1.The case reports of laparoscopic assisted right hemicolectomy.
Bong Hwa LEE ; Hyo GONG ; Kyoung Sub YOON ; Ze Hong WOO
Journal of the Korean Surgical Society 1993;44(6):916-922
No abstract available.
2.Radiologic Findings of Multiple Myeloma with Gastric Involvement: A Case Report.
Hyo Sung KWAK ; Gong Yong JIN ; Jeong Min LEE
Korean Journal of Radiology 2002;3(2):133-135
We report a case of multiple myeloma with gastric involvement occurring in a patient who underwent an upper gastrointestinal series (UGIS), CT and MRI. UGIS depicted a luminal protruding mass, while contrast-enhanced CT demonstrated marked thickening of the gastric wall, with subtle contrast enhancement. At T1- and T2-weighted MR imaging, the mass showed iso- and intermediate signal intensity, respectively. After the administration of contrast material, subtle homogeneous enhancement was apparent.
Case Report
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Contrast Media/administration & dosage
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Human
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Magnetic Resonance Imaging
;
Male
;
Middle Age
;
Multiple Myeloma/pathology/*radiography
;
Stomach Neoplasms/pathology/*radiography
;
Tomography, X-Ray Computed
3.Treatment of Splenic Artery Aneurysm with Double Overlapping Bare Stents: Case Report.
Hyo Sung KWAK ; Young Min HAN ; Gong Yong JIN
Journal of the Korean Radiological Society 2004;51(3):291-294
The traditional treatment of splenic artery aneurysm (SAA) is generally surgery and/or transcatheter arterial embolization, but recently, the treatment of SAA using a stent graft has been reported. However, the acute angle of the celiac axis, as well as the tortuous path of the splenic artery makes the use of stent graft difficult for treatment of aneurysms. We report here a case of SAA treated with the technique of double overlapping metallic stents.
Aneurysm*
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Axis, Cervical Vertebra
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Blood Vessel Prosthesis
;
Splenic Artery*
;
Stents*
4.Aneurysm Formation of Cervical Aortic Arch Combined with Subaortic Left Innominate Vein: Case Report .
Young Min HAN ; Ja Hong GU ; Gong Yong JIN ; Hyo Sung KWAK ; Gyung Ho CHUNG ; Myoung Ja CHUNG
Journal of the Korean Radiological Society 2004;50(1):27-32
An asymptomatic 26-year-old man was initially admitted with a suspicious mediastinal mass. On the basis of the contrast-enhanced chest CT findings, aneurysm formation involving the left cervical aortic arch associated with subaortic left innominate vein was diagnosed. The aneurysm was confirmed by MR angiography and DSA. The arch aneurysm was surgically removed. We describe this case, and review the literature.
Adult
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Aneurysm*
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Angiography
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Aorta, Thoracic*
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Brachiocephalic Veins*
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Humans
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Tomography, X-Ray Computed
5.Cerebral Aneurysm Arising from the Azygous Anterior Cerebral Artery : Case Report.
Hyoung Gon KIM ; Hyo Joon KIM ; Tae Sik GONG ; Chang Young KWON
Korean Journal of Cerebrovascular Surgery 2008;10(3):532-534
The azygous anterior cerebral artery (ACA) is a rare type of ACA anomaly. In the conventional angiography, cognition of its realm is difficult without considerable reading. Clinically, misreading its nature causes confusion during the surgical approach to its associated cerebral aneurysm. We report this rare clinical experience with an angiographic and surgical review.
Aneurysm
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Angiography
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Anterior Cerebral Artery
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Cerebral Angiography
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Cognition
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Intracranial Aneurysm
6.Effectiveness of Low-Dose Erythromycin Therapy in Diffuse Panbronchiolitis: Assessment with Serial Changes on High-Resolution CT and Pulmonary Function Test.
Gong Yong JIN ; Young Min HAN ; Heung Bum LEE ; Hyo Sung KWAK ; Gyung Ho CHUNG
Journal of the Korean Radiological Society 2003;48(6):467-473
PURPOSE: To determine evaluate the clinical effectiveness of low-dose erythromycin (EM) therapy in patients with diffuse panbronchiolitis (DPB), and to correlate the pulmonary function testing (PFT) changes seen at serial high-resolution CT (HRCT) withthe results of post-treatment. MATERIALS AND METHODS: We retrospectively evaluated 13 DPB patients [seven men and six women aged 23-68 (mean, 46.2) years] who had undergone PFT, HRCT, and transbronchial or open lung biopsy prior to long-term, low-dose EM therapy (250 mg twice daily for more than six months). The interval between initial and follow-up study ranged from 7 to 32 (mean, 16.6+/-8.0) months, and we compared the changes in HRCT findings and PFT parameters before and after treatment. RESULTS: At HRCT after EM therapy, the extent of centrilobular nodules (p=0.006), peripheral bronchiolar wall thickening (p=0.02), and areas of low attenuation (p=0.011) decreased significantly, while FVC and FEV1 showed significant increases: FVC, from 2.47+/-0.83 to 2.74+/-0.95 (p=0.028); and FEV1, from 1.66+/-0.75 to 1.95+/-0.87 (p=0.02). As the extent of peripheral bronchiolar wall thickening (r=-0.609, p=0.047) and areas of low attenuation (r=-0.687, p=0.041) decreased at serial HRCT, FVC and FEV1 increased significantly. CONCLUSION: Long-term follow-up HRCT findings showed that for DPB patients, lowdose EM provides effective treatment. In addition, HRCT appears to be valuable for the objective evaluation of responses to EM therapy.
Biopsy
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Bronchiolitis
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Erythromycin*
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Female
;
Follow-Up Studies
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Humans
;
Lung
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Male
;
Respiratory Function Tests*
;
Retrospective Studies
7.Comparison of Renal Damage by Iodinated Contrast or Gadolinium in an Acute Renal Failure Rat Model Based on Serum Creatinine Levels and Apoptosis Degree.
Hyo Sung KWAK ; Young Hwan LEE ; Young Min HAN ; Gong Yong JIN ; Won KIM ; Gyung Ho CHUNG
Journal of Korean Medical Science 2005;20(5):841-847
This study was undertaken to compare renal damage, as determined by serum creatinine and degree of apoptosis, caused by iodinated contrast or gadolinium in an acute renal failure (ARF) rat model. Rats were divided into three groups; controls (n=3), a CT contrast medium group (n=9), and an MR contrast medium group (n=9). The CT and MR groups were further subdivided into three groups, namely, low, standard, and high dose subgroups. Renal function was evaluated by determining serum creatinine levels; before ARF, and 48 hr after ARF and contrast administration. Apoptosis was assayed by terminal deoxynucleotidyl transferasemediated dUTP nick-end labeling (TUNEL). No significant creatinine level differences were observed between the CT and MR groups (p=0.116). Degrees of apoptosis in the renal cortex and medulla were more severe in the CT contrast medium group than in the control or MR contrast medium group (p<0.05). The study shows that CT contrast medium did not aggravate renal function more so than MR contrast medium in this ARF rat model. However, apoptosis examination in the renal cortex and medulla indicated that CT contrast medium induced more severe apoptosis than MR contrast medium (p<0.05). We conclude that CT contrast medium can be used for renal imaging studies when subjects are well hydrated and preventive medication is administered.
Animals
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Apoptosis/*drug effects
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Contrast Media/adverse effects
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Creatine/*blood
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Female
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Gadolinium DTPA/*adverse effects
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Iohexol/adverse effects/*analogs and derivatives
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Kidney/*drug effects/*pathology
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Kidney Failure, Acute/*blood/pathology/radiography
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Male
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Rats
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Rats, Sprague-Dawley
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Research Support, Non-U.S. Gov't
8.Analysis of Radiologic Findings to Predict the Histology of the Small Renal Tumors: A Retrospective Study.
Taehyo KIM ; Hyo Kyeong CHOI ; Kyung Sik CHO ; Gyungyub GONG ; Choung Soo KIM ; Hanjong AHN
Korean Journal of Urology 1999;40(4):409-415
PURPOSE: Recently, incidental small renal tumors detected by computerized tomography(CT) or ultrasonography(US) have been increasing. Differentiation between the small renal cell carcinoma and benign tumorous lesions is often difficult. To reduce the unnecessary surgical interventions for these small renal tumors, we anayzed the radiologic findings of surgically removed small renal tumors(less than 3cm in diameter) and evaluated whether radiologic studies would predict their histologic findings. MATERIALS AND METHODS: Radiologic findings of 28 renal cell carcinomas(RCC), 7 angiomyolipomas(AML), 4 cysts including 2 multilocular cysts and 1 oncocytoma were analyzed, retrospectively. Density, contour, and heterogenity of the tumors on CT were evaluated, while echogenecity, posttumoral enhancement, peritumoral hypoechoic rim, and intratumoral cystic change on US were evaluated. RESULTS: Tiny fat density on CT was found in 4 of 7 AMLs and 1 of 28 RCCs. On US, 3 of 6 AMLs and 1 of 24 RCCs showed marked hyperechogenecity identical to the renal sinus fat. AMLs showed fat density in 4 of 7(57.1%) on CT and marked hyperechogenecity in 5 of 7(71.4%) on US, respectively. Two AMLs which showed hypoechogenecity and no fat density had less than 5% of fat on histologic examination while others had more than 30% of fat. All AMLs, oncocytoma and most RCCs(73%) showed exophytically out-bulging growth pattern while all benign cysts showed endophytic growth. Posttumoral sonic enhancement was found in 3 of 4 cysts and 1 of 24 RCCs. Peritumoral hypoechoic rim and intratumoral cystic changes were identified in 8 of 24(33%) and 7 of 24(29%) RCCs, respectively, while no such findings were detected in other tumors and cysts. CONCLUSIONS: Fat density on CT or marked hyperechogenecity identical to renal sinus fat on US strongly suggest angiomyolipoma, whereas endophytic growth pattern and posttumoral enhancement on US favor benign cyst. In the meantime, absence of above findings combined with peritumoral halo and/or intratumoral cystic change indicate renal cell carcinoma which should be explored.
Adenoma, Oxyphilic
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Angiomyolipoma
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Carcinoma, Renal Cell
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Retrospective Studies*
;
Ultrasonography
9.Analysis of Radiologic Findings to Predict the Histology of the Small Renal Tumors: A Retrospective Study.
Taehyo KIM ; Hyo Kyeong CHOI ; Kyung Sik CHO ; Gyungyub GONG ; Choung Soo KIM ; Hanjong AHN
Korean Journal of Urology 1999;40(4):409-415
PURPOSE: Recently, incidental small renal tumors detected by computerized tomography(CT) or ultrasonography(US) have been increasing. Differentiation between the small renal cell carcinoma and benign tumorous lesions is often difficult. To reduce the unnecessary surgical interventions for these small renal tumors, we anayzed the radiologic findings of surgically removed small renal tumors(less than 3cm in diameter) and evaluated whether radiologic studies would predict their histologic findings. MATERIALS AND METHODS: Radiologic findings of 28 renal cell carcinomas(RCC), 7 angiomyolipomas(AML), 4 cysts including 2 multilocular cysts and 1 oncocytoma were analyzed, retrospectively. Density, contour, and heterogenity of the tumors on CT were evaluated, while echogenecity, posttumoral enhancement, peritumoral hypoechoic rim, and intratumoral cystic change on US were evaluated. RESULTS: Tiny fat density on CT was found in 4 of 7 AMLs and 1 of 28 RCCs. On US, 3 of 6 AMLs and 1 of 24 RCCs showed marked hyperechogenecity identical to the renal sinus fat. AMLs showed fat density in 4 of 7(57.1%) on CT and marked hyperechogenecity in 5 of 7(71.4%) on US, respectively. Two AMLs which showed hypoechogenecity and no fat density had less than 5% of fat on histologic examination while others had more than 30% of fat. All AMLs, oncocytoma and most RCCs(73%) showed exophytically out-bulging growth pattern while all benign cysts showed endophytic growth. Posttumoral sonic enhancement was found in 3 of 4 cysts and 1 of 24 RCCs. Peritumoral hypoechoic rim and intratumoral cystic changes were identified in 8 of 24(33%) and 7 of 24(29%) RCCs, respectively, while no such findings were detected in other tumors and cysts. CONCLUSIONS: Fat density on CT or marked hyperechogenecity identical to renal sinus fat on US strongly suggest angiomyolipoma, whereas endophytic growth pattern and posttumoral enhancement on US favor benign cyst. In the meantime, absence of above findings combined with peritumoral halo and/or intratumoral cystic change indicate renal cell carcinoma which should be explored.
Adenoma, Oxyphilic
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Angiomyolipoma
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Carcinoma, Renal Cell
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Retrospective Studies*
;
Ultrasonography
10.Treatment of Malignant Biliary Obstruction with a PTFE-Covered Self-Expandable Nitinol Stent.
Young Min HAN ; Hyo Sung KWAK ; Gong Yong JIN ; Seung Ok LEE ; Gyung Ho CHUNG
Korean Journal of Radiology 2007;8(5):410-417
OBJECTIVE: We wanted to determine the technical and clinical efficacy of using a PTFE-covered self-expandable nitinol stent for the palliative treatment of malignant biliary obstruction. MATERIALS AND METHODS: Thirty-seven patients with common bile duct strictures caused by malignant disease were treated by placing a total of 37 nitinol PTFE stents. These stents were covered with PTFE with the exception of the last 5 mm at each end; the stent had an unconstrained diameter of 10 mm and a total length of 50-80 mm. The patient survival rate and stent patency rate were calculated by performing Kaplan-Meier survival analysis. The bilirubin, serum amylase and lipase levels before and after stent placement were measured and then compared using a Wilcoxon signed-rank test. The average follow-up duration was 27.9 weeks (range: 2-81 weeks). RESULTS: Placement was successful in all cases. Seventy-six percent of the patients (28/37) experienced adequate palliative drainage for the remainder of their lives. There were no immediate complications. Three patients demonstrated stent sludge occlusion that required PTBD (percutaneous transhepatic biliary drainage) irrigation. Two patients experienced delayed stent migration with stone formation at 7 and 27 weeks of follow-up, respectively. Stent insertion resulted in acute elevations of the amylase and lipase levels one day after stent insertion in 11 patients in spite of performing endoscopic sphincterotomy (4/6). The bilirubin levels were significantly reduced one week after stent insertion (p < 0.01). The 30-day mortality rate was 8% (3/37), and the survival rates were 49% and 27% at 20 and 50 weeks, respectively. The primary stent patency rates were 85%, and 78% at 20 and 50 weeks, respectively. CONCLUSION: The PTFE-covered self-expandable nitinol stent is safe to use with acceptable complication rates. This study is similar to the previous studies with regard to comparing the patency rates and survival rates.
Adenocarcinoma/*complications
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Aged
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Aged, 80 and over
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Alloys/adverse effects/*therapeutic use
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Cholestasis, Extrahepatic/etiology/*surgery
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Coated Materials, Biocompatible/*therapeutic use
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Common Bile Duct/radiography/surgery
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Digestive System Neoplasms/*complications
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Equipment Design
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Female
;
Follow-Up Studies
;
Humans
;
Male
;
Middle Aged
;
Palliative Care/methods
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Pilot Projects
;
Polytetrafluoroethylene/adverse effects/*therapeutic use
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Postoperative Complications/diagnosis/epidemiology
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Prospective Studies
;
*Stents/adverse effects
;
Survival Analysis
;
Treatment Outcome