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1.
Article in English | WPRIM | ID: wpr-889761

ABSTRACT

Purpose@#We aimed to develop a novel method for orthotopic colon cancer model, using tissue adhesive in place of conventional surgical method. @*Materials and Methods@#RFP HCT 116 cell line were used to establish the colon cancer model. Fresh tumor tissue harvested from a subcutaneous injection was grafted into twenty nude mice, divided into group A (suture method) and group B (tissue adhesive method). For the group A, we fixed the tissue on the serosa layer of proximal colon by 8-0 surgical suture. For the group B, tissue adhesive (10 μL) was used to fix the tumor. The mortality, tumor implantation success, tumor metastasis, primary tumor size, and operation time were compared between the two groups. Dissected tumor tissue was analyzed for the histology and immunohistochemistry. Also, we performed tumor marker analysis. @*Results@#We observed 30% increase in graft success and 20% decrease in mortality, by using tissue adhesive method, respectively. The median colon tumor size was significantly increased by 4 mm and operation time was shortened by 6.5 minutes. The H&E showed similar tumor structure between the two groups. The immunohistochemistry staining for cancer antigen 19-9, carcinoembryonic antigen, cytokeratin 20, and Ki-67 showed comparable intensities in both groups. Real-time quantitative reverse transcription analysis showed eight out of nine tumor markers are unchanged in the tissue adhesive group. Western blot indicated the tissue adhesive group expressed less p-JNK (apototic marker) and more p-MEK/p-p38 (proliferation marker) levels. @*Conclusion@#We concluded the tissue adhesive method is a quick and safe way to generate orthotopic, colon cancer model.

2.
Article in English | WPRIM | ID: wpr-897465

ABSTRACT

Purpose@#We aimed to develop a novel method for orthotopic colon cancer model, using tissue adhesive in place of conventional surgical method. @*Materials and Methods@#RFP HCT 116 cell line were used to establish the colon cancer model. Fresh tumor tissue harvested from a subcutaneous injection was grafted into twenty nude mice, divided into group A (suture method) and group B (tissue adhesive method). For the group A, we fixed the tissue on the serosa layer of proximal colon by 8-0 surgical suture. For the group B, tissue adhesive (10 μL) was used to fix the tumor. The mortality, tumor implantation success, tumor metastasis, primary tumor size, and operation time were compared between the two groups. Dissected tumor tissue was analyzed for the histology and immunohistochemistry. Also, we performed tumor marker analysis. @*Results@#We observed 30% increase in graft success and 20% decrease in mortality, by using tissue adhesive method, respectively. The median colon tumor size was significantly increased by 4 mm and operation time was shortened by 6.5 minutes. The H&E showed similar tumor structure between the two groups. The immunohistochemistry staining for cancer antigen 19-9, carcinoembryonic antigen, cytokeratin 20, and Ki-67 showed comparable intensities in both groups. Real-time quantitative reverse transcription analysis showed eight out of nine tumor markers are unchanged in the tissue adhesive group. Western blot indicated the tissue adhesive group expressed less p-JNK (apototic marker) and more p-MEK/p-p38 (proliferation marker) levels. @*Conclusion@#We concluded the tissue adhesive method is a quick and safe way to generate orthotopic, colon cancer model.

3.
Article in English | WPRIM | ID: wpr-224180

ABSTRACT

Esophageal stents have been used to palliate patients with dysphagia caused by esophageal cancer. Early rigid plastic prostheses have been associated with a high risk of complications. However, with the development of self-expanding stents, it has developed into a widely accepted method for treating malignant esophageal strictures and esophagorespiratory fistulas (ERFs). The present review covers various aspects of self-expanding metallic stent placement for palliating esophageal cancer, including its types, placement procedures, indications, contraindications, complications, and some of innovations that will become available in the future.


Subject(s)
Humans , Constriction, Pathologic , Deglutition Disorders , Esophageal Neoplasms , Esophageal Stenosis , Fistula , Methods , Plastics , Prostheses and Implants , Stents
4.
Article in English | WPRIM | ID: wpr-110924

ABSTRACT

Tetralogy of Fallot (TOF) is the most common cyanotic congenital heart disease. Only a few patients reach adulthood without surgical correction. Unrepaired TOF patients with mild to moderate right ventricular outflow tract (RVOT) obstruction may be clinically silent until adulthood. TOF with hypoxic spells present as periods of profound cyanosis that occur because of almost total RVOT obstruction. So, hypoxic spell typically occurs in a crying infant but is rare in an adult. In this report, we presented a case of a 75-year-old patient with uncorrected TOF presenting with hypoxic spell, consequent pulmonary hypertension and chronic heart failure. This is the oldest case of natural survivor with uncorrected TOF in Korea and the oldest patient presenting hypoxic spell worldwide.


Subject(s)
Adult , Aged , Humans , Infant , Hypoxia , Crying , Cyanosis , Heart Defects, Congenital , Heart Failure , Hypertension, Pulmonary , Korea , Survivors , Tetralogy of Fallot
6.
Article in English | WPRIM | ID: wpr-153385

ABSTRACT

Gastric cancer is one of the most common malignancies and most frequent causes of cancer-related death worldwide. Radical surgical resection accomplished by total or distal gastrectomy represents the mainstay of curative treatment for gastric cancer; however, recurrent cancer still occurs in a significant amount of cases. Patients with recurrent cancer are generally incurable and often experience debilitating symptoms, such as nausea, vomiting, dysphagia, dehydration, and malnutrition, because of malignant gastric-outlet, duodenal, and jejunal obstructions. Consequently, such patients experience progressive deterioration of quality of life. If bypass surgery has not already been performed, it is not usually appropriated in the context of recurrent cancer and is associated with a high risk of morbidity and mortality. Endoscopic or fluoroscopic self-expandable metal stent placement represents an effective and safe method for palliative treatment of recurrent cancer in patients with the surgically-altered stomach. Therefore, it should be considered as the first-line option. Importantly, accurate knowledge of the surgically-altered anatomy and stricture location are critical to achieve successful treatment outcomes.


Subject(s)
Humans , Constriction, Pathologic , Deglutition Disorders , Dehydration , Gastrectomy , Gastric Outlet Obstruction , Malnutrition , Methods , Mortality , Nausea , Palliative Care , Quality of Life , Self Expandable Metallic Stents , Stents , Stomach Neoplasms , Stomach , Vomiting
7.
Article in English | WPRIM | ID: wpr-18854

ABSTRACT

BACKGROUND: To determine the technical feasibility and success rate of percutaneous radiologic gastrostomy (PRG) after failure of percutaneous endoscopic gastrostomy (PEG). METHODS: Consecutive patients referred for PRG after failure of PEG between May 2011 and June 2016 were included in this study. The reasons for the failure of PEG, as well as the technical success and complications of PRG were noted. RESULTS: Fifteen patients (14 men, 1 woman; age, 27-93 years) were included. The most common reasons for PEG failure were esophageal stricture due to malignancies (n = 8), unfavorable abdominal wall conditions (n = 3), unstable patient condition during endoscopy (n = 2), and other miscellaneous conditions (n = 2). PRG placement was technically successful in all 15 cases. In one case, early slip-out of the gastrostomy tube occurred, which required removal and repositioning. No mortality was noted. CONCLUSION: PRG is technically feasible in patients with failed PEG insertion, and has advantages over PEG and a high overall success rate.


Subject(s)
Female , Humans , Male , Abdominal Wall , Endoscopy , Esophageal Stenosis , Gastrostomy , Mortality
8.
Article in Korean | WPRIM | ID: wpr-8142

ABSTRACT

BACKGROUND/AIMS: Lymphofollicular gastritis (LFG) is defined as antral gastritis with endoscopic findings characterized by a miliary pattern resembling “goose flesh”. We aimed to analyze the clinical features of LFG and the utility of Helicobacter pylori eradication therapy in LFG. MATERIALS AND METHODS: Patients with LFG, regardless of upper gastrointestinal symptoms (7 men, 28 women; age range, 21~67 years), were examined for H. pylori using the CLO test during endoscopy. One specimen was obtained from the greater curvatures of the lower body and the antrum. Clinical features were compared according to H. pylori-positive status. RESULTS: Among 35 patients with LFG, 31 (88.6%) were infected with H. pylori. LFG predominantly affected young women (28/35, 80.0%; mean age, 43.73 years). One case of gastric cancer with H. pylori-positive LFG was found. H. pylori eradication rate in LFG patients was low (3/12, 25.0%). CONCLUSIONS: LFG is closely associated with H. pylori infection and predominantly affects women and young adults. Future studies are needed to determine whether H. pylori eradication reduces the risk of gastric cancer.


Subject(s)
Female , Humans , Male , Young Adult , Endoscopy , Gastritis , Helicobacter pylori , Helicobacter , Stomach Neoplasms
9.
Article in English | WPRIM | ID: wpr-167197

ABSTRACT

In 1991, the author (H.Y.S.) reported the first case of self-expandable metallic stent (SEMS) placement in a patient with recurrent cancer after gastrojejunostomy. Since then SEMS placement has developed into a well-established method for the palliative treatment of malignant gastroduodenal obstruction. This year marks the 30th year the author has been implicated in the development of gastrointestinal SEMSs. Thus far, the author has developed successively a total of six generations of gastroduodenal SEMSs through trial and error over the years. In the present article, the author reviews his personal experience in developing gastroduodenal stents.


Subject(s)
Humans , Family Characteristics , Gastric Bypass , Methods , Palliative Care , Stents
10.
Article in English | WPRIM | ID: wpr-167198

ABSTRACT

The insertion of self-expanding stents into malignant strictures of the small and large bowel has become a routine procedure around the world. However, stent development has happened very much on a "trial & error" approach, based mostly on bright ideas of enthusiastic individuals or marketing decisions by the manufacturer. A large variety of stents are commercially available, covered to a variable degree by a membrane to reduce tissue ingrowth. However, in vitro characteristics and in vivo behavior vary significantly between stents and few operators are aware of the differences. While the ideal stent still remains to be defined, it is important that interventionists understand the variations, in order to make the best possible choice for the individual patient. This article illustrates current principles of stent construction.


Subject(s)
Humans , Abdominal Neoplasms , Constriction, Pathologic , Endoscopy, Gastrointestinal , In Vitro Techniques , Marketing , Membranes , Palliative Medicine , Radiology, Interventional , Self Expandable Metallic Stents , Stents
11.
Korean j. radiol ; Korean j. radiol;: 488-493, 2014.
Article in English | WPRIM | ID: wpr-9201

ABSTRACT

OBJECTIVE: The purpose of our study was to assess the feasibility of performing percutaneous radiologic gastrostomy (PRG) in patients who had undergone partial gastrectomy and to evaluate factors associated with technical success. MATERIALS AND METHODS: Nineteen patients after partial gastrectomy, who were referred for PRG between April 2006 and April 2012, were retrospectively analyzed. The remnant stomach was punctured using a 21-gauge Chiba-needle. A single anchor was used for the gastropexy and a 12-Fr or 14-Fr gastrostomy tube was inserted. Data were collected regarding the technical success, procedure time, and presence of any complications. Univariable analyses were performed to determine the factors related to the technical success. RESULTS: Percutaneous radiologic gastrostomy was technically successful in 10 patients (53%), while a failed attempt and failure without an attempt were observed in 5 (26%) and 4 (21%) patients, respectively. Percutaneous radiologic jejunostomy was successfully performed in 9 patients who experienced technical failure. In the 10 successful PRG cases, the mean procedure time was 6.35 minutes. Major complications occurred in 2 patients, tube passage through the liver and pneumoperitonum in one and severe hemorrhage in the other. The technical success rate was higher in patients with Billroth I gastrectomy (100%, 6/6) than in patients with Billroth II gastrectomy (31%, 4/13) (p = 0.011). CONCLUSION: Percutaneous radiologic gastrostomy can be successfully performed using the one-anchor technique in approximately half of the patients after partial gastrectomy.


Subject(s)
Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Analysis of Variance , Feasibility Studies , Gastrectomy/methods , Gastric Stump , Gastrostomy/instrumentation , Jejunostomy/methods , Operative Time , Punctures/methods , Radiography, Interventional , Retrospective Studies , Suture Anchors , Treatment Outcome
12.
Korean Circulation Journal ; : 415-422, 2014.
Article in English | WPRIM | ID: wpr-149410

ABSTRACT

BACKGROUND AND OBJECTIVES: Ten to twenty percent of children with Kawasaki disease (KD) do not respond to initial intravenous immunoglobulin (IVIG) treatment. If untreated, approximately 15% to 25% of KD patients have complications. The aim of this study was to find useful predictors of responsiveness to initial IVIG treatment in KD. SUBJECTS AND METHODS: We retrospectively reviewed medical records of 91 children diagnosed with KD at Myong Ji Hospital from March 2012 to April 2014. Before and after (24 hours to 36 hours) IVIG treatment, the following laboratory data were obtained: hemoglobin (Hb) level, white blood cell count, proportion of neutrophil, lymphocyte and eosinophil, platelet count, erythrocyte sedimentation rate (ERS), C-reactive protein (CRP), creatine kinase (CK), creatine kinase MB (CK-MB), and N-terminal pro-brain natriuretic peptide (NT-proBNP). Subjects were then divided into two groups: IVIG-responsive or IVIG-resistant. RESULTS: Of 91 patients, 11 (12%) required retreatment. By univariate analysis, before-IVIG laboratory parameters of white blood cell count, % neutrophil, ERS, CRP, sodium, CK, CK-MB, and NT-proBNP were significantly different between IVIG-responsive and IVIG-resistant patient groups. In the after-IVIG laboratory parameters, Hb level, white blood cell count, % neutrophil, % lymphocyte, CRP, CK, CK-MB, and NT-pro-BNP were significantly different between the two groups. While the mean-differences were not statistically significant, fractional change (FC)-CRP and FC-% neutrophil showed significant difference. By multivariate analysis, FC-CRP was confirmed to be an independent predictor for initial IVIG resistance. CONCLUSION: Fractional change-C-reactive protein might be a useful and important value for predicting initial IVIG resistance in KD patients.


Subject(s)
Child , Humans , Blood Sedimentation , C-Reactive Protein , Creatine Kinase , Eosinophils , Immunization, Passive , Immunoglobulins , Immunoglobulins, Intravenous , Leukocyte Count , Lymphocytes , Medical Records , Mucocutaneous Lymph Node Syndrome , Multivariate Analysis , Neutrophils , Platelet Count , Retreatment , Retrospective Studies , Risk Factors , Sodium
13.
Article in English | WPRIM | ID: wpr-200747

ABSTRACT

Abdominal wall defect with large duodenal disruption after penetrating abdominal injury is a rare emergency situation that can result in life-threatening complications. We report on a 64-year-old man who had abdominal wall defect with large duodenal disruption after penetrating abdominal injury. The patient presented with intra-abdominal exsanguinating bleeding, duodenal disruption, and multiple small bowel perforation. The rarity of this complex injury and its initial presentation as a posttraumatic large duodenal disruption with abdominal wall defect warrant its description. The present case indicates that combining a free tissue flap with a covered expandable metallic stent can effectively and successfully repair an abdominal wall defect that is associated with a large duodenal disruption.


Subject(s)
Humans , Middle Aged , Abdominal Injuries , Abdominal Wall , Duodenum , Emergencies , Free Tissue Flaps , Hemorrhage , Stents
14.
Korean j. radiol ; Korean j. radiol;: 189-194, 2012.
Article in English | WPRIM | ID: wpr-112470

ABSTRACT

OBJECTIVE: To assess the clinical efficacy of alternative techniques for biliary stricture cannulation in patients undergoing living donor liver transplantation (LDLT), after cannulation failure with a conventional (0.035-inch guidewire) technique. SUBJECTS AND METHODS: Of 293 patients with biliary strictures after LDLT, 19 (6%) patients, 11 men and 8 women of mean age 48.5 years, had the failed cannulation of the stricture by conventional techniques. Recannulation was attempted by using two alternative methods, namely a micro-catheter set via percutaneous access and a snare (rendezvous) technique using percutaneous and endoscopic approaches. RESULTS: Strictures were successfully cannulated in 16 (84%) of the 19 patients. A microcatheter set was used in 12 and a snare technique in four patients. Stricture cannulation failed in the remaining three patients, who finally underwent surgical revision. CONCLUSION: Most technical failures using a conventional technique for biliary stricture cannulation after LDLT can be overcome by using a microcatheter set or a snare (rendezvous) technique.


Subject(s)
Adult , Female , Humans , Male , Middle Aged , Bile Ducts/surgery , Catheterization/methods , Constriction, Pathologic , Fluoroscopy , Liver Transplantation , Living Donors , Reoperation , Treatment Outcome
15.
Korean j. radiol ; Korean j. radiol;: 66-72, 2012.
Article in English | WPRIM | ID: wpr-28653

ABSTRACT

OBJECTIVE: To evaluate the safety and effectiveness of a 20-mm diameter dual-design expandable colorectal stent for malignant colorectal obstruction. MATERIALS AND METHODS: The study series included 34 patients with malignant colorectal obstruction who underwent implantation of a 20-mm dual-design expandable colorectal stent in our department between March 2009 and June 2010. The 20-mm dual-design expandable colorectal stent was placed by using a 3.8-mm delivery system that had 28-mm diameter proximal and distal ends. Among the 34 patients, stent placement for palliation was performed in 20 patients, while stent placement for bridge to surgery was performed in 14 patients. RESULTS: A 97% (33 of 34) success rate was achieved for the stent placement. The perforation rate in the bridge to surgery group was 7% (1 of 14), compared to 0% (0 of 19) in palliative group. Migration occurred in one of 33 patients (3%) at 30 days after stent placement. CONCLUSION: The placement of a 20-mm diameter dual-design stent appears to be clinically safe and effective for the management of colorectal obstruction, with low perforation and migration rates.


Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Colorectal Neoplasms/complications , Foreign-Body Migration/etiology , Intestinal Obstruction/etiology , Intestinal Perforation/etiology , Palliative Care , Prospective Studies , Prosthesis Design , Stents , Treatment Outcome
16.
Korean j. radiol ; Korean j. radiol;: S83-S88, 2012.
Article in English | WPRIM | ID: wpr-23427

ABSTRACT

OBJECTIVE: To investigate the technical feasibility, clinical usefulness, and safety of a guiding sheath in fluoroscopic stent placement for patients with malignant colorectal obstructions. MATERIALS AND METHODS: Between June 2007 and January 2011, fluoroscopic placement of a dual colorectal stent was attempted in a total of 97 patients with malignant colorectal obstructions. A polytetrafluoroethylene guiding sheath was used in patients in whom a stent delivery system failed to reach the obstruction. Usefulness of the sheath was evaluated depending on whether the sheath could successfully assist the stent delivery system reach its area of interest. RESULTS: The guiding sheath was needed in 22 patients (15 men, 7 women; age range, 33-77 years; mean age, 59 years). The overall success rate for passing the sheath to the area of interest was 100%. There were no procedure-related deaths or major complications. The majority of the patients reported mild discomfort. In 2 of 22 patients with successful passing of the sheath to the area of interest, stent placement failed because of failure in the negotiation of a guide wire through the obstruction. CONCLUSION: Using a guiding sheath seems to be easy, safe and useful in fluoroscopic stent placement for patients with malignant colorectal obstructions.


Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Colorectal Neoplasms/surgery , Equipment Safety , Feasibility Studies , Fluoroscopy , Intestinal Obstruction/surgery , Polytetrafluoroethylene , Stents , Treatment Outcome
17.
Gut and Liver ; : S32-S38, 2010.
Article in English | WPRIM | ID: wpr-220178

ABSTRACT

Unresectable malignant gastric outlet obstruction (GOO) severely affects the quality of life, with complications that include nausea, vomiting, aspiration, pain, and malnutrition. Although palliative surgical procedures have been traditionally performed, they are associated with high morbidity and mortality rates. Placing self-expandable metallic stents is associated with higher clinical success rates, lower morbidity, shorter time from the procedure to starting oral intake, lower incidence of delayed gastric emptying, and a shorter hospital stay than palliative surgery. Fluoroscopic or endoscopic placement of either bare or covered self-expandable metallic stents is a safe, nonsurgical, palliative treatment option for unresectable malignant GOOs, with a high clinical success rate and a low rate of serious complications. Stent obstruction and migration are the most common complications, but most can be managed by interventional treatments. Although there have been substantial developments in stent design over the past decade, large prospective, randomized studies are required to determine the ideal stent for malignant GOOs.


Subject(s)
Endoscopy , Fluoroscopy , Gastric Emptying , Gastric Outlet Obstruction , Incidence , Length of Stay , Malnutrition , Nausea , Palliative Care , Quality of Life , Stents , Vomiting
18.
Korean j. radiol ; Korean j. radiol;: 497-506, 2010.
Article in English | WPRIM | ID: wpr-207992

ABSTRACT

Benign strictures of the esophagus and gastric outlet are difficult to manage conservatively and they usually require intervention to relieve dysphagia or to treat the stricture-related complications. In this article, authors review the non-surgical options that are used to treat benign strictures of the esophagus and gastric outlet, including balloon dilation, temporary stent placement, intralesional steroid injection and incisional therapy.


Subject(s)
Humans , Catheterization , Electrocoagulation , Endoscopy, Gastrointestinal , Esophageal Stenosis/therapy , Gastric Outlet Obstruction/therapy , Injections, Intralesional , Radiography, Interventional , Stents , Steroids/administration & dosage
19.
Korean j. radiol ; Korean j. radiol;: 133-140, 2010.
Article in English | WPRIM | ID: wpr-127085

ABSTRACT

An esophagorespiratory fistula (ERF) is an often fatal consequence of esophageal or bronchogenic carcinomas. The preferred treatment is placement of esophageal and/or airway stents. Stent placement must be performed as quickly as possible since patients with ERFs are at a high risk for aspiration pneumonia. In this review, choice of stents and stenting area, fistula reopening and its management, and the long-term outcome in the interventional management of malignant ERFs are considered. Lastly, a review of esophagopulmonary fistulas will also be provided.


Subject(s)
Humans , Bronchial Neoplasms/complications , Esophageal Fistula/etiology , Esophageal Neoplasms/complications , Esophagus/surgery , Palliative Care/methods , Quality of Life , Respiratory System/surgery , Respiratory Tract Fistula/etiology , Stents , Treatment Outcome
20.
Korean j. radiol ; Korean j. radiol;: 364-370, 2008.
Article in English | WPRIM | ID: wpr-215037

ABSTRACT

A benign anastomotic stricture is a common complication of upper gastrointestinal (UGI) surgery and is difficult to manage conservatively. Fluoroscopically guided balloon dilation has a number of advantages and is a safe and effective procedure for the treatment of various benign anastomotic strictures in the UGI tract.


Subject(s)
Humans , Anastomosis, Surgical , /adverse effects , Constriction, Pathologic/etiology , Esophagus/surgery , Fluoroscopy , Postoperative Complications , Stomach/surgery
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