Colorectal cancer starts in the colon or the rectum. These cancers can also be referred to separately as colon cancer or rectal cancer, depending on where they start, though they have many aspects in common.
Liver cancer is cancer that occurs in the liver as either a primary or a secondary cancer (spread from another organ).
Pancreatic cancer is the fourth most common cause of cancer death in the United States. One reason for the often poor outcome of pancreatic cancer is the location of the pancreas deep inside the body.
Stomach cancer, also known as gastric cancer, is cancer that starts in any part of the stomach. It usually occurs first in the tissues that line the stomach.