| 1. External | High output (>200 mL/day) |
| Low output (<200 mL/day) | |
| Internal | Pancreatic ascites, pleural effusion, communication with other viscera or retroperitoneum or mediastinum |
| 2. Based on underlying disease process | Acute pancreatitis |
| Chronic pancreatitis | |
| Pancreatic cancer and other pancreatic neoplasms | |
| Normal pancreas | |
| 3. Based on the immediate predisposing cause | Postoperative (pancreatoduodenectomy, distal pancreatectomy, surgery on organs adjacent to pancreas) |
| Percutaneous drainage of pancreatic fluid collections | |
| Trauma |
