Not Your Everyday Case of Acute Pancreatitis: A Rare Complication of a Common Diagnosis.

Pancreaticopericardial fistula is an extremely rare complication of chronic pancreatitis and is virtually unheard of in the setting of acute pancreatitis. A 67-year-old male presented with acute pancreatitis complicated by pancreaticopericardial fistulization. The patient's initial presentation was consistent with tamponade physiology.