Metastasis. A major concern when diagnosing a pancreatic cancer is whether or not the cancer has already spread (metastasized) outside of the pancreas.
M1: Cancer has spread to another part of the body, including distant lymph nodes. Pancreatic cancer most commonly spreads to the liver, the lining of the abdominal cavity called the peritoneum, and lungs.
Pancreatic cancer is considered Stage IV if it has spread to distant locations in the body, such as the liver, lungs, or adjacent organs including the stomach, spleen, and/or the bowel.