The pseudocyst of the pancreas is one of the most common cystic lesions of the pancreas. The pseudocysts can be defined as intrapancreatic, peripancreatic or extrapancreatic fluid collections with a defined wall formed mostly on the basis of acute or chronic pancreatitis. This is a relatively common complication of acute or chronic pancreatitis. Sonography is essential for the diagnosis given its noninvasivity and availability. Other assessments that show the highest accuracy, specificity and sensitivity include MDCT and ERCP. The MDCT and ERCP assessments can be used to classify the pseudocyst; the treatment algorithm is then determined based on this classification. MDCT should ideally be preceded by ERCP. EUS-FNAB or aspiration with the determination of oncomarkers and AMS in the aspirate have been shown to be most important to distinguish the pseudocyst from malignant cystic lesions. Functional classification of the pseudocyst is an important prerequisite for successful algorithm of the treatment. The classification is based mainly upon anatomical relations of the pseudocyst to the pancreatic outlet and morphology of the pancreatic parenchyma. Percutaneous drainage, endoscopic and surgical methods are mainly applied in the treatment. The authors present a case report of a very rare extrapancreatic pseudocyst.
Key words: pseudocyst pancreatic pseudocyst classification extrapancreatic pseudocyst.