Electroporación irreversible: ampliando las fronteras de la ablación / Irreversible electroporation: Beyond the limits of tumor ablation

La electroporación irreversible o IRE (irreversible electroporation) es una técnica de ablación tumoral no térmica basada en la aplicación de pulsos eléctricos de alto voltaje entre pares de agujas insertadas alrededor de un tumor. La corriente generada favorece la creación de nanoporos en la membrana plasmática, desencadenando la apoptosis. Por ello, la IRE puede utilizarse de manera segura en localizaciones cercanas a estructuras vasculares delicadas, contraindicadas para el resto de técnicas termoablativas. Actualmente la IRE se emplea con éxito para la ablación de tumores en páncreas, riñón e hígado y, de manera muy extendida, como opción terapéutica focal para el cáncer de próstata. La necesidad de un manejo anestésico específico y la colocación precisa y en paralelo de múltiples agujas implican un alto nivel de complejidad, siendo necesaria una gran experiencia del equipo intervencionista. No obstante, se trata de una técnica muy prometedora con una gran capacidad inmunológica sistémica que puede provocar un efecto a distancia del tumor tratado (efecto abscopal).(AU)

Irreversible electroporation (IRE) is a non-thermal tumor ablation technique. High-voltage electrical pulses are applied between pairs of electrodes inserted around and/or inside a tumor. The generated electric current induces the creation of nanopores in the cell membrane, triggering apoptosis. As a result, IRE can be safely used in areas near delicate vascular structures where other thermal ablation methods are contraindicated. Currently, IRE has demonstrated to be a successful ablation technique for pancreatic, renal, and liver tumors and is widely used as a focal therapeutic option for prostate cancer. The need for specific anesthetic management and accurate parallel placement of multiple electrodes entails a high level of complexity and great expertise from the interventional team is required. Nevertheless, IRE is a very promising technique with a remarkable systemic immunological capability and may impact on distant metastases (abscopal effect).(AU)

Irreversible electroporation: Beyond the limits of tumor ablation.

Irreversible Electroporation (IRE) is a non-thermal tumor ablation technique. High-voltage electrical pulses are applied between pairs of electrodes inserted around and/or inside a tumor. The generated electric current induces the creation of nanopores in the cell membrane, triggering apoptosis. As a result, IRE can be safely used in areas near delicate vascular structures where other thermal ablation methods are contraindicated. Currently, IRE has demonstrated to be a successful ablation technique for pancreatic, renal, and liver tumors and is widely used as a focal therapeutic option for prostate cancer. The need for specific anesthetic management and accurate parallel placement of multiple electrodes entails a high level of complexity and great expertise from the interventional team is required. Nevertheless, IRE is a very promising technique with a remarkable systemic immunological capability and may impact on distant metastases (abscopal effect).

Fístula pancreática: una complicación temida. Experiencia en una unidad de cirugía hepatobiliopancreática de cuarto nivel / Pancreatic fistula: A feared complication. Experience in a fourth level hepatobiliopancreatic surgery unit

Introducción. La fístula pancreática postoperatoria es una de las complicaciones más importantes en la cirugía hepatobiliopancreática. Su diagnóstico se hace mediante la presencia de un nivel de amilasa en el líquido de drenaje al menos tres veces por encima del valor de la amilasa en suero a partir del tercer día postoperatorio. El objetivo de este estudio fue caracterizar los pacientes con fístula pancreática postoperatoria en nuestra institución, evaluando la importancia de la detección temprana y el establecimiento de un manejo oportuno. Métodos. Estudio descriptivo, retrospectivo, que incluyó los pacientes sometidos a pancreatoduodenectomía, con diagnóstico de fístula pancreática postoperatoria como complicación de cirugía hepatobiliopancreática, en el Hospital Internacional de Colombia, en Piedecuesta, entre enero del 2017 y diciembre de 2020. Se excluyeron los pacientes con otro tipo procedimiento quirúrgico y aquellos que decidieron no participar en el estudio. Resultados. Se evaluaron 69 pacientes, con un predominio del sexo femenino (n=38; 55,1 %) y mediana de la edad de 57 años. El 33,3 % (n=24) de los pacientes intervenidos desarrollaron fístula pancreática postoperatoria, siendo el 23,2 % fuga bioquímica, grado B 8,7 % y grado C 2,9 %, para quienes se indicaron manejo expectante, control ecográfico y reintervención, respectivamente. Fallecieron 5 pacientes (7,2 %). Conclusiones. La fístula pancreáticapostoperatoria es una complicación para tener en cuenta en todos los pacientes sometidos a pancreatoduodenectomía. Existen estrategias que pueden permitir disminuir la incidencia de esta complicación, con el fin de mejorar el desenlace, el pronóstico y la morbilidad posquirúrgica.

Introduction. Postoperative pancreatic fistula is one of the most important complications in hepatobiliopancreatic surgery. Its diagnosis is made by the presence of an amylase level in the drainage fluid at least three times above the serum amylase value from the third postoperative day. The objective of this study was to characterize patients with postoperative pancreatic fistula at our institution, evaluating the importance of early detection and to establish a timely management. Methods. Descriptive, retrospective study that included patients who underwent pancreatoduodenectomy with a diagnosis of postoperative pancreatic fistula as a complication of hepatobiliopancreatic surgery at the Hospital Internacional Colombia, between January 2017 and December 2020. Patients with another type of procedure performed by this specialty and those who did not decide to participate in the study were excluded. Results. A total of 69 patients were included, the median age was 57 years with a predominance of females (n=38; 55.1%). 33.3% (n=24) of the operated patients developed postoperative pancreatic fistula, with 23.2% having a biochemical leak, grade B in 8.7% and grade C in 2.9%, for whom expectant management, ultrasound control and reintervention were indicated, respectively. Five patients died (7.2%). Conclusions. Pancreatic fistula is a complication to take into account in all patients undergoing pancreatoduodenectomy. There are strategies that can reduce the incidence of this complication and thus improve not only the outcome but also the prognosis and postoperative morbidity.

Complicaciones de cirugía de Whipple en un paciente pediátrico con tumor pseudopapilar de páncreas / Complications of Whipple procedure in a pediatric patient with pseudopapillary tumor of the pancreas

Las neoplasias de páncreas son una entidad poco frecuente en pediatría; el tumor pseudopapilar de páncreas (TSP) es el más comúnmente diagnosticado. Habitualmente, se localizan en la cabeza del páncreas. La cirugía de Whipple o pancreatoduodenectomía es la técnica elegida para el tratamiento de los tumores benignos o malignos de páncreas. Si bien la mortalidad conocida ha descendido en los últimos años, debido a la mayor experiencia de los cirujanos y al mejor cuidado pre- y posoperatorio, la morbilidad se ha mantenido elevada secundaria a las complicaciones asociadas. Dentro de estas se destacan retardo en el vaciamiento gástrico, colecciones intraabdominales, fístula pancreática, reestenosis del sitio quirúrgico y hemorragia pospancreatectomía. Se presenta el caso clínico de una niña de 13 años con diagnóstico de TSP que recibió tratamiento quirúrgico efectivo desde el punto de vista oncológico, pero que requirió una internación prolongada secundaria a las complicaciones quirúrgicas.

Pancreatic neoplasms are rare in pediatrics; the pseudopapillary tumor (PPT) of the pancreas is the most common. PPTs of the pancreas are usually located in the head of the pancreas. A pancreaticoduodenectomy or Whipple procedure is the technique of choice for the treatment of benign or malignant pancreatic tumors. Although mortality for this cause has decreased in recent years, due to the greater experience of surgeons and improved pre- and postoperative care, morbidity has remained high secondary to associated complications. These include delayed gastric emptying, intra-abdominal collections, pancreatic fistula, surgical site restenosis, and post-pancreatectomy hemorrhage. Here we describe the clinical case of a 13-year-old girl diagnosed with PPT of the pancreas who underwent an effective surgery in terms of cancer treatment, but who required a prolonged hospitalization secondary to surgical complications.

Endoscopic ultrasound-guided celiac plexus neurolysis in pancreatic cancer-associated pain: different technical approaches in three challenging cases

Abdominal pain is severe in the vast majority of patients with pancreatic cancer. In some cases, chronic use of analgesics markedly reduces quality of life due to side effects. Endoscopic ultrasound-guided celiac plexus neurolysis is a procedure that controls cancerassociated pain in this population and consists of injecting a neurolytic agent around or within the celiac plexus. In this report, we present three cases with different technical approaches for celiac plexus neurolysis.

El cáncer de páncreas se puede presentar con dolor abdominal intenso, siendo necesario el uso de analgésicos a largo plazo en muchos de los pacientes. Sin embargo, estos medicamentos pueden tener efectos adversos que finalmente reducen la calidad de vida de los pacientes. La neurólisis del plexo celíaco guiada por ecoendoscopia es un procedimiento que controla el dolor asociado a este tipo de neoplasia y consiste en inyectar un agente neurolítico en o alrededor del plexo celíaco. Presentamos tres casos en los cuales se realizan diferentes técnicas de abordaje terapéutico.

Metástasis Pancreática Metacrónica de un Carcinoma de Células Renales. Reporte de un Caso / Metachronic Pancreatic Metastasis of a Renal Cell Carcinoma. Case Report

El carcinoma de células renales (CCR) a nivel mundial presenta una incidencia de 431.288 casos anuales, causando 179.368 muertes en 2020. Sin embargo, a pesar de su incidencia, el desarrollo de metástasis pancreática (MP) de un RCC es un hecho inusual. El objetivo de este manuscrito fue reportar el caso de una paciente con una MP metacrónica de un CCR. Se trata de una paciente de 56 años, sexo femenino, nefrectomizada derecha hace 132 meses por un CCR, en adyuvancia con inmunoterapia. En un control imagenológico de rutina, se le pesquisó una lesión de aspecto tumoral en el cuerpo y cola del páncreas. Se intervino quirúrgicamente, realizándose una pancreatectomía córporo-caudal con preservación esplénica. Evolucionó de forma satisfactoria, sin complicaciones, siendo dada de alta al 4º día de su cirugía. El informe del estudio de la pieza operatoria con estudio inmunohistoquímico concluyó que se trataba de una MP de CCR. La paciente se encuentra en buenas condiciones generales y reinició quimioterapia con anticuerpos monoclonales. El seguimiento frecuente y prolongado de pacientes con antecedentes de CCR, facilita un diagnóstico y tratamiento oportuno de MP facilitando el mejor pronóstico de los pacientes, con tasas más altas de supervivencia.

SUMMARY: Renal cell carcinoma (RCC) worldwide has an incidence of 431,288 cases per year, causing 179,368 deaths in 2020. However, despite its incidence, the development of pancreatic metastasis (MP) from RCC is unusual. The aim of this manuscript was to report the case of a patient with a PM of a RCC. This is a 56-year-old female patient, underwent right nephrectomy 132 months earlier for RCC. While she was in adjuvant immunotherapy, in a routine imaging control, it was found a tumor lesion in the body and the tail of the pancreas. So, she underwent surgery, performing a corpora-caudal pancreatectomy with splenic preservation. Postoperative evolution was correct, without complications, and she was discharged on the 4th day after surgery. The report of the study of the surgical piece with an immunohistochemical study included, conclusive of PM of RCC. Currently, the patient is in good general condition and restarted chemotherapy with monoclonal antibodies. Frequent and prolonged follow-up of patients with a history of RCC facilitates timely diag- nosis and treatment of PM, facilitating the best prognosis for patients, with higher survival rates.

Fases del desarrollo de biomarcadores para la detección temprana del cáncer / Phases of the development of biomarkers for early detection of cancer

Introducción. Un biomarcador se define como una alteración molecular presente en el desarrollo de la patogénesis del cáncer, que puede ser utilizada para el diagnóstico temprano de la enfermedad. La medición del biomarcador se hace por medio de diversas técnicas, como bioquímica, inmunohistoquímica o biología molecular, en diferentes tipos de muestras, como tejido, sangre periférica y orina. El biomarcador ideal será aquel que sea válido y específico a la vez, que sea no invasivo, barato y fácilmente detectable. El uso de biomarcadores para la detección temprana del cáncer debe seguir un desarrollo ordenado y sistemático antes de introducirlos en la práctica clínica. Métodos. Se realizó una búsqueda exhaustiva en las bases de datos de PubMed y Embase, seleccionando los artículos pertinentes para revisarlos acorde a la temática específica de interés. Resultados. Se propone la sistematización del desarrollo de biomarcadores en cinco grandes fases, las cuales tienen la característica de ser ordenadas desde las evidencias más tempranas hasta las fases finales de su estudio. Conclusiones. El correcto desarrollo de biomarcadores hace posible la introducción de intervenciones terapéuticas en el ámbito de la prevención secundaria del cáncer.

Introduction. A biomarker can be defined as a molecular alteration present in the development of cancer pathogenesis which can be used for early diagnosis of the disease. The measurement of the biomarker can be carried out through various techniques such as biochemistry, immunohistochemistry, molecular biology, in different types of samples such as tissue, peripheral blood, and urine. The ideal biomarker will be one that is valid and specific while is non-invasive, cheap, and easily detectable. The use of biomarkers for the early detection of cancer must follow an orderly and systematic development before introducing them into clinical practice. Methods. An exhaustive search was performed in PubMed and Embase databases, selecting the relevant articles according to the specific topic of interest. Results. Systematization of the development of biomarkers in five large phases is proposed, which has the characteristic of being ordered from the earliest evidence to the final phases of their study. Conclusions. The correct development of biomarkers makes possible the introduction of therapeutic interventions in the field of secondary prevention of cancer.

Síndrome colestásico como forma de presentación de linfoma no Hodgkin. Reporte de un caso pediátrico / Cholestatic syndrome as a presentation of non-Hodgkin lymphoma. A pediatric case report

La ictericia colestásica se debe a la alteración de la secreción de bilirrubina conjugada; es una de las posibles causas la alteración del flujo biliar por obstrucción de la vía biliar extrahepática. El linfoma es la tercera neoplasia más frecuente en pediatría, mientras que los tumores pancreáticos son poco frecuentes y, en su mayoría, lesiones benignas. Las manifestaciones clínicas de los tumores de localización retroperitoneal son poco específicas y suelen ser tardías, por lo que la sospecha clínica debe ser alta. El objetivo del siguiente trabajo es presentar el caso de un niño de 7 años con síndrome colestásico en el que se halló un tumor en la cabeza del páncreas que comprimía la vía biliar extrahepática. El diagnóstico del tumor fue linfoma no Hodgkin (LNH). Se destaca la infrecuencia de este tumor en esta localización en la edad pediátrica

Cholestatic jaundice is due to an alteration in conjugated bilirubin secretion; a possible cause is an altered bile flow resulting from an obstruction of the extrahepatic bile duct. A lymphoma is the third most common neoplasm in pediatrics, while pancreatic tumors are rare and mostly benign. The clinical manifestations of retroperitoneal tumors are not very specific and are usually late, so a high level of clinical suspicion is required. The objective of this study is to describe the case of a 7-year-old boy with cholestatic syndrome with a tumor in the head of the pancreas compressing the extrahepatic bile duct. The tumor diagnosis was non-Hodgkin lymphoma (NHL). It is worth noting that the presence of a tumor in this location in pediatric age is uncommon

Lower gastrointestinal bleeding due to pancreatic cancer: an unusual presentation

Pancreatic cancer is a malignant neoplasm with a poor prognosis. When it manifests clinically with cold jaundice, general repercussion or dyspepsia, it usually corresponds to a locally advanced tumor. Enterorrhagia as a form of presentation of pancreatic cancer is extremely infrequent; it corresponds to a severe form with an ominous prognosis. We present the case of a 61-year-old man who attended emergency service for enterorrhagia associated with organic abdominal pain and general repercussions, to whom a diagnosis of pancreatic tail cancer was diagnosed. Colonoscopy revealed mucosal infiltration with intense edema, erythema, necrosis, and spontaneous bleeding at the level of the splenic exure of the colon. Histology conrmed colonic infiltration by pancreatic neoplasm. Computed tomography allowed staging in stage IV. Palliative surgical treatment was performed, with a survival of 3 months.

El cáncer de páncreas corresponde a una neoplasia maligna con pobre pronóstico. Cuando se manifiesta clínicamente con ictericia fría, repercusión general o dispepsia, habitualmente corresponde a un tumor localmente avanzado. La enterorragia como forma de presentación del cáncer de páncreas es extremadamente infrecuente, corresponde a una forma grave y de pronóstico ominoso. Se presenta el caso de un hombre de 61 años que consultó por enterorragia asociada a dolor abdominal de características orgánicas y repercusión general, en el que se realizó diagnóstico de cáncer de cola de páncreas. La colonoscopía evidenció a nivel del ángulo esplénico del colon, infiltración mucosa con intenso edema, eritema, necrosis y sangrado espontáneo. La histología confirmó la infiltración colónica por neoplasma de páncreas. La tomografía computarizada permitió su estadificación en estadio IV. Se realizó tratamiento quirúrgico paliativo, con una sobrevida de 3 meses.

Papel da imagem na indicação da eletroporação irreversível no manejo terapêutico do adenocarcinoma de pâncreas / Role of imaging in the applicability of irreversible electroporation for the management of pancreatic adenocarcinoma

Resumo O adenocarcinoma ductal de pâncreas é uma das neoplasias malignas mais agressivas, com taxas de sobrevivência anuais inferiores a 20%. Os métodos axiais (tomografia computadorizada e ressonância magnética) têm papel fundamental no diagnóstico e estadiamento da doença, por fornecerem adequada resolução anatômica na avaliação de estruturas-chave, principalmente vasculares. O adenocarcinoma ductal de pâncreas é frequentemente descoberto em estágios avançados e sem viabilidade de ressecção cirúrgica, e nesse cenário o desenvolvimento de alternativas terapêuticas minimamente invasivas tem sido ainda mais importante para a mudança de sua história natural. A eletroporação irreversível, procedimento intervencionista que minimiza efeitos deletérios nos tecidos adjacentes, vem se destacando no tratamento de lesões tradicionalmente consideradas irressecáveis. Essa técnica, apesar de ganhar cada vez mais espaço no manejo terapêutico do adenocarcinoma ductal de pâncreas, ainda é pouco familiar aos radiologistas. Neste estudo, buscamos expor, de forma sucinta e didática, os fundamentos da técnica, as principais características de imagem e os critérios de elegibilidade que devem ser considerados para indicação da eletroporação irreversível nessa doença.

Abstract Pancreatic ductal adenocarcinoma is one of the most aggressive malignant neoplasms, with a one-year survival rate below 20%. Axial methods (computed tomography and magnetic resonance imaging) play a fundamental role in the diagnosis and staging of the disease, because they provide adequate anatomical resolution in the assessment of key structures, mainly vascular structures. Pancreatic ductal adenocarcinoma is most often discovered in advanced stages, when surgical resection is no longer feasible. In that scenario, minimally invasive treatment alternatives have been developed in attempts to change the natural history of the disease. Irreversible electroporation, an interventional procedure that minimizes deleterious effects on adjacent tissues, has proven useful for the treatment of tumors traditionally considered unresectable. Despite the growing acknowledgment of this technique as a tool for the management of pancreatic ductal adenocarcinoma, it is still relatively unknown among radiologists. In this study, we sought to provide an overview of the main characteristics and eligibility criteria that must be considered for the indication of irreversible electroporation in cases of pancreatic ductal adenocarcinoma.

Tendências de mortalidade por câncer de pâncreas correlacionadas com o índice de desenvolvimento humano (IDH) no Brasil em 40 anos / Pancreatic cancer mortality trends and correlation with human development index (hdi) in brazil over 40 years

ABSTRACT Background Pancreatic cancer mortality is greater in countries with a high Human Development Index (HDI). This study analyzed pancreatic cancer mortality rates trends, and their correlation with HDI in Brazil over 40 years. Methods: Data on pancreatic cancer mortality in Brazil between 1979 and 2019 were obtained from the Mortality Information System (SIM). Age-standardized mortality rates (ASMR) and Annual Average Percent Change (AAPC) were calculated. Pearson's correlation test was applied to compare mortality rates and HDI for three periods: 1986-1995 was correlated with HDI of 1991, 1996-2005 with HDI of 2000, and 2006-2015 with HDI of 2010; and to the correlation of AAPC versus the percentage change in HDI from 1991 to 2010. Results: A total of 209,425 deaths from pancreatic cancer were reported in Brazil, with an annual increase of 1.5% in men and 1.9% in women. There was an upward trend for mortality in most Brazilian states, with the highest trends observed in the North and Northeast states. A positive correlation between pancreatic mortality and HDI was observed over the three decades (r>0.80, P<0.05) and also between AAPC and HDI improvement by sex (r=0.75 for men and r=0.78 for women, P<0.05). Conclusion There was an upward trend in pancreatic cancer mortality in Brazil for both sexes, but rates among women were higher. Mortality trends were higher in states with a higher percentage improvement in HDI, such as the North and Northeast states.

RESUMO Contexto A mortalidade por câncer de pâncreas é maior em países com alto Índice de Desenvolvimento Humano (IDH). Este estudo analisou as taxas e tendências de mortalidade por câncer de pâncreas e correlacionou-as com o IDH no Brasil no período de 40 anos. Métodos: Os dados sobre mortalidade por câncer de pâncreas no Brasil, entre 1979 e 2019, foram extraídos do Sistema de Informações sobre Mortalidade (SIM). As taxas de mortalidade padronizadas por idade e variação percentual média anual (AAPC) foram calculadas. O teste de correlação de Pearson foi aplicado para comparar as taxas de mortalidade e IDH em três períodos: 1986-1995 foi correlacionado com o IDH de 1991, 1996-2005 com IDH 2000 e 2006-2015 com IDH 2010; e a correlação da AAPC versus o percentual de variação do IDH de 1991 a 2010. Resultados: Foram notificados 209.425 óbitos por câncer de pâncreas no Brasil no período de 1979 a 2019, com aumento de 1,5% ao ano em homens e de 1,9% em mulheres. Houve tendência de aumento da mortalidade na maioria dos estados brasileiros, com maiores tendências nos estados das regiões Norte e Nordeste. Foi observada uma correlação positiva na mortalidade por câncer de pâncreas e o IDH ao longo de três décadas (r>0,80, P<0,05); também, entre o AAPC e o incremento do IHD entre 1991 e 2010 (r=0,75 para homens e r=0,78 para mulheres, P<0,05). Conclusão: Houve tendência crescente da mortalidade por câncer de pâncreas no Brasil, em ambos os sexos, porém maior entre as mulheres. As tendências de mortalidade foram maiores nos estados com maior percentual de incremento do IDH, como estados das regiões Norte e Nordeste.

Cystic pancreatic lesions: imaging versus anatomopathological findings-how to improve diagnostic accuracy? / Lesões císticas do pâncreas: imagens versus achados anatomopatológicos. como melhorar a acurácia diagnóstica?

ABSTRACT BACKGROUND: Pancreatic cystic lesions are a group of pancreatic neoplasms with different behavior and risk of malignancy. Imaging diagnosis and differentiation of these lesions remain a challenge. AIMS: The aim of this study was to evaluate the agreement between computed tomography and/or magnetic resonance imaging and post-operative pathologic diagnoses of Pancreatic cystic lesions in a University Hospital of São Paulo State. METHODS: A total of 39 patients with surgically diagnosed Pancreatic cystic lesions were enrolled, as a study cohort from 2009 to 2019. Preoperative radiological and final pathological diagnosis was correlated to measure computed tomography and/or magnetic resonance imaging diagnostic. Pancreatic adenocarcinoma, choledochal pancreatic cyst, mucinous cystadenoma, serous cystadenoma, intraductal papillary mucinous neoplasms, and pancreatic pseudocyst were classified as neoplastic cysts. RESULTS: It was noted that 27 patients (69.23%) had preoperative computed tomography and magnetic resonance imaging, 11 patients (28.20%) had preoperative computed tomography only, and 1 patient had preoperative magnetic resonance imaging only. The values for diagnoses made only with computed tomography (p=0.47) and from the combination of computed tomography+magnetic resonance imaging (p=0.50) did also point to moderate agreement with the anatomopathological findings. The values pointed to a fair agreement for the diagnosis of mucinous cystadenoma (p=0.3), moderate agreement for intraductal papillary mucinous neoplasms (p= 0.41), good agreement for serous cystadenoma (p=0.79), and excellent agreement for choledochal pancreatic cyst (p=1), pancreatic pseudocyst (p=0.84), and Frantz tumor (p=1) (p<0.05). CONCLUSIONS: The findings of computed tomography and/or magnetic resonance imaging have an equivalent diagnostic agreement with an anatomopathological diagnosis for differentiating benign from malignant Pancreatic cystic lesions and in suggesting a specific diagnosis. There is no statistical difference between the use of computed tomography alone and computed tomography+magnetic resonance imaging in the improvement of diagnostic accuracy.

RESUMO RACIONAL: Lesões císticas pancreáticas são um grupo de neoplasias pancreáticas com diferentes comportamentos e riscos de malignidade. O diagnóstico por imagem e a diferenciação dessas lesões constituem um desafio. OBJETIVOS: Avaliar a concordância entre o diagnóstico de imagem pré operatório obtido através da tomografia computadorizada e/ou da ressonância nuclear magnética e o diagnóstico anátomopatológico das lesões císticas pancreáticas, no Hospital de Base de São José do Rio Preto - SP. MÉTODOS: Trinta e nove pacientes com lesões císticas pancreáticas, comprovados cirurgicamente, foram incluídos para o estudo, de 2009 a 2019. O diagnóstico radiológico pré-operatório e o diagnóstico anatomopatológico final foram correlacionadas para medir a acurácia da tomografia computadorizada e/ou da ressonância nuclear magnética. O adenocarcinoma pancreático, o cisto pancreato-coledociano, o cistoadenoma mucinoso, o cistoadenoma seroso, a neoplasia mucinosa papilar intraductal, e o pseudocisto pancreático foram classificados como cistos neoplásicos. As informações foram comparadas e estatisticamente analisadas. RESULTADOS: Vinte e sete pacientes fizeram tomografia computadorizada e ressonância nuclear magnética pré-operatórios (69,23%), 11 pacientes fizeram apenas tomografia computadorizada (28,20%), e 1 paciente fez apenas ressonância nuclear magnética (2,57%). Os achados de tomografia computadorizada para diagnóstico (p=0,47) e para a combinação tomografia computadorizada+RM (p=0,50) mostraram moderada concordância com os achados anatomopatológicos. Houve leve concordância para o diagnóstico de cistoadenoma mucinoso (p=0,3), moderada concordância para intraductal papillary mucinous neoplasms (p=0,41), boa concordância para cistoadenoma seroso (p=0,79) e excelente concordância para pseudocisto pancreático (p=0,84), cisto pancreato-coledociano (p=1) e tumor de Frantz (p=1) (p<0,05). CONCLUSÕES: Os achados de imagem da tomografia computadorizada e/ou ressonância nuclear magnética apresentaram concordância diagnóstica com os exames anatomopatológicos na diferenciação de lesões císticas pancreáticas benignas e malignas, porém a diferença entre o uso apenas da tomografia computadorizada e tomografia computadorizada+ressonância nuclear magnética na melhora da acurácia diagnóstica não apresentou relevância estatística tal como a literatura.

From left to right. para-aortic lymph nodes sampling during pancreatoduodenectomy for pancreatic cancer / Da esquerda para a direita. ressecção de linfonodos para-aórticos durante duodenopancreatectomia para câncer pancreático

ABSTRACT BACKGROUND: Para-aortic lymph nodes involvement in pancreatic head cancer has been described as an independent adverse prognostic factor. To avoid futile pancreatic resection, we systematically perform para-aortic lymphadenectomy as a first step. AIMS: To describe our technique for para-aortic lymphadenectomy. METHODS: A 77-year-old female patient, with jaundice and resectable pancreatic head adenocarcinoma, underwent pancreaticoduodenectomy associated with infracolic lymphadenectomy. RESULTS: The infracolic anterior technique has two main advantages. It is faster and prevents the formation of postoperative adhesions, which can make subsequent surgical interventions more difficult. CONCLUSIONS: We recommend systematic para-aortic lymphadenectomy as the first step of pancreaticoduodenectomy for pancreatic head adenocarcinoma by this approach.

RESUMO RACIONAL: O envolvimento dos gânglios linfáticos para-aórticos no câncer da cabeça do pâncreas tem sido descrito como um fator prognóstico adverso independente. Para evitar a ressecção pancreática inútil, realizamos sistematicamente linfadenectomia para-aórtica. OBJETIVOS: Descrever a técnica de linfadenectomia para-aórtica. MÉTODOS: Paciente do sexo feminino, 77 anos, com quadro de icterícia e adenocarcinoma da cabeça do pâncreas ressecável, submetida à duodenopancreatectomia associada à linfadenectomia infracólica. RESULTADOS: Esta técnica anterior infracólica tem duas vantagens principais: é mais rápida e evita a formação de aderências pós-operatórias, o que pode dificultar as intervenções cirúrgicas subsequentes. CONCLUSÕES: Recomendamos a linfadenectomia para-aórtica sistemática como o primeiro passo da duodenopancreatectomia para o adenocarcinoma da cabeça do pâncreas por esta abordagem.

Tumores neuroendócrinos pancreáticos: revisão histopatológica / Pancreatic neuroendocrine tumors: histopathological review

Introdução: Os tumores neuroendócrinos pancreáticos são considerados raros. Eles são classificados em funcionantes e não funcionantes. Objetivo: Definir e classificar tumores neuroendócrinos pancreáticos de acordo com sua avaliação histopatológica e imunoistoquímica, associado aos critérios diagnósticos. Método: Trata-se de revisão narrativa sobre publicações encontradas no PubMed, SciELO e Google Acadêmico. Resultados: Esses tumores podem ser bem ou pouco diferenciados e apresentam características microscópicas distintas. As células bem diferenciadas têm formato pequeno, núcleos uniformes redondos ou ovais, citoplasma finamente granular indicando forte capacidade secretória e mantêm a estrutura organoide. A presença de necrose tumoral, atividade mitótica aumentada e índice de Ki-67 elevado indicam alta probabilidade de neoplasia neuroendócrina. Cromogranina A e sinaptofisina favorecem o diagnóstico do bem diferenciado. Já a marcação positiva do BCL 10 em conjunto com a ausência de expressão da cromogranina A e da sinaptofisina mostram a precária diferenciação tumoral. A presença de marcação positiva para as expressões hormonais não define o tumor como funcionante. Conclusão: Houve aumento do diagnóstico de tumores neuroendócrinos pancreáticos com o uso de técnicas de imagem e a conscientização sobre a doença. A análise histopatológica com imunoistoquímica, especialmente quando há sintomas consumptivos, podem indicar o tipo do carcinoma e induzir ao mais adequado tratamento.

Introduction: Pancreatic neuroendocrine tumors are considered rare. They are classified into functioning and non-functioning. Objective: To define and classify pancreatic neuroendocrine tumors according to their histopathological and immunohistochemical evaluation, associated with diagnostic criteria. Method: This is a narrative review of publications found in PubMed, SciELO and Google Scholar. \Results: These tumors can be well or poorly differentiated and have distinct microscopic characteristics. Well-differentiated cells are small in shape, have uniform round or oval nuclei, finely granular cytoplasm indicating strong secretory capacity, and maintain the organoid structure. Presence of tumor necrosis, increased mitotic activity and high Ki-67 index indicate a high probability of neuroendocrine neoplasia. Chromogranin A and synaptophysin favor the diagnosis of well-differentiated. The positive staining of BCL 10 together with the absence of expression of chromogranin A and synaptophysin show poor tumor differentiation. The presence of positive staining for hormone expressions does not define the tumor as functioning. Conclusion: There was an increase in the diagnosis of pancreatic neuroendocrine tumors with the use of imaging techniques and awareness of the disease. Histopathological analysis with immunohistochemistry, especially when there are consuming symptoms, can indicate the type of carcinoma and lead to the most appropriate treatment.

The influence of institutional pancreaticoduodenectomy volume on short-term outcomes in the Brazilian public health system: 2008-2021 / A influência do volume institucional de duodenopancreatectomia nos resultados de curto prazo no sistema público de saúde brasileiro: 2008-2021

ABSTRACT Introduction: pancreaticoduodenectomy is a complex surgical procedure that can result in high rates of complications and morbimortality. Due to its complexity, the establishment of referral centers has increased in recent decades. This study aims to evaluate the influence of the institutional volume of pancreaticoduodenectomy for periampullary cancer on short-term outcomes in the Brazilian public health system. Methods: this study used a population-based approach and investigated the number of pancreaticoduodenectomies performed by institutions within Brazil's public health system between 2008 and 2021. High-volume institutions were defined as those that performed more than two standard deviations above the mean number of procedures per year. Specifically, if a center performed eight or more pancreaticoduodenectomies annually, it was considered a high-volume institution. Results: in Brazil, 283 public hospitals performed pancreaticoduodenectomy for cancer between 2008 and 2021. Only ten hospitals performed at least eight pancreaticoduodenectomies per year, accounting for approximately 3.5% of the institutions. High-volume institutions had a significantly lower in-hospital mortality rate than low-volume institutions (8 vs. 17%). No significant differences between groups were observed for length of stay, hospitalizations using the ICU, and ICU length of stay. The linear regression model showed that the number of hospital admissions for pancreaticoduodenectomy and age were significantly associated with hospital mortality. Conclusion: institutional pancreaticoduodenectomy volume implies a lowering of in-hospital mortality. The findings of this nationwide study can affect how the public health system manages pancreaticoduodenectomy care.

RESUMO Introdução: a duodenopancreatectomia é um procedimento complexo com alta risco de complicações e morbimortalidade. Devido à sua complexidade, a constituição de centros de referência tem aumentado nas últimas décadas. Este estudo tem como objetivo avaliar a influência do volume institucional de duodenopancreatectomia para câncer periampular em resultados de curto prazo no sistema público de saúde brasileiro. Métodos: este estudo utilizou uma abordagem de base populacional e investigou o número de duodenopancreatectomia realizadas por instituições do sistema público de saúde do Brasil entre 2008 e 2021. Definimos instituições de alto volume como aquelas que realizaram mais de dois desvios padrão acima do número médio de procedimentos por ano. Especificamente, um centro seria considerado de alto volume se realizasse oito ou mais duodenopancreatectomias anualmente. Resultados: no Brasil, 283 hospitais públicos realizaram duodenopancreatectomia por câncer entre 2008-2021. Apenas dez hospitais realizaram pelo menos oito duodenopancreatectomias anualmente, correspondendo a aproximadamente 3,5% das instituições. As instituições de alto volume tiveram uma taxa de mortalidade intra-hospitalar significativamente menor do que as instituições de baixo volume (8 vs. 17%). Não foram observadas diferenças significativas entre os grupos quanto ao tempo de internação, internações na UTI e tempo de internação na UTI. O modelo de regressão linear mostrou que o número de internações para duodenopancreatectomia e a idade estiveram significativamente associados à mortalidade hospitalar. Conclusão: o volume institucional da duodenopancreatectomia implica em diminuição da mortalidade intra-hospitalar. Os achados deste estudo nacional podem afetar a forma como o sistema público de saúde gerencia os cuidados com a duodenopancreatectomia..

Cribado de cáncer de páncreas en la práctica clínica: es el momento de la prevención

El cribado de cáncer de páncreas en población de alto riesgo puede mejorar la supervivencia. Sin embargo, hay pocas referencias sobre su aplicabilidad y hallazgos en la práctica clínica habitual. Nuestro objetivo es evaluar los hallazgos de las pruebas de cribado de cáncer de páncreas en individuos de alto riesgo en la práctica clínica y describir las variables asociadas a la presencia de lesiones relevantes. Este es un estudio observacional prospectivo en el que se seleccionaron pacientes con alto riesgo de cáncer de páncreas, según los criterios del Consorcio Internacional de Cribado de Cáncer de Páncreas. Se analizaron variables demográficas, presencia de factores de riesgo de cáncer páncreas y los hallazgos de las pruebas. Posteriormente se compararon pacientes que presentan lesiones relevantes con aquellos sin hallazgos. De 70 pacientes de alto riesgo, 25 cumplieron los criterios de cribado. El síndrome hereditario más frecuente fue el cáncer de mama y ovario hereditario (60%). En once individuos (44%) se identificaron hallazgos y en tres (12%) fueron relevantes: dos tumores papilares mucinosos intraductales y un tumor sólido localizado. La mutación en BRCA2 fue la más frecuente en lesiones significativas (66,7% vs 30%, p=0,376) sin encontrar asociación con diabetes ni tabaquismo (0 vs 18 %, p=0,578 y 0 vs 4,5%, p=0,880 respectivamente). En conclusión, las pruebas de cribado permiten detectar lesiones en estadio precoz o resecables en un importante porcentaje de población de alto riesgo seleccionada. Los hallazgos más relevantes fueron en los pacientes pertenecientes al síndrome de cáncer de mama y ovario hereditario.

Pancreatic cancer surveillance can improve outcomes in high-risk individuals. However, little is known about its applicability and findings in routine clinical practice. Our aim was to evaluate findings on screening tests in high-risk individuals in a clinical practice setting and to analyze factors associated with the presence of relevant pancreatic lesions. We developed a prospective observational study of pancreatic cancer high risk patients that meet criteria of surveillance from the International Cancer of the Pancreas Screening Consortium. The demographic variables, other risk factors and imaging findings are collected. Patients with significant findings are compared to those without noteworthy findings. Of 70 high-risk individuals, 25 fitted the criteria for pancreatic cancer surveillance. The most frequent condition was hereditary breast and ovarian cancer syndrome (60%). We identified eleven abnormal imaging findings (44%) and three of them (12%) were relevant: two intraductal papillary mucinous neoplasms and one localized pancreatic neoplasm. BRCA2 mutation was more frequent in patients with significant lesions (66.7% vs 30%, p=0.376) but smoking and diabetes were not associated with relevant findings (0 vs 18 %, p=0.578 and 0 vs 4.5%, p=0.880 respectively). Screening test could detect early-stage or resectable lesions in a significant in a significant percentage of the selected high-risk population. The most relevant findings were in patients belonging to hereditary breast and ovarian cancer syndrome.

Imaging manifestations of von Hippel-Lindau disease: an illustrated guide focusing on abdominal manifestations / Manifestações de imagem da doença de von Hippel-Lindau: um guia ilustrado das manifestações abdominais

Abstract Von Hippel-Lindau (VHL) disease is a monogenic autosomal dominant disorder with germline mutations of the VHL anti-oncogene on the short arm of chromosome 3 (3p25-26). It affects 1:36,000-50,000 individuals, with a penetrance greater than 90% at 65 years of age. Although of variable onset and presentation, with pleiotropism even among members of the same family who share a specific mutation, VHL disease usually manifests initially in young adults. It predisposes to the development of benign and malignant tumors of the central nervous system (CNS) and visceral organs. The clinical diagnosis of VHL disease can be made in the following circumstances: a) in patients with a family history of the disease and at least one of the tumors characteristic of it (e.g., retinal or CNS hemangioblastomas, clear cell renal cell carcinoma, pancreatic neuroendocrine tumors, and endolymphatic sac tumors); b) in patients with two or more CNS hemangioblastomas; c) or in patients with a retinal or CNS hemangioblastoma plus at least one visceral tumor characteristic of the disease, excluding renal and epididymal cysts. Imaging plays an important role in the diagnosis and follow-up of patients with VHL disease. This pictorial essay presents characteristic images of abdominal manifestations of VHL disease-related tumors that all radiologists should be aware of.

Resumo A doença de von Hippel-Lindau (VHL) é uma desordem autossômica dominante monogênica com mutações na linha germinativa do antioncogene VHL, no braço curto do cromossomo três (3p25-26). Afeta 1:36.000-50.000 indivíduos, com penetrância superior a 90% aos 65 anos de idade. Embora tenha início e apresentação variáveis, com pleiotropismo mesmo entre membros da mesma família que partilham uma mutação específica, usualmente manifesta-se de início em adultos jovens e predispõe ao desenvolvimento de tumores benignos e malignos no sistema nervoso central (SNC) e órgãos viscerais. Clinicamente, o diagnóstico pode ser realizado em uma das seguintes circunstâncias: a) em pacientes com história familiar de doença de VHL e pelo menos um dos tumores característicos relacionados à síndrome (como hemangioblastomas retinianos ou do SNC, carcinoma de células renais de células claras, tumores neuroendócrinos pancreáticos e tumores do saco endolinfático); b) dois ou mais hemangioblastomas do SNC; c) um hemangioblastoma retiniano ou do SNC mais pelo menos um tumor característico visceral relacionado à síndrome, excluindo-se cistos renais e epididimários. Nesse contexto, a imagem ocupa importante papel no diagnóstico e acompanhamento desses pacientes. Este ensaio iconográfico apresenta imagens características de manifestações abdominais de tumores relacionados à doença de VHL que todos os radiologistas devem conhecer.

Biliary Tract Microbiota Similarities in Pancreatic Ductal Adenocarcinoma / Similitudes en la Microbiota de Tracto Biliar en Adenocarcinoma Ductal de Páncreas

Abstract Objective: to analyze microbiota profiles in the biliary tract, of pancreatic ductal adenocarcinoma (PDAC) patients and gallstones patients, in order to identify dif ferences, which may contribute to a better understanding of PDAC carcinogenesis. Methods: using microbiota analysis, a total of 25 samples from 14 patients were collected during surgery and compared. Samples were divided into three groups; one GS group (N = 3), and two PDAC groups; PDAC gallbladder group (N = 11) and PDAC brush group (N = 11). Results: upon comparison of bacterial communities' alpha and beta diversity indices and relative abundances by group (anatomic site) and condition (GS vs PDAC), we found no statistically significant results. However, we can highlight the high similarity of the compared parameters among the two different anatomic locations over the biliary tract in PDAC patients. Conclusion: to the best of our knowledge, this is the first study comparing two different anatomic locations over the biliary tract in PDAC patients. Among PDAC groups microbiota along the semi-closed duct system of the biliary tract showed substantial similarity, reflected in the alpha and beta diversity indices and relative abundances.

Resumen Objetivo: analizar los perfiles de microbiota en el tracto biliar de pacientes con adenocarcinoma ductal pancreático (PDAC) y pacientes con cálculos biliares (GS), con el fin de identificar diferencias, lo que puede contribuir a una mejor comprensión de la carcinogénesis de PDAC. Métodos: mediante análisis de microbiota, se recolectaron durante la cirugía un total de 25 muestras de 14 pacientes y se compararon. Las muestras se dividieron en tres grupos; Grupo GS (N = 3) y dos grupos PDAC; Grupo de vesícula biliar PDAC (N = 11) y grupo de cepillado PDAC (N = 11). Resultados: al comparar los índices de diversidad alfa y beta de las comunidades bacterianas y las abundancias relativas por grupo (sitio anatómico) y condición (GS vs PDAC), no encontramos diferencias estadísticamente significativas. Sin embargo, podemos destacar la gran similitud de los parámetros comparados entre las dos ubicaciones anatómicas diferentes en el tracto biliar en pacientes con PDAC. Conclusión: hasta donde sabemos, este es el primer estudio que compara dos ubicaciones anatómicas diferentes sobre el tracto biliar en pacientes con PDAC. Entre los dos grupos de PDAC, la microbiota del sistema de conductos semicerrados del tracto biliar, se encontró una similitud sustancial, reflejada en los índices de diversidad alfa y beta y en abundancias.

Pancreatic cáncer incidence and mortality trends: a population-based study / incidencia de cáncer pancreático y tendencias de mortalidad: un estudio basado en la población

ABSTRACT Objectives To analyze trends in pancreatic cancer incidence and mortality in Latin American countries. Methods An ecological study with incidence data from the International Agency for Research on Cancer and mortality data from the World Health Organization. The trend of incidence by Joinpoint regression, the variation of the annual average and the 95% confidence interval were analyzed. Results There were increasing trends in incidence in Brazil, in males, aged 40-59 years, and reduction in Costa Rica. In females, there was stability in all age groups. The mortality rates increased in the elderly in Brazil (AAPC: 1.09%; 95% CI: 0.76; 1.42), Peru (AAPC: 1.76%; 95% CI: 0.36; 3.17) and El Salvador (AAPC: 2.88%; 95% CI: 0.38; 5.43), while in Mexico, there was a reduction. In females, this rate increased in Brazil (AAPC: 1.38%; 95% CI: 1.07; 1.69), Peru (AAPC: 2.25%; 95% CI: 0.68; 3.85), Chile (AAPC: 3.62%; 95% CI: 1.96; 5.31), Nicaragua (AAPC: 2.51%; 95% CI: 0.36; 4.71) and Paraguay (AAPC: 1.17%; 95% CI: 0.37; 1.98) and a downward trend was observed in Colombia and Ecuador. Conclusions Pancreatic cancer had a higher incidence in the elderly population of both sexes and an increase of the mortality trend in females was noted.

RESUMEN Objetivo Analizar las tendencias en la incidencia y mortalidad por cáncer de páncreas en los países latinoamericanos. Método Se realizó un estudio ecológico con datos de incidencia de la Agencia Internacional de Investigación sobre Cáncer y datos de mortalidad de la Organización Mundial de la Salud. Se analizó la tendencia de incidencia por regresión de Joinpoint, la variación del promedio anual y el intervalo de confianza del 95%. Resultados Hubo tendencias crecientes en la incidencia en Brasil en varones entre 40 y 59 años, y una reducción en Costa Rica. En las mujeres, hubo estabilidad en todos los grupos de edad. Las tasas de mortalidad aumentaron en los ancianos en Brasil (AAPC: 1,09%; IC 95%: 0,76; 1.42), Perú (AAPC: 1,76%; IC 95%: 0,36; 3,17) y El Salvador (AAPC: 2,88%; 95% IC 0,38; 5,43), mientras que en México hubo una reducción. En las mujeres, esta tasa aumentó en Brasil (AAPC: 1,38%; IC 95%: 1,07; 1.69), Perú (AAPC: 2,25%; IC 95%: 0,68; 3.85), Chile (AAPC: 3,62%; IC 95%: 1,96; 5,31), Nicaragua (AAPC: 2,51%; IC 95%: 0,36; 4,71) y Paraguay (AAPC: 1,17%; IC 95%: 0,37; 1,98) y se observó una tendencia a la baja en Colombia y Ecuador. Conclusiones El cáncer de páncreas tuvo una mayor incidencia en la población anciana de ambos sexos; cabe también señalar que debido a este aumentó su mortalidad en las mujeres.

Leiomioma primario de páncreas en una gestante: presentación de caso / Primary pancreatic leimyoma in a pregnant woman: case report

RESUMEN Introducción: Los tumores pancreáticos en el embarazo son muy raros, el diagnóstico y tratamiento en este grupo de pacientes es complejo. Objetivo: Presentar el primer caso de un leiomioma primario del páncreas en una gestante. Caso clínico: Embarazada de 26 años de edad, sin antecedentes relevantes. Primigesta, que se encontraba cursando la semana 13 de gestación. Durante una evaluación ecográfica de rutina, se le detecta una tumoración en la glándula pancreática. Se remitió a la consulta multidisciplinaria de atención a la materna y en conjunto deciden realizar la interrupción voluntaria del embarazo. Luego la paciente fue remitida a la consulta de la especialidadde Cirugía General. Al recibir a la misma, se quejaba de dolor en epigastrio e hipocondrio izquierdo, además de hipo ocasional. Al examen físico se encontró una tumoración palpable en epigastrio. Se realizaron exámenes analíticos básicos sin encontrarse alteraciones, en los estudios de imagen realizados, ecografía abdominal y tomografía contrastada de abdomen se demostró una tumoración en el cuerpo y cola del páncreas. Se planificó tratamiento quirúrgico electivo, se realizó pancreatectomía distal con esplenectomía, por invasión del estómago, se complementó con gastrectomía subtotal. La paciente evoluciona sin complicaciones. La biopsia informó un tumor mesenquimal benigno primario de páncreas, tipo leiomioma, bien encapsulado. Conclusiones: Se presenta el primer caso de un leiomioma primario del páncreas en una gestante. Los tumores pancreáticos en embarazadas son enfemedades raras, el manejo por un equipo multidisciplinario es la mejor forma de obtener resultados satisfactorios para la paciente.

ABSTRACT Introduction: Pancreatic tumors during pregnancy are very rare, diagnosis and treatment are always difficult. Objective: To present the first case of a primary pancreatic leiomyoma in a pregnant woman. Case report: A 26 years old primiparous pregnant is reported, with no relevant backgrounds. She was in her first trimesters of pregnancy. Diagnosed with a pancreatic tumor during a routine evaluation. She was referred to a multidisciplinary consult, deciding the voluntary interruption of pregnancy, then she is evaluated by the General Surgery specialty clinic for complaining of epigastric pain and hiccup. On physical examination an epigastric tumor was found. Auxiliary exams were normal. Imagenologic studies confirm a tumor in the pancreatic body and tail. Surgical treatment was scheduled, distal pancreatectomy with splenectomy, due to invasion of gastric wall subtotal distal gastrectomy was performed. Patient evolution without complications. Biopsy reported a well capsulated, leiomyoma type, primary mesenchymal pancreatic tumor. Conclusions: The first case of a primary pancreatic leiomyoma in a pregnant woman is presented. Pancreatic tumors during pregnancy are rare. Multidisciplinary approach is the best way to improve results.