Pancreatic mucinous carcinoma derived from a branch duct type intraductal papillary mucinous neoplasm in a 40 year-old male: a case report

Abstract

A 40-year-old man was introduced to our hospital for further investigation of a cystic tumor in the pancreatic tail. Abdominal ultrasonography and endoscopic ultrasonography revealed a low echoic cystic mass lesion with a solid portion in the pancreatic tail. Abdominal computed tomography showed some enhanced parts of a low density mass in the pancreatic tail, which was recognized as low- and high-intensity mass on T1- and T2-WI magnetic resonance images, respectively. Endoscopic retrograde pancreatography revealed no dilated main pancreatic duct and cystic mass lesion communicated with the main pancreatic duct. We did not see mucin in the duodenal papilla. Pancreatic juice cytology was negative. Under the diagnosis of intraductal papillary-mucinous carcinoma, distal pancreatectomy with splenectomy was performed. Histopathological diagnosis of the resected specimen showed a mucinous carcinoma derived from a branch duct type intraductal papillary mucinous neoplasm.