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Retroperitoneal Extraskeletal Osteosarcoma Misconstrued as a Primary Renal Tumor

Byung Hyun Soh, Woong Kyu Han, Seung Hwan Lee, Jieun Kwon, Woo Ick Yang, Seung Choul Yang
2006 Korean Journal of Urology  
Extraskeletal osteosarcoma is a rare malignant tumor of the soft tissue. In addition, there are only several reported cases of osteosarcoma of the retroperitoneum as a primary site. We report here on a case of extraskeletal osteosarcoma arising in the retroperitoneum. An 80-year-old man visited our hospital because of a known renal mass. Abdominal computed tomography showed a 10cm sized huge renal mass. We then performed radical nephrectomy. The mass revealed a solid and ivory-colored cut
more » ... e with multifocally ovoid cystic spaces and hemorrhage. Microscopically, the tumor consisted of polygonal stromal cells, giant cells and varying amounts of neoplastic new bone; mitotic figures were frequently observed. There was no distant metastasis or regional lymph node involvement. ꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏꠏ Key Word: Osteosarcoma
doi:10.4111/kju.2006.47.10.1124 fatcat:npehqm4s6ba7jl5p2ucnjwuzwe

Septic Peripheral Embolism in Left Leg fromAggregatibacter aphrophilusEndocarditis

Ja Young Lee, Si Hyun Kim, Haeng Soon Jeong, Seung Hwan Oh, Hye Ran Kim, Young Il Yang, Yang Haeng Lee, Jeong Nyeo Lee, Jeong Hwan Shin
2009 Korean Journal of Clinical Microbiology  
Aggregatibacter aphrophilus is a facultatively anaerobic gram-negative coccobacillus or bacillus that grows with no dependence on X factor and variable requirement for V factor. The organism is normal flora in the human oral cavity and upper respiratory tract and, rarely, causes invasive infections such as bacteremia, endocarditis, brain abscess, or osteomyelitis. We report a case of septic peripheral embolism in left leg from A. aphrophilus endocarditis. A 49-year-old man with known
more » ... n presented with acute muscle pain in the left leg. On physical examination, a regular heartbeat with a pansystolic murmur was heard. There were decreased pulses in the left popliteal and dorsalis pedis arteries and coldness of the left foot, although sensory and motor functions were intact. Angiography revealed an em-bolus in a branch of the left femoral artery. He underwent emergency embolectomy, and gram-negative bacilli grew in the embolus cultures. The same microorganism was isolated in two pairs of blood culturs and subsequently identified as A. aphrophilus. Transthoracic echocardiography revealed mitral regurgitation and multiple vegetations on the mitral valve. The patient was treated with a third-generation cephalosporin for 4 weeks and mitral valve replacement in view of the diagnosis of infective endocarditis and septic peripheral embolism. (Korean J Clin Microbiol 2009;12:82-86)
doi:10.5145/kjcm.2009.12.2.82 fatcat:s3sxhxyydrgsxgkktvmlxgqzsm

The Use of T1 Sagittal Angle in Predicting Cervical Disc Degeneration

Bong-Seok Yang, Su-Keon Lee, Kyung-Sub Song, Sang-Pil Yoon, Geun Jang, Chae-Chul Lee, Seong-Hwan Moon, Hwan-Mo Lee, Seung-Hwan Lee
2015 Asian Spine Journal  
Study Design: Retrospective evaluation. Purpose: To analyze the effect of T1 slope on degree of degeneration in patients with cervical disc degeneration. Overview of Literature: The T1 slope is well known parameter that may be very useful in evaluating sagittal balance. There are no reports on the analysis of the relationship between T1 slope and cervical disc degeneration. We hypothesized that T1 slope has an effect on the degree of cervical degeneration. Methods: Sixty patients who had
more » ... l spine magnetic resonance imaging (MRI) in our orthopedic clinic were enrolled. Patients were divided into two groups according to T1 slope. Radiologic parameters obtained from radiography and cervical spine MRI were compared between low T1 slope group (≤25) and high T1 slope group (>25). Results: Among low T1 slope group, average degeneration grade of each cervical segment was 2.65 in C2-3, 2.50 in C3-4, 2.62 in C4-5, 3.23 in C5-6, and 2.81 in C6-7. And that of high T1 group was 2.35 in C2-3, 2.32 in C3-4, 2.59 in C4-5, 2.79 in C5-6, and 2.32 in C6-7. Grade of degeneration of low T1 group was significantly higher, as compared with high T1 group in C5-6 (p=0.028) and C6-7 (p=0.009). Percentage of high grade degeneration of more than grand III was 65.4% in low T1 group and 32.4% in high T1 group (p=0.018). Risk of high grade degeneration of C6-7 was significantly higher in low T1 group (odds ratio, 5.63; 95% confidence interval, 1.665-19.057; p=0.005). Conclusions: Patients with low T1 slope had higher grade of degeneration regardless of age and gender. Low T1 slope is a potential risk factor of cervical spondylosis especially in the C6-7 cervical segment. Clinical Study Asian Spine J 2015;9(5):757-761 • http://dx.
doi:10.4184/asj.2015.9.5.757 pmid:26435795 pmcid:PMC4591448 fatcat:hwpmfjrwy5cptcw4w6ky474ame

The Definition of Metabolically Healthy Obesity

Hae Kyung Yang, Seung-Hwan Lee
2014 Journal of Korean Diabetes  
Metabolically healthy obesity (MHO) is a term indicating a subgroup of obese individuals who demonstrate normal to high levels of insulin sensitivity, a lower level of visceral adiposity and more favorable cardiovascular risk profiles. Although identifying MHO might have clinical significance in terms of management strategies, there is no consensus regardingthe criteria used for defining this subgroup. Several different definitions have been used for MHO, and this has resulted in a wide range
more » ... prevalence and low agreement between classifications. The analyses of clinical characteristics and the metabolic outcomes also showed controversial findings because of the different definitions used. Developing a standardized criteria that is easily applicable and that accurately accounts for risk factors for predicting the development of type 2 diabetes or cardiovascular outcomes is of clinical value and will broaden our understanding regarding the clinical importance of MHO. (J Korean Diabetes 2014;15:17-20) Abstract 가톨릭대학교 의과대학 서울성모병원 내분비내과 양혜경, 이승환 Focused Issue -Metabolically Healthy Obesity http://dx.
doi:10.4093/jkd.2014.15.1.17 fatcat:rbbyufz42va63bsyxp47svrhwe

Upper torso and pelvis linear velocity during the downswing of elite golfers

Seung-Hui Beak, Ahnryul Choi, Seung-Wook Choi, Seung Eel Oh, Joung Hwan Mun, Heegoo Yang, Taeyong Sim, Hae-Ryong Song
2013 BioMedical Engineering OnLine  
During a golf swing, analysis of the movement in upper torso and pelvis is a key step to determine a motion control strategy for accurate and consistent shots. However, a majority of previous studies that have evaluated this movement limited their analysis only to the rotational movement of segments, and translational motions were not examined. Therefore, in this study, correlations between translational motions in the 3 axes, which occur between the upper torso and pelvis, were also examined.
more » ... ethods: The experiments were carried out with 14 male pro-golfers (age: 29 ± 8 years, career: 8.2 ± 4.8years) who registered in the Korea Professional Golf Association (KPGA). Six infrared cameras (VICON; Oxford Metrics, Oxford, UK) and SB-Clinc software (SWINGBANK Ltd, Korea) were used to collect optical marker trajectories. The center of mass (CoM) of each segment was calculated based on kinematic principal. In addition, peak value of CoM velocity and the time that each peak occurred in each segment during downswing was calculated. Also, using crosscorrelation analysis, the degree of coupling and time lags of peak values occurred between and within segments (pelvis and upper torso) were investigated. Results: As a result, a high coupling strength between upper torso and pelvis with an average correlation coefficient = 0.86 was observed, and the coupling between segments was higher than that within segments (correlation coefficient = 0.81 and 0.77, respectively). Conclusions: Such a high coupling at the upper torso and pelvis can be used to reduce the degree of motion control in the central nervous system and maintain consistent patterns in the movement. The result of this study provides important information for the development of optimal golf swing movement control strategies in the future.
doi:10.1186/1475-925x-12-13 pmid:23398693 pmcid:PMC3599250 fatcat:zrf25eedgvawtdjk3iihkhr7lu

The Effect of the Addition of Carbohydrate on the Concentration of Odorous Compounds in Pig Slurry
양돈 슬러리에 첨가된 발효탄수화물의 종류별 악취물질 농도 비교

Ok Hwa Hwang, Seung Hak Yang, Jung Hwan Jeon, Jeong Hoon Kwag, Dong Yun Choi, Seung Bong Yang, Doo Hwan Kim, Sung Back Cho
2013 Journal of Animal Environmental Science  
Slurry treatments included peanut shell, palm golden fiber, almond hull, which was added 2% of the amount of slurry, and non-treatment control (n=4 each group). Levels of odorous compounds were measured from the liquid slurry incubated in 20℃ for 2 wk in chamber whose structure is similar to slurry pit. Concentration of phenols and indoles was higher (p<0.05) in control (48.4, 4.0 ppm) compared to almond hull (31.5, 1.4 ppm) or palm golden fiber (29.1, 1.6 ppm) group. Short chain fatty acid
more » ... A) level was lowest (p<0.05) in control (2,121 ppm) but highest in peanut shell group (3,640 ppm). Branched chain fatty acid (BCFA) concentration was highest (p<0.05) in peanut shell (296 ppm), but lowest in almond hull (90 ppm). Taken together, concentration of odorous compounds was decreased by addition of almond hull in pig slurry by which crude fiber and non-digestible fiber (NDF) may act as a carbon source. (
doi:10.11109/jaes.2013.19.1.001 fatcat:h6c4gf3iirbnppgtnrwsee2fnu

A Newly Recorded Plant of South Korea: Eragrostis aquatica Honda (Poaceae)

Su-Young Jung, Soo-Hyun Park, Jin Jang, Jong-Cheol Yang, Seung-Hwan Oh, Kae-Sun Chang, Yang-Hoon Cho, Jong-Hwan Kim
2014 Journal of Asia-Pacific Biodiversity  
A newly reported species of Poaceae, Eragrostis aquatica, is reported from South Korea, which was collected from Naejang and Sucheong reservoir, Jeongeup-si, Jeollabuk-do. E. aquatica is known to be an endemic plant in Japan, but its distribution in South Korea was confirmed in the present study. It can be distinguished from Eragrostis pilosa and Eragrostis multicaulis by its habit and morphological characteristics, with perennial and spikelets 1.5e2.0 mm wide.
doi:10.1016/j.japb.2014.03.001 fatcat:iybeflc35za2vnoebs6rjchfsu

The Results of Proximal Femoral Nail for Intertrochanteric Fracture in Hemodialysis Patient

Kyung Sub Song, Sang Phil Yoon, Su Keon Lee, Seung Hwan Lee, Bong Seok Yang, Byeong Mun Park, Ick Hwan Yang, Beom Seok Lee, Ji Ung Yeom
2017 Hip & Pelvis  
Hip fractures in hemodialysis patients are accompanied by high rates of complications and morbidities. Previous studies have mainly reported on nonunion and avascular necrosis of femoral neck fractures in this patient group. In this study the complication and clinical results of hemodialysis patients with intertrochanteric fractures treated with proximal femoral intramedullary nailing have been investigated through comparison with patients with normal kidney function. Forty-seven patients were
more » ... ncluded; the hemodialysis group (n=17) and the control group with normal kidney function (n=30). The medical history and clinical findings including preoperative and postoperative blood examinations, radiological examinations and ambulatory status (measured using the Koval score). The rate of complications and morbidities were also investigated and compared. Preoperative hemoglobin/hematocrit was lower but a significant increase in partial thromboplastin time was observed in the hemodialysis group. The amount of bleeding/transfusions were higher and operative time was longer in the hemodialysis group. Upon radiologic examination, there was no significant difference in rate of unstable fracture and nonunion between the two groups. However the postoperative Koval score was significantly worse and the odds ratio of inability to walk after surgery was 13.5 times higher in the hemodialysis group. There was no significant difference in radiological results, but the risk of inability to walk after surgery was 13.5 times higher in the hemodialysis group. Hemodialysis patients have more morbidities and are hemodynamically unstable therefore require special attention. Accurate reduction and firm fixation is required and attentive postoperative rehabilitation is needed.
doi:10.5371/hp.2017.29.1.54 pmid:28316963 pmcid:PMC5352726 fatcat:46uhrdrds5hv3fuqhervuvbhn4

Diversity of Calpain-Calpastatin gene frequencies in Brown, Brindle and Jeju Black Hanwoo
한우, 칡소 및 제주 흑우 Calpain-Calpastatin 유전자 다양성

Seung-Hwan Lee, Seung-Chang Kim, Soo-Hyun Cho, Bong-Hwan Choi, A. Sharma, Dajeong Lim, Chang-Gwan Dang, Sun-Sik Chang, Jae-Hwan Kim, Moon Suk Ko, Boh-Suck Yang, Hee-Sul Kang
2013 Korean Journal of Agricultural Science  
The aim of study was to investigate genetic diversity for the calpain/calpastatin gene in three Hanwoo breeds [(Brown (n=62), Brindle (n=81) and Jeju Black (n=30)]. Random samples from three breeds of Hanwoo were selected and genotyped for the 7 SNPs of calpain/calpastatin using TaqMan method. Allele frequencies were investigated for CAPN1/CAST gene. Allele frequency of CAST2 SNP was 0.75, 0.59 and 0.22 for Brown, Brindle and Jeju black, respectively. The CAST3 revealed allele frequency of 0.59
more » ... and 0.57 in Brown and Jeju Black, while it showed very low allele frequency (0.07) in Brindle. In particular, favorable allele (G allele) for the CAPN1-2 SNP which was shown a strong association with tenderness in Taurine and Indicine cattle revealed 16% and 17% higher allele frequency in Brown Hanwoo (0.82) comparing Brindle (0.66) and Jeju Black Hanwoo (0.65). AMOVA demonstrated that among population variance occupied only 10% of total variance and among individual variance was 0%, while within individual variance was 90% of total variance. This result showed that population effect contributed very small portion of genetic to these three Hanwoo breeds, while within individual variance contributed large portion of genetic diversity within these Hanwoo breeds. In conclusion, three Hanwoo breeds (Brown, Brindle and Jeju black) showed a genetically homogeneous based on the 7 SNPs of CAPN1/CAST gene and it came from same ancestor to form modern Hanwoo breed.
doi:10.7744/cnujas.2013.40.2.147 fatcat:dzx3bk2eonbrvg44ca27qcppy4

Efficacy of Lactobacillus plantarum in prevention of inflammatory bowel disease

Bao Le, Seung Hwan Yang
2018 Toxicology Reports  
Yang Toxicology Reports 5 (2018) 314-317 Table 2 2 Results of Lactobacillus plantarum in vivo studies. Bacterial strains Mice strains Daily dose Duration Effects  ... 
doi:10.1016/j.toxrep.2018.02.007 pmid:29854599 pmcid:PMC5977373 fatcat:gifchcrwkbfcpkqtdvupujnhne

True Neurogenic Thoracic Outlet Syndrome Following Hyperabduction during Sleep - A Case Report -

Ji Hoon Lee, Hyun Soo Choi, Seung Nam Yang, Won Min Cho, Seung Hwa Lee, Hwan-Hoon Chung, Jae Seung Shin, Dong Hwee Kim
2011 Annals of Rehabilitation Medicine  
True neurogenic thoracic outlet syndrome (TOS) is an uncommon disease and is diffi cult to diagnose at the early stage and then completely cure. We experienced a case of true neurogenic TOS with typical clinical symptoms and electrophysiologic findings as a result of repetitive habitual sleep posture. A 31-year-old woman who had complained of progressive tingling sensation on the 4th and 5th fingers with shoulder pain was diagnosed of brachial plexopathy at the lower trunk level by
more » ... stic studies. There was no other cause of brachial plexopathy except her habit of hyperabduction of shoulder during sleep. Th is case demonstrated that the habitual abnormal posture can be the only major cause of neurogenic TOS. It is of importance to consider TOS with the habitual cause because simple correction of the posture could stabilize or even reverse disease progress.
doi:10.5535/arm.2011.35.4.565 pmid:22506174 pmcid:PMC3309244 fatcat:jygm2pjhsnbjfmqgctbxbhpomi

A Case of Nivolumab-Induced Lichen Planus

Se Jin Oh, Young Hwan Choi, Hyun Jeong Byun, Seung Hwan Oh, Ji-Hye Park, Jong Hee Lee, Dong-Youn Lee, Joo-Heung Lee, Jun-Mo Yang
2019 Annals of Dermatology  
Jun-Mo Yang, https://orcid.org/0000-0003-0656-8046 ORCID  ...  Management of idiopathic LP is challenging, but Anti-PD-1 therapy-induced Alitretinoin Treatment for Gefitinib-Induced Paronychia Jin Oh, Young Hwan Choi, Hyun Jeong Byun, Seung Hwan Oh, Ji-Hye Park  ...  , Jong Hee Lee, Dong-Youn Lee, Joo-Heung Lee, Jun-Mo Yang Department of Dermatology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea Fig. 1 . 1 (A) Violaceous or dusky  ... 
doi:10.5021/ad.2019.31.3.345 pmid:33911605 pmcid:PMC7992723 fatcat:akwzwarv2nfnrp5idfplszkyey

Digital Zoom Based on HCI Color Model (Hue-Chroma-Intensity)

Seung Hwan Lee, Dong Hwan Koh, Yang Wang, Hoon Kang
2013 2013 4th International Conference on Intelligent Systems, Modelling and Simulation  
In this paper, we introduce and propose a new color representation scheme, the HCI color model, and a digital zoom method based on this model. The HCI color model consists of three channels; hue, chroma, and intensity. Since this color model is modified from the cylindrical form, not only the problem of saturation dependence on the brightness but also that of fully saturated achromatic color could be avoided. To prove the usefulness and the validity of the HCI color model, several experiments
more » ... d analysis of the results are presented and demonstrated. Moreover, we applied this model to a digital-zoom interpolation algorithm, and typical mosaic phenomena are reduced by adopting the flood-fill mean shift and B-spline snake algorithm.
doi:10.1109/isms.2013.110 fatcat:6yadlirlyjht7iqprr5vbriium

HbA1c Variability and Micro- and Macrovascular Complications of Diabetes

Hae Kyung Yang, Seung-Hwan Lee
2014 Journal of Korean Diabetes  
doi:10.4093/jkd.2014.15.4.202 fatcat:fy6pajgfj5fs3dazq24aunbari

Down syndrome with asymptomatic neuroglial cyst: A case report and review of the literature

Seung Do Yang, Seung Ju Lee, Dong Hwan Lee, Yong Hee Hong
2017 Journal of Genetic Medicine  
doi:10.5734/jgm.2017.14.2.67 fatcat:vknqavgagvaqvjgdgykbqnrx6q
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