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Abdominal cancer occurs when old or damaged cells divide and multiply uncontrollably. The underlying cause of this varies depending on the specific form of cancer. For example: Colorectal cancer commonly develops from adenomatous intestinal polyps in the colon that are not removed while still benign.
Liver cancer is often caused by certain types of liver disease, often chronic hepatitis B or C infection or alcoholism. Liver cancer can also be caused by another cancer in the body that spreads to the liver. Stomach cancer is linked to significant risk factors but the exact cause is not known.