Pancreatic Mucinous Cystadenocarcinoma with Splenic Artery Pseudoaneurysm Presenting as Hemosuccus Pancreaticus

Abstract

A 25-year-old woman with a pancreatic cystic lesion was admitted to our hospital. She also had a history of repeated acute pancreatitis and melena. Contrast-enhanced abdominal CT revealed a multilocular cystic lesion in the pancreatic tail and a splenic artery aneurysm beside the cyst. The cyst included high-density content indicative of obsolete hematoma. Based on these findings, we diagnosed mucinous cystic neoplasm with hemosuccus pancreaticus caused by ruptured pseudoaneurysm into the cyst. We performed distal pancreatectomy after splenic artery embolization. Pathological findings showed mucinous cystadenocarcinoma with minimal invasion and ruptured aneurysm into the cystic tumor. Mucinous cystadenocarcinoma with pancreatitis or splenic artery pseudoaneurysm is rare, and we report this case with a review of the literature.