Non-invasive MR Demonstration of the Fistula between Pancreatic Pseudocyst and Portal Vein: A Case Report

Acute pancreatitis is a common disease with a wide variety of complications. Most cases of acute pancreatitis are mild with rapid recovery and good prognosis. However, in 20-30% of cases, the clinical course can be severe with life-threatening complications such as extensive pancreatic necrosis, pancreatic abscess formation, and vascular complications (1). Pancreatic pseudocyst is a well-known complication of acute or chronic pancreatitis. And vascular complications related to pancreatic pseudocyst include pseudoaneurysm formation, arterial hemorrhage, and venous thrombosis. Pseudocyst rupture into the portal vein is a very rare complication and only a few cases are reported in literature (2-6). We report a case of fistula formation between the pseudocyst and the portal vein, diagnosed noninvasively by ultrasonography (US), computed tomography (CT), and magnetic resonance imaging (MRI).