A cystic adenocarcinoma characterized by the presence of relatively uniform neoplastic cells which produce pancreatic enzymes and are arranged in acinar patterns. Signs and symptoms include abdominal pain, weight loss, nausea, and diarrhea. It usually has an aggressive clinical course. The disease is pancreatic acinar cell cystadenocarcinoma (Monarch Disease Ontology term MONDO_0004343). Also known as: acinar cell cystadenocarcinoma, acinar cell cystadenocarcinoma (morphologic abnormality), acinar cell cystadenocarcinoma of pancreas, acinar cell cystadenocarcinoma of the pancreas.