so the difference between cancers is only the area its affecting? when it says she had colon cancer and then pancreatic cancer its not a new cancer it just spread there?
"The spread of cancer from where it started to another place is called metastasis. No matter where else in the body it spreads, a cancer is still named for the place it originated. For instance, prostate cancer that has spread to the liver is still prostate cancer, not liver cancer, and treatment will reflect that."
Tissue. A growing tumor can push through surrounding tissues or into organs. Cancer cells from the primary tumor can break away and form new tumors nearby.
The lymph system. Cancer cells from the tumor can enter nearby lymph nodes. From there, they can travel the entire lymph system and start new tumors in other parts of the body.
The bloodstream. Solid tumors need oxygen and other nutrients to grow. Through a process called angiogenesis, tumors can prompt the formation of new blood vessels to ensure their survival. Cells can also enter the bloodstream and travel to distant sites.
