Colorectal cancer is a type of cancer that starts in the large intestine (colon and rectum). It can spread to other parts of the body, including the liver. It usually starts in small polyps that grow into tumors. These can cause bleeding or other symptoms.

what is colorectal cancer colorectal cancer into stages based on how far the tumor has grown into the colon or rectum wall and whether it has spread to other organs. The stage of a colorectal cancer can help doctors decide what treatment is best.

People who have had colorectal cancer in the past have a higher risk of getting it again. But regular screenings can find the cancer early, when it’s easier to treat. Screening tests can also remove precancerous polyps that could turn into cancer later.

The most common type of colorectal cancer is adenocarcinoma. It starts in cells that line the colon and rectum and make mucus to lubricate the bowel. There are several subtypes of adenocarcinoma, such as signet ring and mucinous. These have a worse prognosis than other types of colorectal cancer.

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Other types of colorectal cancer include squamous cell carcinoma and intestinal tumor. These start in the squamous cells that line the colon and rectum. Squamous cell carcinoma is more common in people who have inflammatory bowel disease (IBD) for many years, especially when it’s untreated. It’s not clear why IBD increases the risk of colon cancer.

Most people with stage 4 colorectal cancer get chemotherapy to destroy any remaining cancer cells. They may also get radiation therapy to the area of the liver that has metastasized. They may also need surgery to remove a tumor that is blocking the intestine or causing other symptoms. A newer treatment is hepatic artery infusion (HAI), which delivers chemotherapy directly to the liver.