Mucinous Cystadenocarcinoma Initially Diagnosed as Recurrent Infected Pancreatic Pseudocyst After Acute Pancreatitis – Report of a Case

Received: August 9, 2011/Accepted: November 10, 2011 Correspondence to: Hiroshi Matsukiyo Department of Surgery, Toho University Ohashi Medical Center, 2-17-6 Ohashi, Meguro-ku, Tokyo 153-8515, Japan Abstract We report a case initially diagnosed as infected pancreatic pseudocyst after acute pancreatitis and treated by repeated endoscopic drainage, in which the final diagnosis was mucinous cystadenocarcinoma. A 60-year-old woman was admitted to our hospital’s gastroenterology department after developing acute pancreatitis and what seemed to be recurrent infected pseudocyst of the pancreatic tail. This was treated by endoscopic transpapillary drainage. However, because the cyst enlarged on imaging and serum carbohydrate antigen 19-9 level increased, we decided to treat the case surgically. Postoperative pathological examination revealed mucinous cystadenocarcinoma with direct invasion of the spleen and transverse colon.