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Endoscopic sphincterotomy (EST) is a basic procedure for pancreatobiliary endoscopy and is currently widely performed as a standard procedure for the treatment of various pancreatobiliary diseases worldwide. Later, in 1982, endoscopic papillary balloon dilation (EPBD) was introduced as an alternative to EST, and EPBD is known to reduce the risk of bleeding and perforation compared to EST. In order to safely and effectively perform EST and EPBD procedures, it is essential to select an appropriate target for the procedure, as well as to understand and familiarize with the anatomical structure of the duodenal papilla, related instruments, and basic techniques of EST and EPBD.
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Endoscopic retrograde cholangiopancreatography (ERCP) is a procedure that requires significant experiences and skills and has various procedure-related complications, some of which can be severe and even result in the death of patients. Expanding ERCP availability has the advantage of increasing accessibility for patients. However, ERCP poses a substantial risk if performed without proper quality management. ERCP quality management is essential for both ensuring safe and successful procedures and meeting the social demands for enhanced healthcare competitiveness and quality assurance. To address these concerns, the Korean Pancreatobiliary Association established a task force to develop ERCP quality indicators (QIs) tailored to the Korean medical environment. Key questions for five pre-procedure, three intra-procedure, and four post-procedure measures were formulated based on a literature search related to ERCP QIs and a comprehensive clinical review conducted by experts. The statements and recommendations regarding each QI item were selected through peer review. The developed ERCP QIs were reviewed by external experts based on the latest available evidence at the time of development.These domestically tailored ERCP QIs are expected to contribute considerably to improving ERCP quality in Korea.
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Background/Aims@#This study aimed to investigate the patterns of preferred endoscopic procedure types and techniques for managing difficult common bile duct (CBD) stones in South Korea. @*Methods@#The Committee of Policy and Quality Management of Korean Pancreatobiliary Association (KPBA) conducted a survey containing 19 questions. Both paper and online surveys were carried out; with the paper survey being conducted during the 2019 Annual Congress of KPBA and the online survey being conducted through Google Forms from April 2020 to February 2021. @*Results@#The response rate was approximately 41.3% (86/208). Sixty-two (73.0%) worked at tertiary hospitals or academic medical centers, and 60 (69.7%) had more than 5 years of endoscopic retrograde cholangiopancreatography experience. The preferred size criteria for large CBD stones were 15 mm (40.6%), 20 mm (31.3%), and 30 mm (4.6%). For managing of large CBD stones, endoscopic papillary large balloon dilation after endoscopic sphincterotomy was the most preferred technique (74.4%). When performing procedures in those with bleeding diathesis, 64 (74.4%) respondents favored endoscopic papillary balloon dilation (EPBD) alone or EPBD with small endoscopic sphincterotomy. Fifty-five respondents (63.9%) preferred the doubleguidewire technique when faced with difficult bile duct cannulation in patients with periampullary diverticulum. In surgically altered anatomies, cap-fitted forward viewing endoscopy (76.7%) and percutaneous transhepatic cholangioscopy (48.8%) were the preferred techniques for Billroth-II anastomosis and total gastrectomy with Roux-en-Y anastomosis, respectively. @*Conclusions@#Most respondents showed unifying trends for the management of difficult CBD stones. The current practice patterns could be used as basic data for clinical quality improvements in the management of difficult CBD stones.
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Background/Aims@#Although endoscopic ultrasound (EUS)-guided fine needle aspiration (FNA) and fine needle biopsy (FNB) are widely used for tissue acquisition of pancreatic solid mass, the optimal strategy of this procedure has not been established yet. The aim of this nationwide study was to investigate the current practice patterns of EUS-FNA/FNB for pancreatic solid mass in Korea. @*Methods@#The Policy-Quality Management of the Korean Pancreatobiliary Association (KPBA) developed a questionnaire containing 22 questions. An electronic survey consisting of the questionnaire was distributed by e-mail to members registered to the KPBA. @*Results@#A total of 101 respondents completed the survey. Eighty respondents (79.2%) performed preoperative EUS-FNA/FNB for operable pancreatic solid mass. Acquire needles (60.4%) were used the most, followed by ProCore needles (47.5%). In terms of need size, most respondents (>80%) preferred 22-gauge needles regardless of the location of the mass. Negative suction with a 10-mL syringe (71.3%) as sampling technique was followed by stylet slow-pull (41.6%). More than three needle passes for EUS-FNA/FNB was performed by most respondents (>80%). The frequency of requiring repeated procedure was significantly higher in respondents with a low individual volume (<5 per month, p=0.001). Prophylactic antibiotics were routinely used in 39 respondents (38.6%); rapid on-site pathologic evaluation was used in 6.1%. @*Conclusions@#According to this survey, practices of EUS-FNA/FNB for pancreatic solid mass varied substantially, some of which differed considerably from the recommendations present in existing guidelines. These results suggest that the development of evidence-based quality guidelines fitting Korean clinical practice is needed to establish the optimal strategy for this procedure.
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Background/Aims@#The study aimed to investigate the current practice patterns in the management of pancreatic cystic neoplasms in Korea. @*Methods@#An electronic survey was systematically distributed by email to members of the Korean Pancreatobiliary Association from December 2019 to February 2020. @*Results@#In total, 115 (110 gastroenterologists, five surgeons) completed the survey, 72.2% of whom worked in a tertiary/academic medical center. Most (65.2%) followed the 2012/2017 International Association of Pancreatology guidelines for the management of pancreatic cystic neoplasms. A gadolinium-enhanced magnetic resonance imaging/magnetic resonance cholangiopancreatography was the most common first-line diagnostic modality (42.1%), but a contrast-enhanced computed tomography scan was preferred as a subsequent surveillance tool (58.3%). Seventy- four percent of respondents routinely performed endoscopic ultrasound-guided fine needle aspiration for pancreatic cystic neoplasms with suspicious mural nodules. Endoscopic ultrasound-guided fine needle aspiration cytology (94.8%) and cystic fluid carcinoembryonic antigen (95.7%) were used for cystic fluid analysis. Most (94%) typically recommended surgery in patients with high-risk stigmata, but 18.3% also considered proceeding with surgery in patients with worrisome features. Most (96.5%) would continue surveillance of pancreatic cystic neoplasms for more than 5 years. @*Conclusions@#According to this survey, there was variability in the management of pancreatic cystic neoplasms among the respondents. These results suggest that the development of evidence-based guidelines for pancreatic cystic neoplasms that fit the Korean practice is needed to create an optimal approach to the management of pancreatic cystic neoplasms.
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To date, there is no standardization of the endoscopi c retrograde cholangiopancreatography (ERCP) room setting regarding with the size, equipment or space arrangement. Therefore, the authors visited 11 tertiary hospitals that recently remodeled or newly designed the ERCP room to analyze and identify their advantages and disadvantages. The ERCP room should have enough space for equipments including fluoroscopy, endoscopy, electrosurgical unit, preparation table and for patient movement. The EUS room does not require an independent space unless it is a very large scale hospital, and the ERCP room can be shared. Considering the pros and cons of each equipment, adequate fluoroscopic device should be selected depending on the hospital circumstance. Expensive equipment for X-ray fluoroscopy system is not necessarily good, and it is necessary to install equipment suitable for each hospital situation by understanding the advantages and disadvantages of fluoroscopy. For prevention of ERCP-related radiation hazard, both endoscopist and assistants should wear radiation-blocking apron, thyroid protectors, and lead glasses. Furthermore, a shield that can block radiation between the endoscopist and the patient should be installed to protect high-energy scattered waves. One-way direction should be designed to prevent cross infection when moving the endoscopic equipment from the ERCP to the cleaning room. If possible, it is recommended to keep a cardiopulmonary resuscitation cart in the ERCP room.
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To date, there is no standardization of the endoscopi c retrograde cholangiopancreatography (ERCP) room setting regarding with the size, equipment or space arrangement. Therefore, the authors visited 11 tertiary hospitals that recently remodeled or newly designed the ERCP room to analyze and identify their advantages and disadvantages. The ERCP room should have enough space for equipments including fluoroscopy, endoscopy, electrosurgical unit, preparation table and for patient movement. The EUS room does not require an independent space unless it is a very large scale hospital, and the ERCP room can be shared. Considering the pros and cons of each equipment, adequate fluoroscopic device should be selected depending on the hospital circumstance. Expensive equipment for X-ray fluoroscopy system is not necessarily good, and it is necessary to install equipment suitable for each hospital situation by understanding the advantages and disadvantages of fluoroscopy. For prevention of ERCP-related radiation hazard, both endoscopist and assistants should wear radiation-blocking apron, thyroid protectors, and lead glasses. Furthermore, a shield that can block radiation between the endoscopist and the patient should be installed to protect high-energy scattered waves. One-way direction should be designed to prevent cross infection when moving the endoscopic equipment from the ERCP to the cleaning room. If possible, it is recommended to keep a cardiopulmonary resuscitation cart in the ERCP room.
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Paradoxical reactions to tuberculosis (TB) treatment are characterized by an initial improvement of the clinical symptoms followed by clinical or radiological deterioration of existing tuberculous lesions, or by development of new lesions. Intestinal perforation in gastrointestinal TB can occur as a paradoxical reaction to antitubercular therapy. A 55-year-old man visited the outpatient department with lower abdominal pain and weight loss. He was diagnosed with intestinal TB and started antitubercular therapy. After 3 months of antitubercular therapy, a colonoscopy revealed improvement of the disease. Three days after the colonoscopy, the patient visited the emergency room complaining of abdominal pain. Abdominal computed tomography revealed extraluminal air-filled spaces in the pelvic cavity. We diagnosed a small bowel perforation and performed an emergency laparotomy and a right hemicolectomy with small bowel resection. This report describes the case of intestinal perforation presenting as a paradoxical reaction to antitubercular and provides a brief literature review.
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Paradoxical reactions to tuberculosis (TB) treatment are characterized by an initial improvement of the clinical symptoms followed by clinical or radiological deterioration of existing tuberculous lesions, or by development of new lesions. Intestinal perforation in gastrointestinal TB can occur as a paradoxical reaction to antitubercular therapy. A 55-year-old man visited the outpatient department with lower abdominal pain and weight loss. He was diagnosed with intestinal TB and started antitubercular therapy. After 3 months of antitubercular therapy, a colonoscopy revealed improvement of the disease. Three days after the colonoscopy, the patient visited the emergency room complaining of abdominal pain. Abdominal computed tomography revealed extraluminal air-filled spaces in the pelvic cavity. We diagnosed a small bowel perforation and performed an emergency laparotomy and a right hemicolectomy with small bowel resection. This report describes the case of intestinal perforation presenting as a paradoxical reaction to antitubercular and provides a brief literature review.
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Background/Aims@#The work environment in which endoscopic retrograde cholangiopancreatography (ERCP) is conducted has influence on its efficacy and safety. We aimed to assess the current status of ERCP work environments and to investigate the trends associated with the basic techniques of ERCP in Korea. @*Methods@#The work environment and information on the basic techniques of ERCP were acquired by the Korean Pancreatobiliary Association (KPBA) through a national survey in 2019. The survey was performed at the KPBA conference in 2019. The contents of survey comprised of the current environment of ERCP, preparation before ERCP, and the preferred basic techniques used in ERCP. @*Results@#Completed questionnaires were returned from 84 KPBA members. The mean ERCP volume per year was approximately 500. About 60% (50/84) reported that they worked with a dedicated ERCP team with experienced nurses. Two-thirds (57/84, 68%) answered that they had a fluoroscopy room used solely for ERCP procedures. All respondents intravenously hydrated the patient to prevent post-ERCP pancreatitis (84/84, 100%). The preferred procedural sedations were balanced propofol sedation (50%) and midazolam-only sedation (47%). Wire-guided cannulation was most commonly used for selective cannulation (81%). Endoscopic retrograde biliary drainage was preferred over endoscopic nasobiliary drainage (60% vs 22%). The initial method of ampullary intervention was endoscopic sphincterotomy in 60%. @*Conclusions@#Data from the survey involving a large number of Korean ERCP doctors revealed considerable variabilities with regard to the work environment and basic techniques of ERCP in Korea. The study provides information regarding the current trends of ERCP that can be used to establish ERCP standards in Korea.
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BACKGROUND/AIMS: The aim of this study is to describe the outcome of the national survey and to determine the endoscopic retrograde cholangiopancreatography (ERCP) quality in Korea by comparing with the quality indicators. METHODS: We used the database of Health Insurance Review & Assessment Service and then performed anonymous national survey. RESULTS: Completed questionnaires were returned by 129 of 157 ERCP endoscopists. In Korea, annual ERCP rates have been consistently increased over years. Individual ERCP volume was high (>200 per year) in about half of ERCP endoscopists. Most ERCP endoscopists performed all of level I procedures. However, manometry, cholangiopancreatoscopy, and pancreatic procedures were performed mostly in institutions with high hospital volume. The rate of overall success was more than 90% in most ERCP endoscopists. However, the rate of precut sphincterotomy was high in more than a fourth of ERCP endoscopists. Twelve ERCP endoscopists experienced post-ERCP mortality within recent 1 year. ERCP training and radiation protection during ERCP did not meet the standard of quality indicators especially in institutions with low or moderate hospital volume. CONCLUSIONS: Technical issues during ERCP procedures in Korea fulfill the standard of quality indicators. However, a great effort is needed to improve issues about ERCP training and radiation protection.
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Anónimos y Seudónimos , Colangiopancreatografia Retrógrada Endoscópica , Seguro de Salud , Corea (Geográfico) , Manometría , Mortalidad , Protección Radiológica , República de Corea , Encuestas y CuestionariosRESUMEN
During laparoscopic cholecystectomy, a surgical clip is used to control the cystic duct and cystic artery. In the past, metallic clips were usually used, but over recent years, interest in the use of Hem-o-lok clips has increased. Surgical clip migration into the common bile duct (CBD) after laparoscopic cholecystectomy has rarely been reported and the majority of reported cases involved metallic clips. In this report, we describe the case of a 53-year-old woman who presented with abdominal pain caused by migration of a Hem-o-lok clip into the CBD. The patient had undergone laparoscopic cholecystectomy 10 months previously. Abdominal CT revealed an indistinct, minute, radiation-impermeable object in the distal CBD. The object was successfully removed by sphincterotomy via ERCP using a stone basket and was identified as a Hem-o-lok clip.
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Femenino , Humanos , Persona de Mediana Edad , Dolor Abdominal , Arterias , Colangiopancreatografia Retrógrada Endoscópica , Colecistectomía , Colecistectomía Laparoscópica , Conducto Colédoco , Conducto Cístico , Migración de Cuerpo Extraño , Instrumentos Quirúrgicos , Tomografía Computarizada por Rayos XRESUMEN
Percutaneous endoscopic gastrostomy (PEG) is widely used to provide nutritional support for patients with dysphagia and/or disturbed consciousness preventing oral ingestion, and PEG tube placement is a relatively safe and convenient non-surgical procedure performed under local anesthesia. However, the prevention of PEG-insertion-related complications is important. A 64-year-old man with recurrent pneumonia underwent tracheostomy and nasogastric tube placement for nutritional support and opted for PEG tube insertion for long-term nutrition. However, during the insertion procedure, needle puncture had to be attempted twice before successful PEG tube placement was achieved, and a day after the procedure his hemoglobin had fallen and he developed hypotension. Abdominal computed tomography revealed injury to a pancreatic branch of the superior mesenteric artery (SMA) associated with bleeding, hemoperitoneum, and pancreatitis. Transarterial embolization was performed using a microcatheter to treat hemorrhage from the injured branch of the SMA, and the acute pancreatitis was treated using antibiotics and supportive care. The patient was discharged after an uneventful recovery. Clinicians should be mindful of possible pancreatic injury and bleeding after PEG tube insertion. Possible complications, such as visceral injuries or bleeding, should be considered in patients requiring multiple puncture attempts during a PEG procedure.
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Humanos , Persona de Mediana Edad , Anestesia Local , Angiografía , Antibacterianos , Estado de Conciencia , Trastornos de Deglución , Ingestión de Alimentos , Endoscopía , Gastrostomía , Hemoperitoneo , Hemorragia , Hipotensión , Arteria Mesentérica Superior , Agujas , Apoyo Nutricional , Pancreatitis , Neumonía , Punciones , TraqueostomíaRESUMEN
BACKGROUND/AIMS: Growth differentiation factor 15 (GDF-15) belongs to the transforming growth factor-β superfamily. GDF-15 is emerging as a biomarker for several diseases. The aim of this study was to determine the clinical performances of GDF-15 for the prediction of liver fibrosis and severity in chronic liver disease. METHODS: The serum GDF-15 levels were examined via enzyme immunoassay in 145 patients with chronic liver disease and 101 healthy individuals. The patients with chronic liver disease consisted of 54 patients with chronic hepatitis, 44 patients with compensated liver cirrhosis, and 47 patients with decompensated liver cirrhosis. RESULTS: Of the patients with chronic liver diseases, the decompensated liver cirrhosis patients had an increased serum GDF-15 (3,483 ng/L) level compared with the patients with compensated liver cirrhosis (1,861 ng/L) and chronic hepatitis (1,232 ng/L). The overall diagnostic accuracies of GDF-15, as determined by the area under the receiver operating characteristic curves, were as follows: chronic hepatitis=0.656 (>574 ng/L, sensitivity, 53.7%; specificity, 79.2%), compensated liver cirrhosis=0.886 (>760 ng/L, sensitivity, 75.6%; specificity, 92.1%), and decompensated liver cirrhosis=0.984 (>869 ng/L, sensitivity, 97.9%; specificity, 94.1%). CONCLUSIONS: This investigation represents the first study to demonstrate the availability of GDF-15 in chronic liver disease. GDF-15 comprised a useful biomarker for the prediction of liver fibrosis and severity in chronic liver disease.
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Humanos , Biomarcadores , Fibrosis , Factor 15 de Diferenciación de Crecimiento , Hepatitis Crónica , Técnicas para Inmunoenzimas , Cirrosis Hepática , Hepatopatías , Hígado , Curva ROC , Sensibilidad y EspecificidadRESUMEN
Complications that may occur after an endoscopic retrograde cholangiopancreatography (ERCP) procedure include pancreatitis, bleeding, cholangitis, cholecystis, perforation, and post-ERCP pancreatitis (PEP). Of these, PEP is the most common complication and 10% of patients can die from severe pancreatitis. Prevention of PEP requires the selection of an appropriate patient group according to their ERCP indications and a full awareness of the risk factors. The incidence rate can be reduced to some extent through medication and ERCP manipulation changes. The use of a spile through the guidewire during ERCP manipulation and temporary pancreatic duct stent insertion can be effective, and the administration of suppository NSAIDs as medication reduces the occurrence of PEP. Drugs such as glyceryl trinitrate (GTN), nafamostat, and somatostatin can be considered as the second best treatment in the cases where NSAIDs are contraindicated or where a plastic catheter cannot be inserted or fails after insertion into the pancreatic duct.
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Humanos , Antiinflamatorios no Esteroideos , Catéteres , Colangiopancreatografia Retrógrada Endoscópica , Colangitis , Hemorragia , Incidencia , Nitroglicerina , Conductos Pancreáticos , Pancreatitis , Plásticos , Factores de Riesgo , Somatostatina , StentsRESUMEN
The reported prevalence of PVT is in the range of 0.6-15.8% in patient with liver cirrhosis or portal hypertension. If the patient has hepatocellular carcinoma, thrombus is likely to be malignant thrombus. Malignancy, frequently of hepatic origin, is responsible for 21-24% of over all cases. The overall mortality rate of chronic PVT has been reported to be less than 10%, but is increased to 26% when associated with hepatocellular carcinoma and cirrhosis. However, no treatment guideline has been established on anticoagulant therapy for PVT in patients with concomitant hepatocellular carcinoma and cirrhosis. Because actually it is not easy to distinguish between malignant thrombus and benign thrombus in clinical aspect, PVT in hepatocellular carcinoma are still debatable whether or not treatment when it diagnosed. We present 3 cases of portal vein thrombosis successfully treated with anticoagulation in hepatocellular carcinoma and liver cirrhosis, and we include a literature review.
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Humanos , Anticoagulantes , Carcinoma Hepatocelular , Fibrosis , Hipertensión Portal , Cirrosis Hepática , Hígado , Mortalidad , Vena Porta , Prevalencia , Trombosis , Trombosis de la VenaRESUMEN
Hepatocellular carcinoma (HCC) is usually associated with chronic liver disease such as liver cirrhosis. Primary HCC lesions and even recurrent intrahepatic lesions can be treated successfully by using variable modalities applicable to intrahepatic lesions. HCC can cause intrahepatic multiple occurrence and extrahepatic metastasis. Extrahepatic metastasis occurs in up to about 60% of patients of HCC, and a major of patients with extrahepatic HCC had late intrahepatic stage of tumor. Themost frequent site of extrahepatic metastasis of HCC was the lung. HCC metastasized to soft tissues was unusually reported. Extrahepatic metastasis of HCC, especially to unusual site, should not be overlooked and must be able to be controlled. We experienced a case that HCC was metastasized to the pronator quadratus muscle of right wrist and chould be removed surgically.
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Humanos , Carcinoma Hepatocelular , Cirrosis Hepática , Hepatopatías , Pulmón , Músculo Esquelético , Metástasis de la Neoplasia , MuñecaRESUMEN
A polypoid lesions of the gallbladder (PLGs) is defined as any elevated lesion of the mucosal surface of the gallbladder wall. Even though most of the gallbladder polyps are benign in nature, malignant polyps are found in some cases. Because advanced gallbladder cancer displays poor prognosis, early detection and appropriate early measures are important for curative treatment and improvement in long-term survival. Patients who have GB polyps are usually almost always asymptomatic and often diagnosed incidentally by abdomen CT scan or transabdominal ultrasonography (TAUS) imaging. However TAUS and CT scan can not differentiate precancerous and cancerous lesions from cholesterol polyps. To increase the diagnostic accuracy, New imanging modality is being performed. Of the available tests, the accuracy of EUS (or CEH-EUS) for the differentiation of neoplastic from nonneoplastic polyps was higher than that of transabdominal US or CT scan. The cholecystectomy should be undertaken only in cases where there are clinical signs of gallbladder polyps, polyps with diameters greater than 10 mm, fast-growing polyps, sessile polyps or wide-based polyps, patient aged over 50, concurrent gallstones, polyps of the gallbladder in fundibulum or abnormal gallbladder wall US. Gallbladder polyps that are not resected should be followed-up with serial ultrasound examinations. guidelines on the screening interval are not yet available, but follow-up with the same modality is generally recommended after 3-6 months. If there are no changes in size, contour, or vascualrity, the follow-up should be individualized; most often a follow up after another 12-24 months could be recommended up to 5 years at least.
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Humanos , Abdomen , Colecistectomía , Colesterol , Diagnóstico , Estudios de Seguimiento , Neoplasias de la Vesícula Biliar , Vesícula Biliar , Cálculos Biliares , Tamizaje Masivo , Pólipos , Pronóstico , Tomografía Computarizada por Rayos X , UltrasonografíaRESUMEN
BACKGROUND/AIMS: The current study examines the expression of molecular biomarkers in hepatocellular carcinoma (HCC) and whether these findings correlate with the clinicopathologic features of the disease and patient survival. METHODS: We analyzed the immunohistochemical expression of p53, mammalian target of rapamycin (mTOR), c-Met, and insulin-like growth factor 1 receptor (IGF-1R) heat shock protein 70 (HSP70) with the clinicopathologic features of 83 HCCs. RESULTS: p53 expression was higher in the male patients with undifferentiated histological tumor grades, cirrhosis, and portal vein invasion. High 48 c-Met expression correlated with cirrhosis, and high mTOR expression correlated with the tumor grade and cirrhosis. High IGF-1R expression correlated with the tumor grade and cirrhosis. A multivariate analysis identified a significant relationship between the high expression of p53, tumor grade, and portal vein invasion. In addition, a high expression of mTOR was related to tumor grade and cirrhosis, and a high expression of HSP70 was related to portal vein invasion in a multivariate analysis. The Kaplan-Meier survival curve for patients with high versus low Edmondson grades and p53 expression was statistically significant. CONCLUSIONS: p53, mTOR, and IGF-1R expression correlated with the Edmondson tumor grade in a univariate analysis, while p53 and mTOR correlated with the Edmondson tumor grade in a multivariate analysis. In addition, the tumor grade was found to predict survival. p53 was primarily related to the clinicopathologic features compared to other markers, and it is a poor prognostic factor of survival.
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Adulto , Anciano , Femenino , Humanos , Masculino , Persona de Mediana Edad , Carcinoma Hepatocelular/metabolismo , Supervivencia sin Enfermedad , Proteínas HSP70 de Choque Térmico/metabolismo , Neoplasias Hepáticas/metabolismo , Pronóstico , Proteínas Proto-Oncogénicas c-met/metabolismo , Receptor IGF Tipo 1/metabolismo , Estudios Retrospectivos , Factores de Riesgo , Serina-Treonina Quinasas TOR/metabolismo , Resultado del Tratamiento , Biomarcadores de Tumor/metabolismo , Proteína p53 Supresora de Tumor/metabolismoRESUMEN
BACKGROUND/AIMS: Epithelial-mesenchymal transition (EMT)-related proteins may exhibit differential expression in intestinal type or pancreatobiliary type ampulla of Vater carcinomas (AVCs). We evaluated the expression of E-cadherin, beta-catenin, and S100A4 in intestinal and nonintestinal type AVCs and analyzed their relationships with clinicopathological variables and survival. METHODS: A clinicopathological review of 105 patients with AVCs and immunohistochemical staining for E-cadherin, beta-catenin, and S100A4 were performed. The association between clinicopathological parameters, histological type, and expression of EMT proteins and their effects on survival were analyzed. RESULTS: Sixty-five intestinal type, 35 pancreatobiliary type, and five other types of AVCs were identified. The severity of EMT changes differed between the AVC types; membranous loss of E-cadherin and beta-catenin was observed in nonintestinal type tumors, whereas aberrant nonmembranous beta-catenin expression was observed in intestinal type tumors. EMT-related changes were more pronounced in the invasive tumor margin than in the tumor center, and these EMT-related changes were related to tumor aggressiveness. Among the clinicopathological parameters, a desmoplastic reaction was related to overall survival, and the reaction was more severe in nonintestinal type than in intestinal type AVCs. CONCLUSIONS: Dysregulation of E-cadherin, beta-cadherin, and S100A4 expression may play a role in the carcinogenesis and tumor progression of AVCs.