Symptomatic acinar cell cystadenoma of the pancreas.

Acinar cystic transformation (ACT), also known as 'acinar cell cystadenoma', is an uncommon cystic neoplasm of pancreas with unknown malignant potential. This case regards a woman with symptomatic pancreatic head ACT, revealed with pathological exam of specimen after pancreaticoduodenectomy. A 57-years-old patient presented mild hyperbilirubinemia and recurrent cholangitis; she underwent to ERCP, EUS and MRI, and these exams revealed a large cyst of the pancreatic head that caused biliary compression. The discussion of the case by the multidisciplinary group indicated surgical resection. Pancreatic ACT is so rare, and its preoperative diagnosis is difficult. The symptoms of the patients and the features of the cyst are the criteria to choose a surgical resection.