CTICasesPancreatic Pseudocyst with Posterior Mediastinal and Neck Extension
Imaging findings
Chest radiographs show bilateral pleural effusions and abnormal mediastinal contours. Contrast-enhanced CT reveals a massive, continuous fluid-attenuation collection starting in the abdomen and extending superiorly through the posterior mediastinum, encasing the aorta, esophagus, and trachea, all the way into the lower neck.
Key takeaways
Pancreatic pseudocysts can occasionally track superiorly into the chest through the esophageal or aortic hiatus, typically occupying the posterior mediastinum. When encountered, they can mimic other cystic mediastinal masses, but a history of pancreatitis or a direct connection to the abdomen on imaging is diagnostic.
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