Complicated chronic pancreatitis causing mycotic aortic aneurysm: In situ replacement with a cryopreserved aortic allograft

Mycotic aortic aneurysm, which resulted from infected pancreatic pseudocyst s with retroperitoneal abscess, developed in a patient with chronic pancrea titis. The aorta tvas approached through median laparotomy. Necrotic materi al was debrided from the pancreatic pseudocysts, and the mycotic aneurysm w as resected. The aorta was replaced in situ with a cryopreserved aortic all ograft. This report discusses the rare complication of pancreatic pseudocys ts, which affect the infrarenal abdominal aorta and cause a large mycotic a neurysm. This case suggests that the use of cryopreserved allografts is pro mising for in situ reconstruction, even in a grossly infected field.