Pancreatic cancer starts in the cells of the duct and spreads into the body of the pancreas. Nearby blood vessels and nerves may be invaded. Without treatment, this type of cancer will spread to every abdominal organ and to other parts of the body, via the lymphatic system. The causes are unknown, but risk factors may include:
- Cigarette smoking
- Chronic pancreatitis
- Advancing age (over 65 years)