A 42-year-old female presents with acute epigastric pain radiating to the back. Serum amylase is markedly elevated. She is later discharged after his pain settles. A CT of the abdomen performed 6 weeks after symptom onset reveals peripancreatic fat stranding, and several fluid collections around the pancreas. The pancreas enhances homogeneously throughout. No vascular complications are noted.

What is the most appropriate term to describe the fluid collections?