A Case of Resection of a Pancreatic Mucinous Cystic Neoplasm in a Man with Acute Pancreatitis

Abstract

A 50-year-old man was admitted to our hospital with a chief complaint of abdominal pain. Abdominal CT showed a 17-mm unilocular cystic lesion in the pancreatic tail and dilation of the main pancreatic duct distal to the lesion. The pancreatic parenchyma was swollen. The fat tissue density around the pancreas was increased and indicative of pancreatitis. There was no communication between the main pancreatic duct and the cystic lesion based on MRCP, and endoscopic ultrasound showed a unilocular cystic lesion with no solid components or septal structure. The patient was diagnosed as having a retention cyst and acute pancreatitis, and received conservative therapy. Because of recurrence of pancreatitis due to stenosis of the main pancreatic duct caused by the cystic lesion, laparoscopic-assisted distal pancreatectomy was performed. The lesion was a bilocular cyst, and histopathologically, ovarian-type stroma was observed in the cystic wall. Thus, the lesion was diagnosed as a mucinous cystic adenoma. Pancreatic mucinous cystic neoplasms in males are less frequent than in females, but if suspicious findings are found on imaging, this disease should be considered in the differential diagnosis.