Curriculum for diagnostic endoscopic ultrasound training in Europe: European Society of Gastrointestinal Endoscopy (ESGE) Position Statement.

The European Society of Gastrointestinal Endoscopy (ESGE) has recognized the need to formalize and enhance training in diagnostic endoscopic ultrasound (EUS). This manuscript represents the outcome of a formal Delphi process resulting in an official Position Statement of the ESGE and provides a framework to develop and maintain skills in diagnostic EUS. This curriculum is set out in terms of the prerequisites prior to training; the recommended steps of training to a defined syllabus; the quality of training; and how competence should be defined and evidenced before independent practice. 1: Trainees should have achieved competence in upper gastrointestinal endoscopy before training in diagnostic EUS. 2: The development of diagnostic EUS skills by methods that do not involve patients is advisable, but not mandatory, prior to commencing formal training in diagnostic EUS. 3: A trainee's principal trainer should be performing adequate volumes of diagnostic EUSs to demonstrate maintenance of their own competence. 4: Training centers for diagnostic EUS should offer expertise, as well as a high volume of procedures per year, to ensure an optimal level of quality for training. Under these conditions, training centers should be able to provide trainees with a sufficient wealth of experience in diagnostic EUS for at least 12 months. 5: Trainees should engage in formal training and supplement this with a range of learning resources for diagnostic EUS, including EUS-guided fine-needle aspiration and biopsy (FNA/FNB). 6: EUS training should follow a structured syllabus to guide the learning program. 7: A minimum procedure volume should be offered to trainees during diagnostic EUS training to ensure that they have the opportunity to achieve competence in the technique. To evaluate competence in diagnostic EUS, trainees should have completed a minimum of 250 supervised EUS procedures: 80 for luminal tumors, 20 for subepithelial lesions, and 150 for pancreaticobiliary lesions. At least 75 EUS-FNA/FNBs should be performed, including mostly pancreaticobiliary lesions. 8: Competence assessment in diagnostic EUS should take into consideration not only technical skills, but also cognitive and integrative skills. A reliable valid assessment tool should be used regularly during diagnostic EUS training to track the acquisition of competence and to support trainee feedback. 9: A period of supervised practice should follow the start of independent activity. Supervision can be delivered either on site if other colleagues are already practicing EUS or by maintaining contacts with the training center and/or other EUS experts. 10: Key performance measures including the annual number of procedures, frequency of obtaining a diagnostic sample during EUS-FNA/FNB, and adverse events should be recorded within an electronic documentation system and evaluated.

Endoscopic ultrasound-guided perivascular pancreatic radiofrequency ablation using a hydroxyethyl starch solution prior to pancreatectomy.

Background and study aims Pancreatic surgery remains complex, particularly for borderline resectable and locally advanced tumors. Vascular invasion compromises resectability, and vascular resection entails increased morbidity and mortality. Following a feasibility and safety demonstration of augmented endoscopic ultrasound (EUS)-guided radiofrequency ablation (RFA) using hydroxyethyl starch (HES) in porcine pancreatic parenchyma, the present study assesses whether this approach (EUS-sugar-RFA) in the pancreatic perivascular space is safe and creates a controllable margin of necrosis to enable a vessel-sparing resection. Methods EUS-sugar-RFA in the pancreatic parenchyma adjacent to the splenic artery and vein was performed in a live animal model. Following different survival periods (0-4 days) in the interventional group (n = 3), open pancreatectomy was carried out. The control group (n = 4) included open pancreatectomies in two pigs with non-treated pancreases and in two with pancreatic RFA alone on the same day. Results All procedures were completed successfully, without intraoperative or postoperative complications. Survival periods were uncomplicated. Histopathological examination showed local necrosis and inflammatory reaction at the ablation sites. Vascular wall integrity was preserved in all specimens. The untreated pancreatic zones in the interventional group were no different from the normal pancreases in the control group. Conclusions Preoperative perivascular augmented RFA using HES was safe, and in the pancreatic animal model, the best timeframe was within 24 hours before pancreatic surgery. This technique might improve resectability in selected borderline and locally advanced pancreatic cancers.

Development and validation of a novel porcine bile duct dilation model for EUS training.

Background and study aims Image-guided minimally invasive techniques have transformed the management of malignant and benign bile duct obstructions. These evolving techniques are being widely adopted and applied and hands-on training using high quality models is required to improve the proficiency of practitioners. This experimental study aimed to validate an in vivo porcine model created to simulate bile duct dilation for interventional endoscopic ultrasound (EUS) hands-on training curriculums. Materials and methods Thirty-six porcine models were involved and the procedures were performed in an experimental hybrid operating room under general anesthesia. Animals underwent endoscopic duodenal papilla clipping with several hemostatic metallic clips. After a survival period of 24 to 48 hours, the models with effective intrahepatic and extrahepatic bile duct dilatation were included in the hands-on training. Trainees and faculty were given structured evaluations of the model realism and usefulness. Results Extrahepatic bile duct and gallbladder dilation was achieved in all 36 of the models, and in 11 of the 36 models, a treatable intrahepatic duct dilatation was achieved. During the hands-on training, EUS-guided biliary drainage, EUS-guided transgastric gallbladder drainage, and EUS through-the-needle microbiopsy forceps procedures were feasible. Overall, 75 % of the experts and trainees evaluated the training as excellent. Conclusions We present a minimally invasive, reliable and time- effective model of extrahepatic dilation suitable for interventions. The model was less effective for intrahepatic ducts, which should be considered if intrahepatic biliary dilation is required for training.

Design and validation of a therapeutic EUS training program using a live animal model: Taking training to the next level.

Background and Objectives: EUS has evolved into a therapeutic modality for gastrointestinal disorders. Simulators, ex vivo models, and phantoms are the current teaching methods for therapeutic EUS (TEUS). We create and evaluate a high-fidelity simulated live animal model (HiFi SAM) for teaching endoscopists TEUS. Materials and Methods: Designing a curriculum that uses HiFi SAM and enables trainees to perform realistic procedures with expert mentors. Results: Twenty-seven trainees participated in a 3-day program with 6 h of theoretical and 14 h of hands using life HiFi SAM. Eighteen experts participated. Twenty-two (20-25) TEUS were defined for each HiFi SAM, and 616 were performed in all. Of 616/264 (43%) were evaluated with a mean of 88 per course (ranging between 80 and 95). Ninety-one percent (240/264) of the procedures were completed successfully. In 24, success was not achieved due to technical and/or model problems. Student rating of HiFi SAM was: 71% excellent rating (scale 8-10) and 95% excellent/good. The HiFi SAM procedure evaluation was (scale 1-5): fine-needle biopsy: 4.79, radiofrequency: 4.76, common bile duct and gallbladder drainage: 4.75, cystic drainages: 4.72, neurolysis: 4.55, microbiopsy: 4.50, and hepatogastric drainage: 4.04, with an overall satisfaction rate of 4.56 (91%). A short survey showed: 83% would recommend absolutely (17% most likely), 33% think that ITEC training was sufficient for their practice, and 66% would like additional training, especially more practice in specific techniques rather than more clinical case discussion. Regarding impact on their practice, 66% of the trainees started a new procedure and/or noted improvement in previous ones. Conclusion: HiFi SAM is a complex model; however, experts and trainees are satisfied with the training this new curriculum provided.

Differences between sporadic hyperplastic gastric polyps and portal hypertensive gastric polyps: a review.

Portal hypertension (PH) is one of the most severe complications of chronic liver diseases. It is defined as an increase in pressure in the portal venous system which results in a portosystemic gradient >5 mmHg. In the western world, cirrhosis is the most frequent cause of PH, mainly due to nonalcoholic fatty liver disease and alcoholic liver disease. Patients with PH have esophageal varices in 68-73% of cases, portal hypertensive gastropathy in 51-73% and hyperplastic polyps (HPs) in 0.9-2%. Recent studies have shown that HPs found in PH patients are different from classical HPs. They constitute a new entity called portal hypertensive polyps (PHPs). The main difference between sporadic HPs and PHP is the presence of larger and more numerous vascular capillaries in the lamina propria. The clinical course of PHPs is unknown. Their physiopathology seems different from HPs: the increased congestion caused by higher portal pressure in the stomach may induce capillaries proliferation and neoangiogenesis. PHPs may be responsible for symptoms, such as pyloric obstruction, iron deficiency and anemia. Their prevalence in portal hypertensive and cirrhotic patients is from 1% to 8%. PHPs can be single or numerous, in the antrum or the gastric corpus. Their size ranges from 2 to 3 cm. PHPs seem to disappear or shrink with the treatment of PH. They should be resected in case of symptom and if >10 mm, after Helicobacter pylori eradication if present. However, their recurrence is frequent (40-79%), thus surveillance endoscopy is mandatory, at the same time as esophageal varices.

Tissue acquisition and pancreatic masses: Which needle and which acquisition technique should be used?

Background and study aims Pancreatic cancer represents the fourth most common cause of cancer-related deaths in Western countries and the need of a low-risk investigation to obtain an accurate histopathological diagnosis has become increasingly pressing. Endoscopic ultrasonography (EUS) with fine-needle aspiration (FNA) is the standard method for obtaining samples from pancreatic masses. In recent years, there has been an increasing need to obtain histological specimens during EUS procedures, rather than cytological ones, to guide oncological treatment options, leading to the so-call "FNB concept." Different needles have been developed for fine-needle biopsy (FNB) in recent years, enabling acquisition of larger specimens on which to perform histological and molecular analyses. The aim of this narrative review was to assess the role of EUS-guided FNA and FNB in patients with pancreatic masses, and to identify which needle and which acquisition technique should be used to improve tissue acquisition.

Estimating and mapping the incidence of giardiasis in Colombia, 2009-2013.

BACKGROUND: Giardiasis is one of the most common intestinal infections in the world. There have been no national studies on the morbidity of giardiasis in Colombia. In this study, incidence rates of giardiasis were estimated for the years 2009-2013. METHODS: An observational, retrospective study of the giardiasis incidence in Colombia, 2009-2013, was performed using data extracted from the personal health records system (Registro Individual de Prestación de Servicios, RIPS). Official population estimates from the National Department of Statistics (DANE) were used for the estimation of crude and adjusted incidence rates (cases/100 000 population). RESULTS: During the period studied, 15 851 cases were reported (median 3233/year; 5-year cumulated crude national rate of 33.97 cases/100 000 population). Of these, 50.3% were female; 58.4% were <10 years old and 14.8% were 10-19 years old. By region, 17.7% were from Bogotá (10.07 cases/100 000 population, 2009), 10.9% from Antioquia (9.42, 2009), 8.6% from Atlántico (15.67, 2009), and 6.5% from Risaralda (33.38, 2009). Cases were reported in all departments (even insular areas). CONCLUSIONS: As giardiasis is neglected in many countries, surveillance is not regularly undertaken. Despite its limitations, this study is the first attempt to provide estimates of national giardiasis incidence with consistent findings regarding affected age groups and geographical distribution.

[Risk factors for hyperechogenic páncreas in ecoendoscopy: study of cases and controls]. / Factores de riesgo para páncreas hiperecogénico en ecoendoscopía: estudio de casos y controles.

OBJECTIVE: To identify through ecoendoscopy (EE) hyperecogenic pancreas and to determinate risk factors for it in a sample of patients evaluated between June 2005 and May 2010. MATERIAL AND METHODS: Cases and controls study, retrospective observational study, in a population of 5,495 patients; from them 989 were selected as cases (with an increase of partial or global ecogenicity of the pancreas) and 642 controls (with a normal pancreatic ecopattern). Demographical, clinical and ecoendoscopical variables from both groups were compared; OR were calculated with their 95%CI, after bivariate and multivariate risk factors analyses. RESULTS: In the studied population, identified risk factors, mostly associated at the multivariate analyses, included: liver steatosis (OR=29.581; 95%CI 17.942-48.770), mixed hepatopathy (OR=10.724; 95%CI 1.634-70.378), hypothyroidism (OR=8.381; 95%CI 2.067-33.977) and smoking (OR=2.790; 95%CI 1.036-7.515). Other factors were: chronic hepatopathy, family history of diabetes mellitus and high blood pressure, age and body mass index. CONCLUSIONS: There are few studies regard the identification of risk factors for pancreatic steatosis using EE. Current findings are similar with others recently reported in other countries, where liver steatosis is a predictor to find hyperecogenic pancreas at the EE (OR=29). However, this study found an association two-fold higher than that previously reported. In addition, is clear that in this study there are multiple factors associated with the finding of hyperecogenic pancreas that should be considered.

Factores de riesgo para páncreas hiperecogénico en ecoendoscopía: estudio de casos y controles / Risk factors for hipoerecogenic páncreas in ecoendoscopy: study of cases and controls

Objetivo: Identificar con ecoendoscopía (EE) páncreas hiperecogénico y determinar factores de riesgo para el mismo en una muestra de pacientes evaluados entre Junio 2005-Mayo 2010. Material y métodos: Estudio de casos y controles, retrospectivo, en una población de 5495 pacientes evaluados, de los cuales se seleccionaron 989 como casos (con un aumento de ecogenicidad parcial o global del páncreas) y 642 controles (con ecopatrón pancreático normal). Se compararon variables demográficas, clínicas y ecoendoscópicas entre ambos grupos de estudios y se calcularon OR y sus correspondiente IC95% después de realizar análisis bivariado y multivariado de los factores de riesgo. Resultados: En la población evaluada, los factores de riesgo identificados con mayor fuerza de asociación en el análisis multivariado fueron esteatosis hepática (OR=29,581; IC95% 17,942-48,770), hepatopatía mixta (OR=10,724; IC95% 1,634-70,378), hipotiroidismo (OR=8,381; IC95% 2,067-33,977) y tabaquismo (OR=2,790; IC95% 1,036-7,515). Otros factores asociados en menor magnitud fueron: hepatopatía crónica, antecedentes familiares de diabetes mellitus e hipertensión arterial, edad e índice de masa corporal. Conclusiones: Existen escasos estudios que hayan identificado factores de riesgo para esteatosis pancreática empleando EE. Los hallazgos encontrados concuerdan con lo reportado recientemente en otros estudios internacionales donde la esteatosis hepática fue el predictor de mayor fuerza para encontrar en la EE páncreas hiperecogénico (OR=29). Sin embargo, el presente estudio encontró una asociación dos veces mayor a la previamente reportada. En adición a ello se observa claramente que en el presente estudio existen múltiples factores asociados al hallazgo de páncreas hiperecogénico que deben ser tomados en cuenta.

Objective: To identify through ecoendoscopy (EE) hyperecogenic pancreas and to determinate risk factors for it in a sample of patients evaluated between June 2005 and May 2010. Material and methods: Cases and controls study, retrospective observational study, in a population of 5,495 patients; from them 989 were selected as cases (with an increase of partial or global ecogenicity of the pancreas) and 642 controls (with a normal pancreatic ecopattern). Demographical, clinical and ecoendoscopical variables from both groups were compared; OR were calculated with their 95%CI, after bivariate and multivariate risk factors analyses. Results: In the studied population, identified risk factors, mostly associated at the multivariate analyses, included: liver steatosis (OR=29.581; 95%CI 17.942-48.770), mixed hepatopathy (OR=10.724; 95%CI 1.63470.378), hypothyroidism (OR=8.381; 95%CI 2.067-33.977) and smoking (OR=2.790; 95%CI 1.036-7.515). Other factors were: chronic hepatopathy, family history of diabetes mellitus and high blood pressure, age and body mass index. Conclusions: There are few studies regard the identification of risk factors for pancreatic steatosis using EE. Current findings are similar with others recently reported in other countries, where liver steatosis is a predictor to find hyperecogenic pancreas at the EE (OR=29). However, this study found an association two-fold higher than that previously reported. In addition, is clear that in this study there are multiple factors associated with the finding of hyperecogenic pancreas that should be considered.

Carcinoma papilar de tiroides y pancreatitis autoinmune: a propósito de un caso / Thyroid Papillary Carcinoma and Autoimmune Pancreatitis: A case study

El objetivo de este caso es resaltar la utilidad del ultrasonido endoscópico en pacientes con trastornos gastrointestinales. Este caso es interesante en vista que involucra dos patologías que no tienen relación entre si y que se diagnosticaron por ultrasonido endoscópico en una misma paciente, hablamos de la pancreatitis inmunológica y del carcinoma papilar de tiroides. El carcinoma papilar de tiroides se presenta en el 80 % de los casos de pacientes con neoplasia endocrina afectando a mujeres blancas, con una sobrevida mayor al 90 % si se diagnostica en estadios tempranos. En los últimos años se han descrito, cada vez con mayor frecuencia, enfermedades inflamatorias pancreáticas provocadas por mecanismos inmunológicos, que responden a tratamiento con esteroides. La disponibilidad de herramientas diagnósticas basadas en la imagen, la histología y la serología establecidas en los últimos años sirvió para determinar con exactitud la etiología de estas enfermedades.Se presenta el caso de femenina de 48 años, diabética tipo II, en tratamiento regular, cuyo motivo de consulta fue dolor abdominal difuso, gases y distensión abdominal. Se le realizó ecoendoscopia superior que concluyó lesión neoproliferativa de la cola del páncreas y aumento de volumen del lóbulo tiroideo derecho. La punción aspiración por ecoendoscopia de lesión en cola de páncreas reportó células acinares dispersas y dispuestas en grupos entremezclados con exudado inflamatorio mixto a predominio de linfocitos típicos y reactivos, histiocitos, compatibles con pancreatitis autoinmune y la punción aspiración de tiroides reportó células foliculares dispuestas en placas y papilas con atipias nucleares, abundante citoplasma denso, agrandamiento nuclear con anisonucleosis moderada, aclaramiento cromatínico con micro nucléolos, numerosas hendiduras y pseudoinclusiones nucleares concluyendo carcinoma papilar. También se le realizó determinación de IgG4 que resultó positiva...

The objective of this work is the importance of using endoscopic ultrasound in patients with gastrointestinal disorders; this case is interesting given that it involves two unrelated pathologies, which were diagnosed by endoscopic ultrasound in a same patient. We talk about the immunological Pancreatitis and Papillary Carcinoma of Thyroid. The Papillary Carcinoma of Thyroid is the Endocrine Neoplasm that occurs in 80 % cases, affecting white women, with one survival rate greater than 90 %, if diagnosed in early stages. In recent years more and more frequently pancreatic inflammatory diseases caused by immunological mechanisms, which respond to treatment with steroids have been described. The availability of diagnostic tools based on the image, the histology and serology, established in recent years, served to determine accurately the etiology of these diseases. The case of female 48 years, diabetic type II, under regular treatment, whose reason for consultation was: the presence of diffuse abdominal pain, gas, as well as positive abdominal distension. The patient underwent upper digestive ecoendoscopy. It concludes: pancreas´s tail neoproliferative lesion, as well as, and increase in volume of the right thyroid lobe, etiology to be clarify. FNA of the lesion of the tail of the pancreas reported acinar, scattered cells, arranged in groups intermingled with mixed inflammatory exudate, with predominance of typical and reactive lymphocytes, histiocytes, consistent with Immunological Pancreatitis. FNA of thyroid reported groups of follicular cells arranged in plates and papillae with nuclear atypias, abundant dense cytoplasm, and nuclear enlargement with moderate anisonucleosis, chromatinic, with micronucleus, numerous cracks and nuclear pseudo inclusions, which concludes Thyroid Papillary Carcinoma. Also it was done Ig4, proving positive. The patient underwent surgery of the thyroid, currently responding well to medical treatment.

Punción aspiración de páncreas por ecoendoscópia: nuestra experiencia y concordancia de la asistencia por citopatólogo / Pancreatic endoscopic ultrasound: guided aspiration our experience and assistance for matching cytopathologist

La punción aspiración por aguja fina guiada por ultrasonido endoscópico es un método diagnóstico definitivo de patologías pancreáticas. Nuestro objetivo fue realizar revisión de las indicaciones, técnica y resultados de las punciones de páncreas y calcular el índice de concordancia entre diagnósticos preliminares en sala y la citohistología definitiva. Metodo: Se incluyeron las punciones pancreáticas realizadas desde Abril 2009-2011, se vaciaron las indicaciones, sitio de abordaje, aguja utilizada, número de pases, resultados preliminares y resultados citohistológicos definitivos y se estimó el índice de concordancia. Resultados: Se incluyeron 179 punciones, edad promedio de los pacientes 59,39 años; 55% masculinos, 45% femeninos, cuyas indicaciones fueron Lesión neoproliferativa en 67%, lesión quística 12%, pancreatopatía 14%, hiperplasia papilar 7%. El abordaje fue duodenal en 52%, gástrico 48%; se utilizó agujas 22G en 83%, 25G en 17%. No hubo asistencia en 6%. Se reportó resultado preliminar en 95% de los pacientes, con ellos se calculó el índice Kappa obteniéndose un valor de 0,791 reportándose una fuerza de concordancia buena. Conclusión: La punción es una excelente herramienta para obtener de forma poco invasiva la citohistología del páncreas y con un buen intervalo de coincidencia entre el diagnóstico inicial y final si tenemos citopatólogo en la sala.

The fine needle aspiration cytology guided by endoscopic ultrasound is a method of definitive diagnosis of pancreatic diseases. Our objective was to review the indications, technique and results of the pancreatic punctures and calculate the index of agreement between the preliminary diagnoses in the room and the final cytohistologic report. Method: Were included the total of pancreatic punctures performed from April 2009-2011. The indications, the puncture site, needle used, number of passes, preliminary results and final results cytohistologic parameters and estimated concordance index, were emptied in a table. Results: We included 179 punctures, mean age of patients 59.39 years, 55% male, 45% female, whose indications were tumor in 67%, cystic lesion 12%, inflammatory disease 14%, papillary hyperplasia7%. The approach was duodenal in 52%, gastric 48%, 22G needle was used in 83%, 25G at 17%. There was no attendance by 6%. Preliminary result was reported in 95% of patients, we calculated the Kappa index of 0.791 obtaining a value to be reported a good strength of agreement. Conclusion: The puncture is an excellent tool for minimally invasive form of cytohistology of the pancreas that has a good range of overlap between the initial and final diagnosis if cytopathologist is in the room.

Neoplasia neuroendocrina quística múltiple: a propósito de un caso / Multiple cystic neuroendocrine neoplasm: a purpose of a case

Los tumores neuroendocrinos, independientemente del tipo de hormona que produzcan, tienen igual potencial de transformación quística. Presentamos el caso de femenino de 15 años quien presentó hace 3 años parotiditis acompañado de dolor en hemiabdomen superior y vómitos. Se realizaron estudios que diagnostican pancreatitis aguda y tomografía abdominal con evidencia de 3 lesiones ubicadas en el páncreas planteándose el diagnóstico de lesión neuroendocrina. La Gastrina en dos ocasiones reportó valores elevados de 970ng/L y 1313ng/L, es tratada con inhibidores de bomba de protones 40mg BID mejorando parcialmente los síntomas. La paciente no acudió a sus controles regulares por consulta en un lapso de 2 años. En abril de este año se realizó Ecoendoscopia superior por presentar nuevamente los mismos síntomas y se evidenció en el páncreas 5 lesiones que por las características mixtas con estructuras internas micro quístico sugieren Lesiones neuroendocrinas. Se realizó punción aspiración guiada por ecoendoscopia de 3 de las lesiones observando células epiteliales neoplásicas, sugestivos de tumores neuroendocrinos bien diferenciados. La Inmunohistoquimica reportó positiva para cromogranina, sinaptofisina y enolasa neuronal específica. Actualmente la paciente está en plan para cirugía

Neuroendocrine tumors, regardless of the type of hormone produced, have potential as cystic transformation. The case of women who presented 15 years ago 3 years accompanied mumps upper abdomen pain and vomiting. Studies were conducted to diagnose acute pancreatitis and abdominal CT with evidence of 3 lesions located one in the pancreas tail and one in considering the diagnosis of neuroendocrine injury. Gastrin twice the reported high levels of 970ng/L and 1313ng/L, is treated with proton pump inhibitors 40mg BID partially improve the symptoms. The patient did not attend regular checkups for consultation over a period of 2 years. In April this year was higher Ecoendoscopy to resubmit the same symptoms and showed 5 lesions in the pancreas of mixed characteristics internal structure micro cystic lesions suggestive of neuroendocrine. We performed EUS-guided aspiration of 3 lesions observed neoplastic epithelial cells, suggesting well-differentiated neuroendocrine tumors. The reported Immunohistochemistry positive for chromogranin, synaptophysin and neuron-specific enolase. Currently the patient is in surgical plan

Tumor quístico por Actynomises diagnosticado por punción aspiración por ecoendoscopia: a proposito de un caso / Cystic tumor by Actynomises diagnosed by aspiration puncture endoscopy ultrasound: a purpose of a case

El actynomices es una enfermedad que se presenta pocas veces a nivel abdominal. Caracterizado por la formación de múltiples abscesos, con producción de granulaciones y abundante tejido fibrótico. Se describe el caso de masculino de 70 años quien presento fiebre 39c, dolor en epigastrio y lumbalgia. En exámenes de laboratorio se evidencio leucocitosis 15000, ecosonograma abdominal que concluye quiste complejo en la cabeza del páncreas y en la tomografía abdominal lesión de ocupación de espacio sólida en la transcavidad de los epiplones concluyendo tumor retroperitoneal. Se le realizó ultrasonido endoscópico encontrando lesión de aproximadamente entre 8 y 10cm, tipo quística abscedada menos probable tumor mesenquimático abscedado. Se realizó punción aspiración guiada por eco endoscopia obteniendo abundante celularidad, con denso exudado inflamatorio de polimorfonucleares neutrófilos, histiocitos, linfocitos y plasmocitos. También agregados bacterianos filamentosos, basófilos a la Hematoxilina- Eosina, que sugieren la presencia de Actynomises. Se le realizó colonoscopia encontrando en colon transverso cuerpo extraño (espina de pescado), coincidiendo con la ubicación del absceso planteándose la posibilidad causa-efecto, se extrae y se coloca ampicilina-sulbactam por 14 días, antiinflamatorio no esteroideos, con la consecuente resolución del absceso. Actual-mente el paciente se encuentra en buenas condiciones después de 8 meses de haber sido tratado

The Actinomyses is a disease that rarely occurs at the abdominal level. Characterized by the formation of multiple abscesses, with abundant production of grains and fibrotic tissue. We describe the case of 70 year male who had fever 39 c, epigastric pain and back pain. In laboratory tests evidenced leukocytosis 15000, ending abdominal ultrasound cyst complex in the pancreatic head and abdominal CT in the space-occupying lesion in solid lesser sac ending retroperitoneal tumor. He underwent endoscopic ultrasound finding injury approximately 8 to 10 cm, cystic type abscessed abscessed mesenchymal tumor less likely. Guided aspiration was performed by echo endoscopy obtaining abundant cellularity with dense inflammatory exudate of neutrophils, histiocytes, lymphocytes and plasma cells. Also added filamentous bacterial cells, basophils to hematoxylin-eosin, suggesting the presence of Actynomises. Colonoscopy was performed in the transverse colon found foreign body (fish bone), coinciding with the location of the abscess considering the possibility of cause and effect, is removed and placed ampicillin-sulbactam for 14 days, non-steroidal anti-inflammatory, with the resulting resolution abscess. Currently the patient is in good condition after 8 months of being treated