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.

Highlights PNs with irregular, lobuled or spiculated margins exhibited faster growth than PNs with regular, smooth margins. Malignancy was significantly associated with male gender, a colorectal cancer diagnosis and advanced stage disease. Oncologic patients should have an individualized CT follow-up strategy, as the rate of malignant pulmonary nodules is higher than in the general population.

Objective: The purpose of our study was to evaluate the transmission of information from radiologists to physicians, focusing on the level of certainty and the use of imaging descriptors from the tumor–node–metastasis (TNM) staging system. Materials and Methods Radiologists (n = 56) and referring physicians (n = 50) participated in this questionnaire-based, single-center study, conducted between March 20, 2020, and January 21, 2021. Participants were presented with terms commonly used by the radiologists at the institution and were asked to order them hierarchically in terms of the level of certainty they communicate regarding a diagnosis, using a scale ranging from 1 (most contrary to) to 10 (most favoring). They then assessed TNM system descriptors and their interpretation. Student’s t-tests and the kappa statistic were used in order to compare the rankings of the terms of certainty. Items related to T and N staging were analyzed by Fisher’s exact test. The confdence level was set to 97% (p < 0.03). Results: Although overall agreement among the radiologists and referring physicians on term ranking was poor (kappa = 0.10–0.35), the mean and median values for the two groups were similar. Most of the radiologists and referring physicians (67% and 86%, respectively) approved of the proposal to establish a standard lexicon. Such a lexicon, based on the participant responses, was developed and graphically represented. Regarding the TNM system descriptors, there were significant differences between the two groups in the reporting of lymph node numbers, of features indicating capsular rupture, and of vessel wall irregularities, as well as in the preference for clear descriptions of vascular involvement. Conclusion: Our findings indicate that ineffective communication and differences in report interpretation between radiologists and referring physicians are still prevalent in the fields of radiology and oncology. Efforts to gain a better understanding of those impediments might improve the objectivity of reporting and the quality of care.

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.

Objetivo: avaliar o papel da ressonância magnética (RM) no atendimento de urgência e emergência em um centro de referência oncológica, identificando suas principais indicações, achados e seus impactos na conduta terapêutica e tomada de decisão. Materiais e métodos: estudo analítico retrospectivo, que envolveu a revisão de registros médicos e relatórios de imagem para todos os pacientes que foram submetidos a exames de RM na urgência ou emergência entre junho de 2017 e junho de 2018 no departamento de imagem. Resultados: 317 laudos de RM revisados foram incluídos na análise. A RM foi realizada para investigar metástases e complicações relacionadas à doença de base em 246 (77,6%) casos e em 71 (22,4%) para explorar os motivos clínicos apresentados durante o atendimento de emergência. Os achados foram positivos (confirmando as indicações suspeitas) em 211 (66,6%) casos e negativos em 106 (33,4%). Nenhum paciente morreu durante a hospitalização. Conclusão: o método de imagem foi capaz de caracterizar as lesões, com concordância clínica, permitindo melhor compreensão da complexidade tumoral e do acompanhamento terapêutico.