What are encapsulated pancreatic enzymes commonly found in the lesser sac called?

The correct term for encapsulated pancreatic enzymes found in the lesser sac is a pseudocyst. A pseudocyst is a collection of fluid that arises from the pancreas and is typically surrounded by a thick fibrous wall. It occurs when pancreatic enzymes leak into the surrounding tissue due to conditions like pancreatitis, leading to localized inflammation and encapsulation.

Pseudocysts can be found in various locations, but when they occur in the lesser sac (which is located behind the stomach and in front of the pancreas), they are particularly relevant in the context of pancreatic diseases. These structures may contain a mixture of pancreatic enzymes, necrotic tissue, and inflammatory cells, but they are not lined by the epithelium, which differentiates them from true cysts.

Understanding the nature of pseudocysts is crucial for diagnosis and treatment, as they can lead to complications such as infection or rupture if they enlarge or are left untreated. This knowledge emphasizes the importance of recognizing abdominal imaging findings indicative of pseudocysts, especially in patients with a history of pancreatic disease.