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<SUP>18</SUP>F-FDG PET-CT에서 진단된 갑상선 우연종의 악성종양 발견율 및 특징
이강영,고건<SUP>1<.SUP>,김선국<SUP>1<.SUP>,고진철<SUP>1<.SUP>,김행수,최상용,박신희,박용휘<SUP>2<.SUP>,Kang Young Rhee,Gun Koh,<SUP>1<.SUP>,Sun Kuk Kim,<SUP>1<.SUP>,Jin Chul Koh,<SUP>1<.SUP>,Haeng Soo Kim,Sang Yong Choi,Shin 대한갑상선-내분비외과학회 2008 The Koreran journal of Endocrine Surgery Vol.8 No.1
<B>Purpose: </B>PET-CT is often used to differentiate benign or malignant thyroid incidentalomas. In this retrospective study, we evaluated whether the <SUP>18</SUP>F-FDG uptake pattern and PET-CT findings improved accuracy over the standardized uptake value (SUV). <B>Methods:</B> <SUP>18</SUP>F-FDG PET-CT was performed on 2,178 subjects from August, 2004, to October, 2007, in Sung-ae Hospital. PET-CT was performed on 806 patients (37%) with suspected or known nonthyroidal cancer and 1,372 healthy subjects (63%) without a previous history of cancer. We investigated the clinical characteristics of patients, history, standardized uptake value (SUV), ultrasonography, and hormone levels in blood. Thyroidal cancer was confirmed by ultrasonography-guided fine needle aspiration and pathology after thyroid operation. <B>Results:</B> The prevalence of focal thyroid lesions on PET-CT was 8.8% (191/2178). Thyroid cancer confirmation was 7.9% (15/191). The maximum SUV of malignant thyroid lesions were significantly higher than that of benign lesions (7.00±3.08 vs. 4.49±1.84, P<0.001). <B>Conclusion:</B> PET-CT image interpretation that includes 18F-FDG uptake and SUV is better than PET-CT alone for differentiating benign and malignant lesions. Thyroid cancer risk increases as SUVmax levels increase. <B>(Ko</B><B></B><B>rean J Endocrine Surg 2008;8:38-42)</B>
Large Hepatocellular Adenoma Presenting with Iron Deficiency Anemia: A Case Report
Young Kwon Koh,Su Hyun Yoon,Sung Han Kang,Hyery Kim,Ho Joon Im,Suhyeon Ha,Jung-Man Namgoong,Kyung-Nam Koh 대한소아혈액종양학회 2023 Clinical Pediatric Hematology-Oncology Vol.30 No.1
Hepatocellular adenoma is an uncommon, benign liver tumor usually occurring in patients using estrogen or anabolic androgens and in those with a genetic disease, including glycogen storage disease. Hepatocellular adenomas can sometimes induce pain. However, it is usually asymptomatic. Moreover, few studies have reported cases of hepatocellular adenomas presenting with iron deficiency anemia. Herein, we re-port a pediatric case of a large hepatocellular adenoma, presenting with iron ther-apy-refractory iron deficiency anemia. A 14-year-old boy was diagnosed with hep-atocellular adenoma during an anemia work-up. Improvement in iron deficiency anemia was observed after tumor resection.
Jumping on water: Surface tension–dominated jumping of water striders and robotic insects
Koh, Je-Sung,Yang, Eunjin,Jung, Gwang-Pil,Jung, Sun-Pill,Son, Jae Hak,Lee, Sang-Im,Jablonski, Piotr G.,Wood, Robert J.,Kim, Ho-Young,Cho, Kyu-Jin American Association for the Advancement of Scienc 2015 Science Vol.349 No.6247
<P>Jumping on water is a unique locomotion mode found in semi-aquatic arthropods, such as water striders. To reproduce this feat in a surface tension-dominant jumping robot, we elucidated the hydrodynamics involved and applied them to develop a bio-inspired impulsive mechanism that maximizes momentum transfer to water. We found that water striders rotate the curved tips of their legs inward at a relatively low descending velocity with a force just below that required to break the water surface (144 millinewtons/meter). We built a 68-milligram at-scale jumping robotic insect and verified that it jumps on water with maximum momentum transfer. The results suggest an understanding of the hydrodynamic phenomena used by semi-aquatic arthropods during water jumping and prescribe a method for reproducing these capabilities in artificial systems.</P>
( Young Kyung Sung ),( Geum Youn Gwak ),( Moon Seok Choi ),( Kwang Chul Koh ),( Seung Woon Paik ),( Byung Chul Yoo ),( Joon Hyeok Lee ) The Editorial Office of Gut and Liver 2012 Gut and Liver Vol.6 No.4
Intestinal bypass surgery, particularly jejuno-ileal bypass surgery, performed for the purpose of weight reduction may cause an unexpected exacerbation of nonalcoholic steatohepatitis (NASH). Here, we report a case of NASH caused by small intestinal bacterial overgrowth, which developed after jejuno-colic bypass surgery and resolved dramatically after surgical correction. (Gut Liver 2012;6:520-523)
Koh, Hye Jin,Jang, Sang Hun,Kim, Chul Young,Shin, Sung Chul,Kim, Yun-Hi,Kwon, Soon-Ki American Scientific Publishers 2012 Journal of Nanoscience and Nanotechnology Vol.12 No.5
<P>New semiconductors having naphthalene and anthracene cores with hexylated bithiophene side units, 2,6-bis(5'-hexylbithiophen-2'-yl)naphthalene (HBT-NA) and 2,6-bis(5'-hexylbithiophen-2'-yl)anthracene (HBT-AN), were synthesized. HBT-AN and HBT-NA were characterized using FT-IR, 1H-NMR, Mass spectrum and elemental analysis. HBT-AN and HBT-NA showed well ordered crystalline with high thermal stabilities as evidenced by 5% weight loss at 447 degrees C for HBT-AN and 434 degrees C for HBT-NA. The closed packed structures between adjacent molecules were observed by studying UV-visible and photoluminescence (PL) in solution and film. The HOMO energy levels of HBT-NA and HBT-AN were found to be 5.47 eV and 5.42 eV, respectively. HBT-NA exhibits hole mobility of 8.4 x 10(-2) cm2Ns and on/off ratio of 5.6 x 10(5). HBT-AN shows 5.2 x 10(-2) cm2Ns and on/off ratio of 1.0 x 10(5).</P>
Splenic Littoral Cell Angioma with Hepatitis C Associated Liver Cirrhosis
Young Wha Koh,Bong-Hee Park,Sang-Ryung Lee,Heejin Lee,Joo Ryung Huh 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.78 No.3
Littoral cell angioma (LCA) of spleen is an uncommon vascular neoplasm of littoral cell origin. It is well established that LCA may be associated with other malignancy or autoimmune disorders. We describe a 34-year-old woman with viral hepatitis C associated liver cirrhosis who presented with the incidental finding of LCA. She showed ascites, esophageal varix and drowsy mentality. Abdominal computed tomography (CT) showed multiple benign looking nodules in both hepatic lobes, but no abnormality in spleen. Liver transplantation and splenectomy were performed. Microscopic findings revealed narrow anastomosing vascular channels lined with plump cells that exfoliated into the lumen. Immunohistochemically the lining cells were positive for CD31, CD68 and negative for CD34, consistent with LCA. Herein, a second case of an incidentally detected LCA with cirrhosis, viral hepatitis C associated in Korea is reported.
Osteoarthritis after Extension Block Technique for the Bony Mallet Finger
Sung Hoon Koh,Jung Hyun Park,Jin Soo Kim,Si Young, Roh,Kyung Jin Lee,Dong Chul Lee 대한수부외과학회 2021 대한수부외과학회지 Vol.26 No.4
Purpose: The purpose of this study is to investigate osteoarthritis after treatment of bony mallet finger using the extension block method. Methods: A single institutional retrospective review identified 163 patients with bony mallet between January 2012 and July 2020 and received surgical treatment using extension block method. The radiographic examination showed that the fracture line disappeared and a bridging callus was formed and bone union was confirmed. Fractures were classified according to the Tubiana classification method. Demographic data, fracture pattern, postoperative X-ray, and late complications were analyzed. Clinical outcomes were analyzed using Crawford’s criteria. Results: Surgical treatment was performed within an average of 8.8 days after injury, and the average follow-up period was 11.6 weeks. Osteoarthritis findings were confirmed by joint space narrowing and osteophytes on radiographic examination of 32 out of 163 patients. Age, sex, occupation, location of trauma, operation time, and type of fracture did not affect the osteoarthritis after extension block. Invasion of Kirschner wire (K-wire) to the fracture surface, family history of osteoarthritis, and operation time turned out to have a statistically significant effect on osteoarthritis (p<0.05). Conclusion: Fracture surface invasion of K-wire and family history of osteoarthritis affect osteoarthritis after treatment of bony mallet.
Young Chae Song,Jung Hui Woo,Sang Jo Kwon,Sung Cheol Koh 대한토목학회 2006 KSCE journal of civil engineering Vol.10 No.5
The microbial community structures of anaerobic sludge, alternately exposed to mesophilic and thermophilic condition, were investigated and their microbial activities under mesophilic and thermophilic conditions. PCR-DGGE (polymerase chain reaction-denaturing gradient gel electrophoresis) profiles for the eubacterial and archaebacterial communities from thermophilic sludge alternately exposed to mesophilic condition (TSEM) and mesophilic sludge alternately exposed to thermophilic condition (MSET) had a few populations in common, these are probably thermophilic microorganisms. The population profiles for archaebacterial communities of TSEM and MSET were quite different from each other. For TSEM under thermophilic condition, the specific methanogenic activity (SMA) was 159.6mL CH₄/g YSS/d, which was higher than 106.3mL CH₄/g VSS/d under mesophilic condition. The SMA for MSET under both temperature conditions was as much as those of TSEM. The lag phase period for MSET in the batch culture was around 2 times longer than TSEM, but the lag periods for both sludges under thermophilic condition were shorter than those under mesophilic condition. The acidogenic activity for both sludge types in MSET was slightly higher than TSEM under the thermophilic and mesophilic conditions. The specific hydrolytic activity for the two sludge types was higher under the mesophilic condition, and the hydrolysis potential of TSEM incubated under mesophilic condition was higher than other cases.