory myoglandular polyp (IMGP) presenting as hematochezia. The polyps had pedunculated, red, and smooth features, and were 12, 12, and 15 mm in diameter and located in the sigmoid colon, transverse colon, and rectum, respectively. Endoscopic polypectomies were performed. Histologic examination of the recovered specimens revealed inflammatory granulation in the lamina propria mucosa, proliferation of smooth muscle, and hyperplastic glands with cystic dilatation. The three colon polyps were finally diagnosed both clinically and histologically as IMGP. Endoscopists should bear in mind that a polyp featuring endoscopic findings of pedunculation or semipedunculation; a red, smooth, spherical, and hyperemic surface; and patchy mucosa exudation and erosion is likely to be an IMGP.
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Affiliation(s)
- Sook Hee Chung
- Department of Internal Medicine, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea
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Jun DW, Park JH, Park YS, Kang JS, Kim EK, Kim KT, Son BK, Kim SH, Jo YJ, Park YS. The role of nitric oxide in the expression of renal aquaporin 2 in a cirrhotic rat model: does an AVP-independent mechanism exist for the regulation of AQP2 expression? Dig Dis Sci 2010; 55:1296-304. [PMID: 19517235 DOI: 10.1007/s10620-009-0852-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2008] [Accepted: 05/08/2009] [Indexed: 12/09/2022]
Abstract
The aquaporin (AQP) water channel is expected to play a decisive role of hyponatremia and water retention in cirrhotic patients. Despite the importance of the water channel, however, previous findings vary widely when it concerns AQP2 of the kidneys in subjects with cirrhosis. The purpose of this study was to investigate the expression of AQP2 in the distal renal tubule in cirrhosis, and the presence of the nitric oxide-AQP2 signaling pathway as a possible vasopressin-aquaporin-independent pathway. Sixty male Wister rats were assigned to six groups: (1) control; (2) TAA (thioacetamide); (3) TAA with nitric oxide donor; (4) TAA with nitric oxide inhibitor; (5) TAA with HMG CoA reductase inhibitor; (6) TAA with tetrahydrobiopterin. Immunohistochemical staining for AQP2, real-time polymerase chain reaction (PCR) for AQP2 and 3, citrulline assay, and renal cGMP concentration were measured. The AQP2-positivity of cirrhotic rats were higher than the controls (P < 0.05). The AQP2-positivity decreased in the nitric oxide donor group, but the proportion rose back up when the subjects were injected with the nitric oxide inhibitor (P < 0.05). The expression of AQP2 and AQP3 mRNA was also found to show an increase in the cirrhotic group as compared with the normal controls (P < 0.05). The cirrhotic group administered with nitric oxide donor showed a significant decline in the expression of the mRNA. The control group's cGMP concentration was lower than that of the cirrhotic group (P < 0.05), but a comparison of the two groups injected with nitric oxide modulators, such as statin and BH4, did not show significant differences in the cGMP concentration level. The expression of AQP2 of the kidneys increased in the cirrhotic rats. AQP2 had relations to the activity changes of nitric oxide synthetase.
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Affiliation(s)
- Dae Won Jun
- Department of Internal Medicine, Eulji Medical Center, Eulji University College of Medicine, Seoul, Korea
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Chung SH, Park YS, Jo YJ, Kim SH, Jun DW, Son BK, Jung JY, Baek DH, Kim DH, Jung YY, Lee WM. Asymptomatic lymphangioma involving the spleen and retroperitoneum in adults. World J Gastroenterol 2009; 15:5620-3. [PMID: 19938204 PMCID: PMC2785067 DOI: 10.3748/wjg.15.5620] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Lymphangioma, a benign neoplasm of the lymphatic system, is common in children but rare in adults. Its clinical manifestations include abdominal pain, nausea, vomiting and a palpable mass. However, abdominal sonography or abdominal computed tomography (CT) scan can also incidentally reveal lymphangioma. A larger or symptomatic lymphangioma is treated with total resection to prevent recurrence, infection, torsion and enlargement. Although lymphangioma rarely becomes malignant, its prognosis is generally good. We report a cystic lymphangioma of the spleen and retroperitoneum, which was incidentally found in a 56-year-old man who was hospitalized due to a colon mass. Physical examination showed no specific findings. Abdominal CT revealed a 5.7 cm, non-enhanced multilobulated cystic mass with multiple septa in the spleen and a 10 cm lobulated cystic mass in the paraaortic area. Splenectomy and retroperitoneal resection of the cystic mass were conducted. The endothelium of splenic and retroperitoneal cyst was immunohistochemically stained with D2-40 antibody. The patient was finally diagnosed with splenic cystic and retroperitoneal cavernous lymphangioma.
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Yang DJ, Park YS, Yu YH, Jo YJ, Kim SH, Jung YY, Hwang YH, Jun DW. [A case of renal vein thrombosis in a patient with ulcerative colitis]. Korean J Gastroenterol 2009; 54:248-51. [PMID: 19844145 DOI: 10.4166/kjg.2009.54.4.248] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Venous thrombosis and thromboembolism appear to occur more often in patient with inflammatory bowel disease (IBD). The cause of thrombotic complications in IBD is generally considered to be associated with hypercoagulable conditions. Its prevalence rate ranges from 1% to 8% in clinical studies and rises to 39% in autopsy, but the renal vein thrombosis is very rare complication in ulcerative colitis patient. A 24-year-old man presented with intermittent abdominal pain and hematochezia for 6 months and recently developed pitting edema for few weeks. He was diagnosed as severe ulcerative colitis involving whole colon combined with thrombosis in both renal veins by colonoscopy and computed tomography scan of abdomen. We used steroid for the treatment of ulcerative colitis and both intravenous lower molecular weight heparin and warfarin for renal vein thrombosis. His symptoms were improved after treatment and maintained with mesalazine and warfarin. Follow-up abdominal CT scan showed complete resolution of both renal vein thrombosis. Currently he has been followed up for 2 years with oral mesalazine.
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Affiliation(s)
- Dong Jin Yang
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, Korea
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36
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Yu YH, Park YS, Kim SH, Son BK, Jun DW, Jo YJ, Ryu YS, Kim HS. [Sialadenosis in a patient with alcoholic fatty liver developing after heavy alcohol drinking]. Korean J Gastroenterol 2009; 54:50-4. [PMID: 19696551 DOI: 10.4166/kjg.2009.54.1.50] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Sialadenosis is a unique form of non-inflammatory, non-neoplastic bilateral salivary gland disorder characterized by recurrent painless swelling which usually occurs in parotid glands. Alcoholism is one of the main causes of sialadenosis along with diabetes, bulimia, and other idiopathic causes. The prognosis is verified according to the degree of liver function. We present a case of a 46 year-old man who had alcoholic fatty liver disease diagnosed as alcoholic sialadenosis based on clinical points of recurrent bilateral parotid swelling after heavy alcohol drinking, computed tomography, and fine-needle aspiration biopsy. After stopping alcohol drinking and treated with conservative treatment, he got improved without specific sequela.
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Affiliation(s)
- Yeon Hwa Yu
- Department of Internal Medicine, Eulji University School of Medicine, and Eulji University Eulji General Hospital, Seoul, Korea
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37
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Yu YH, Son BK, Jun DW, Kim SH, Jo YJ, Park YS, Hong BW, Joo JE. [A case of desmoid tumor presenting as intra-abdominal abscess]. Korean J Gastroenterol 2009; 53:315-9. [PMID: 19458469 DOI: 10.4166/kjg.2009.53.5.315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Desmoid tumor is a rare benign tumor derived from fibrous sheath or musculoaponeurotic structure. The tumor is benign histologically but considered as malignant clinically because it has high propensity on infiltrative growth with local invasion and tendency to recurrence after local excision. Especially, when this tumor happens to be in the intra-abdomen, the prognosis is worse because it can cause intestinal obstruction, ureter obstruction and, fistula formation. It also can invade major vessels in abdomen. This tumor occurs more frequently in patients with familial adenomatous polyposis (FAP), in post-partume women, and at old surgical incision site. However, in this case, the patient had neither previous surgery nor a FAP history. We report a rare case of the young male patient who presented with an acute abdomen and underwent laparotomy and was found to have an intra-abdominal desmoid tumor with abscess formation.
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Affiliation(s)
- Yeon Hwa Yu
- Departments of Internal Medicine, Surgery, Eulji University School of Medicine, Nowon-gu, Seoul, Korea
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38
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Son TJ, Kim DH, Jo YJ, Chae JD, Hong BH, Kang JH, Lee TS, Han JG. Is the Yersinia enterocolitica Possible Infectious Agent in Acute Appendicitis? J Korean Surg Soc 2009. [DOI: 10.4174/jkss.2009.76.4.221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tae Joon Son
- Department of Surgery, Eulji Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Dong Hee Kim
- Department of Surgery, Eulji Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Yun Ju Jo
- Department of Gatroenterology, Eulji Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Jeong Don Chae
- Department of Laboratory Medicine, Eulji Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Boo Hwan Hong
- Department of Surgery, Eulji Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Jae Hee Kang
- Department of Surgery, Eulji Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Tae Seok Lee
- Department of Surgery, Eulji Hospital, Eulji University College of Medicine, Seoul, Korea
| | - Jun Gil Han
- Department of Surgery, Eulji Hospital, Eulji University College of Medicine, Seoul, Korea
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Choi JH, Jun DW, Lee HH, Song MH, Kim SH, Jo YJ, Park YS, Jung JY, Lee WM. Giant hyperplasia of the caudate lobe in a patient with liver cirrhosis: case report and literature review. Gut Liver 2008; 2:205-8. [PMID: 20485648 DOI: 10.5009/gnl.2008.2.3.205] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2007] [Accepted: 05/06/2008] [Indexed: 11/04/2022] Open
Abstract
The caudate lobe often exhibits enlargement and nodularity in cases of cirrhosis, which makes differentiation of hepatocellular carcinoma from other mass-like lesions of the caudate lobe difficult in cirrhotic patients. A 12x6 cm mass-like enlargement of the caudate lobe was incidentally found by computed tomography in a 38-year-old man suffering from alcoholic liver cirrhosis. Magnetic resonance imaging, liver colloidal scan, and sonoguided liver biopsy were used for the differential diagnosis. A literature review revealed two case reports, all of which (like ours) presented with an enlarged caudate lobe supplied with blood via a branch of the portal vein. Therefore, in cases of giant hyperplasia of the caudate lobe, confirmation of the caudate lobe blood supply and the enhancement pattern might be important for the differentiation.
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Affiliation(s)
- Jeong Ho Choi
- Division of Gastroenterology, Department of Internal Medicine, Eulji Medical Center, Eulji University College of Medicine, Seoul, Korea
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Choi JH, Jo YJ, Gong SJ, Hong BW, Lee HJ, Son BK, Jun DW, Kim SH, Park YS, Seok JW. Unicentric castleman disease is not clearly distinguished from multicentric type: a case report. ACTA ACUST UNITED AC 2008; 8:256-9. [PMID: 18765316 DOI: 10.3816/clm.2008.n.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Castleman disease (CD) was recently classified as a unicentric hyaline vascular variant, unicentric plasma cell variant, and multicentric plasma cell variant. It is rare that unicentric CD is presented as multiple retroperitoneal lymphadenopathy. The clinical manifestations and prognosis depends on histologic type. We report an unusual case of CD with multiple retroperitoneal lymphadenopathy, which had unicentric hyaline vascular variant histologically but was clinically multicentric. The patient experienced anemia, weight loss, elevated C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR), POEMS (polyneuropathy, organomegaly, endocrinopathy, monoclonal gammopathy, and skin changes syndrome), and plasmacytosis in bone marrow without human herpesvirus-8 or HIV. After exploratory laparotomy and lymphadenectomy under presumptive diagnosis of CD, the patient's symptoms recovered, and CRP and ESR decreased. Therefore, we suggest that unicentric CD is not clearly distinguished from multicentric, the type in this report, focusing on the useful role of CRP, ESR, and positron emission tomography/computed tomography in the disease activity of CD.
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Affiliation(s)
- Jeoung Ho Choi
- Department of Internal Medicine, Eulji University College of Medicine, Seoul, South Korea
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Park YS, Jun DW, Kim SH, Lee HH, Jo YJ, Song MH, Kim NI, Lee JS. Colonoscopy evaluation after short-term anti-tuberculosis treatment in nonspecific ulcers on the ileocecal area. World J Gastroenterol 2008; 14:5051-8. [PMID: 18763289 PMCID: PMC2742934 DOI: 10.3748/wjg.14.5051] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the efficacy of colonoscopy follow-up after short-term anti-tuberculosis treatment in patients with nonspecific ulcers on ileocecal areas being suspicious of tuberculous colitis.
METHODS: We prospectively analyzed the colonoscopic findings before and after short term anti-tuberculosis treatment in 18 patients with nonspecific ulcers on the ileocecal area and compared them with 7 patients of confirmed tuberculous colitis by acid-fast bacilli or caseating granuloma on colonic biopsy.
RESULTS: Mean duration for short-term follow-up was 107.3 d with combined chemotherapy containing isoniazid, rifampicin, ethambutol and pyrazinamide. Seven patients with tuberculous colitis showed complete healing of active ulcers after short-term medication. After short-term anti-tuberculosis treatment, follow-up colonoscopy findings divided 18 patients with nonspecific ulcers into two groups by ulcer state. One is the “suspicious tuberculous colitis group” showing healing of ulcers and erosions and another is the “suspicious inflammatory bowel disease group” showing active ulcers with or without aggravation of the lesion. Finally, all 9 of the “suspicious tuberculous colitis group” were diagnosed as tuberculous colitis showing no recurrence of ulcers after termination of 9 mo of anti-tuberculosis medication. Patients of the “suspicious inflammatory bowel disease group” were finally diagnosed as Crohn’s disease or nonspecific colonic ulcers during long-term follow up.
CONCLUSION: Follow-up colonoscopy shows a healing stage ulcer or scarring change without an active ulcer with just 2 mo to 3 mo of medication in patients with tuberculous colitis. Colonoscopy follow-up after short term anti-tuberculosis trial in patients with nonspecific ulcers on the ileocecal area is valuable in making early differential diagnosis of tuberculous colitis.
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Jo YJ, Choi HS, Jun DW, Lee OY, Kang JS, Park IG, Jung KH, Hahm JS. The effects of a new human leukocyte elastase inhibitor (recombinant guamerin) on cerulein-induced pancreatitis in rats. Int Immunopharmacol 2008; 8:959-66. [DOI: 10.1016/j.intimp.2008.02.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2007] [Revised: 02/05/2008] [Accepted: 02/22/2008] [Indexed: 02/06/2023]
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Balicas L, Jo YJ, Shu GJ, Chou FC, Lee PA. Local moment, itinerancy, and deviation from Fermi-liquid behavior in NaxCoO2 for 0.71< or = x < or =0.84. Phys Rev Lett 2008; 100:126405. [PMID: 18517893 DOI: 10.1103/physrevlett.100.126405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2007] [Indexed: 05/26/2023]
Abstract
Here we report the observation of Fermi surface (FS) pockets via the Shubnikov-de Haas effect in NaxCoO2 for x=0.71 and 0.84, respectively. Our observations indicate that the FS expected for each compound intersects their corresponding Brillouin zones, as defined by the previously reported superlattice structures, leading to small reconstructed FS pockets, but only if a precise number of holes per unit cell is localized. For 0.71< or = x < 0.75 the coexistence of itinerant carriers and localized S=1/2 spins on a paramagnetic triangular superlattice leads at low temperatures to the observation of a deviation from standard Fermi-liquid behavior in the electrical transport and heat capacity properties, suggesting the formation of some kind of quantum spin-liquid ground state.
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Affiliation(s)
- L Balicas
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA
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44
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Jung JY, Song MH, Park YS, Jo YJ, Kim SH, Jun DW, Kim DH, Lee WM. [A case of mucinous noncystic carcinoma of the pancreas]. Korean J Gastroenterol 2008; 51:204-208. [PMID: 18451696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Mucinous (colloid) carcinoma is defined as pools of stromal extracellular mucin containing scanty, floating carcinoma cells. It is a well-defined entity in breast or large bowel. However, mucinous noncystic carcinoma of the pancreas (MNCC) is uncommon, comprising between 1% and 3% of all carcinomas of the pancreas. In the past, MNCC generally had been categorized together with ordinary ductal adenocarcinoma or misdiagnosed as mucinous cystadenocarcinoma or signet-ring cell carcinoma. The new WHO classification lists MNCC as a variant of ductal adenocarcinoma. Herein, we report a 32-year-old woman with incidentally found pancreatic body mass who underwent subtotal pancreatectomy. She was diagnosed as MNCC histologically.
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Affiliation(s)
- Jun Young Jung
- Department of Internal Medicine, Eulji University School of Medicine, Seoul, Korea
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45
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Kang W, Osada T, Jo YJ, Kang H. Interlayer magnetoresistance of quasi-one-dimensional layered organic conductors. Phys Rev Lett 2007; 99:017002. [PMID: 17678182 DOI: 10.1103/physrevlett.99.017002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2006] [Indexed: 05/16/2023]
Abstract
We studied the interlayer magnetoresistance of the representative quasi-one-dimensional (Q1D) layered organic conductor, (TMTSF)2PF6, over the full range of magnetic field orientations in three dimensions, and constructed a stereographic conductivity plot. Our results show that the previously reported angular-dependent magnetoresistance phenomena in Q1D conductors are closely related to one another in intermediate field orientations. Based on a comparison with theories, we can conclude that the Lebed resonance is the only fundamental effect and that other effects result from the modulation of the Lebed resonance amplitude. Most of the observed phenomena can be explained within the framework of the conventional Fermi liquid; however, the anomalous enhancement of the interlayer conductivity under a field parallel to the conducting planes suggests the existence of a new electron state.
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Affiliation(s)
- W Kang
- Department of Physics, Ewha Womans University, Seoul, Korea.
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46
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Jo YJ, Balicas L, Capan C, Behnia K, Lejay P, Flouquet J, Mydosh JA, Schlottmann P. Field-induced Fermi surface reconstruction and adiabatic continuity between antiferromagnetism and the hidden-order state in URu2Si2. Phys Rev Lett 2007; 98:166404. [PMID: 17501440 DOI: 10.1103/physrevlett.98.166404] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2006] [Indexed: 05/15/2023]
Abstract
Shubnikov-de Haas oscillations reveal at high fields an abrupt reconstruction of the Fermi surface within the hidden-order (HO) phase of URu2Si2. Taken together with reported Hall effect results, this implies an increase in the effective carrier density and suggests that the field suppression of the HO state is ultimately related to destabilizing a gap in the spectrum of itinerant quasiparticles. While hydrostatic pressure favors antiferromagnetism in detriment to the HO state, it has a modest effect on the complex H-T phase diagram. Instead of phase separation between HO and antiferromagnetism our observations indicate adiabatic continuity between both orderings with field and pressure changing their relative weight.
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Affiliation(s)
- Y J Jo
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA
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47
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Song MH, Jun DW, Kim SH, Lee HH, Jo YJ, Park YS. Recurrent duodenal ulcer and cholangitis associated with ectopic opening of bile duct in the duodenal bulb. Gastrointest Endosc 2007; 65:324-5; discussion 325. [PMID: 17258995 DOI: 10.1016/j.gie.2006.06.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2006] [Accepted: 06/08/2006] [Indexed: 02/08/2023]
Affiliation(s)
- Moon Hee Song
- Department of Internal Medicine, Eulji University College of Medicine, Eulji Medical Center, Seoul, Korea
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48
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Park JY, Park YS, Kim SY, Park DR, Jo YJ, Kim SH, Song MH, Lee HH. [A case of ischemic colitis in a patient with Takayasu's arteritis]. Korean J Gastroenterol 2007; 49:110-3. [PMID: 17322791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Ischemic colitis is one of the most common intestinal ischemic injury in which more than 90% of patient are over 60 year-old. It results from impaired perfusion of blood to the bowel and is rarely caused by vasculitis such as systemic lupus erythematosus, polyarteritis nodosa, and Takayasu's arteritis. Takayasu's arteritis affects the aortic arch, medium-sized and large arteries but rarely involves inferior mesenteric artery. We report a case of Takayasu's arteritis involving inferior mesenteric artery which developed ischemic colitis in a 70 year old female. To the author's knowledge this is the first case report in Korea. A 70 year old woman who had suffered from Takayasu's arteritis for 5 years was admitted for sudden abdominal pain and hematochezia. On sigmoidoscopy, there were multiple segmental longitudinal ulcerations around splenic flexure and diffuse hemorrhagic edematous mucosa from descending colon to sigmoid colon. On abdominal CT angiography, inferior mesenteric artery was not traced. We diagnosed it as ischemic colitis combined with Takayasu's arteritis. After the conservative treatment, abdominal pain and hematochezia disappeared. She was followed up to 2 years without recurrence of symptoms.
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Affiliation(s)
- Ji Young Park
- Department of Internal Medicine, Eulji University College of Medicine, Eulji Medical Center, Nowon-Gu, Seoul, Korea
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49
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Balicas L, Analytis JG, Jo YJ, Storr K, Zandbergen H, Xin Y, Hussey NE, Chou FC, Lee PA. Shubnikov-de Haas effect in the metallic state of Na0.3CoO2. Phys Rev Lett 2006; 97:126401. [PMID: 17025986 DOI: 10.1103/physrevlett.97.126401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2006] [Indexed: 05/12/2023]
Abstract
Shubnikov-de Haas oscillations for two well-defined frequencies, corresponding, respectively, to areas of 0.8 and 1.36% of the first Brillouin zone, were observed in single crystals of Na(0.3)CoO2. The existence of Na superstructures in Na0.3CoO2, coupled with this observation, suggests the possibility that the periods are due to the reconstruction of the large Fermi surface around the Gamma point. An alternative interpretation in terms of the long sought-after epsilon'(g) pockets is also considered but found to be incompatible with existing specific heat data.
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Affiliation(s)
- L Balicas
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32306, USA
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50
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Byun YH, Jo YJ, Kim SC, Lee JS, Shin WY, Park YS, Kim SH, Lee HH, Song MH. [Clinical factors that predicts successful eradication of Helicobacter pylori]. Korean J Gastroenterol 2006; 48:172-9. [PMID: 17047432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
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. We investigated other clinical factors predicting the successful eradication of H. pylori. METHODS From January 2004 to March 2005, 195 patients with documented H. pylori infection received proton pump inhibitor (PPI)-based triple therapy for one week and were assessed for the underlying chronic illnesses, smoking, alcohol habit, therapeutic indication and compliance. RESULTS The intention-to-treat (ITT) eradication rates were 69.2%, while per protocol (PP) analysis with 169 patients showed an initial eradication rate of 79.9%. The eradication rates of H. pylori according to the underlying disease were 73.9% (17/23) in diabetes, 66.7% (18/27) in hypertension, 66.7% (2/3) in renal disease, 100% (9/9) in liver disease, 63.7% (7/11) in cardiovascular disease and 64.3% (9/14) in chronic NSAIDs user. There was no statistical difference in the eradication rates according to the therapeutic indication, underlying disease, sex, age, smoking, alcohol, and PPI. However, the eradication rate was statistically lower in patients with multiple underlying diseases. Eradication rate was significantly higher in patients with good compliance than in those with poor compliance in taking medications (p<0.05). CONCLUSIONS Underlying chronic disease does not affect the H. pylori eradication rate significantly. In clinical practice, apart from antibiotic resistance test, drug compliance is the most important factor affecting the H. pylori eradication rate.
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Affiliation(s)
- Young Hye Byun
- Department of Internal Medicine, Eulji University College of Medicine, No-won-gu, Seoul, Korea
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