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colorectal cancer
Colon cancer is cancer of the lower part of the digestive system, which includes the large intestine, also known as the colon, and the rectum. Rectal cancer is cancer of the last several inches of the colon. Together, they're often referred to as colorectal cancers.





















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Most cases of colon cancer begin as small, noncancerous (benign) clumps of cells called adenomatous polyps. Over time these polyps can develop in colon cancer if left untreated.
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Adenocarcinoma is the most common type of colon cancer but there are many other forms as well. Examples include leiomyosarcoma, lymphoma, melanoma, and neuroendocrine tumors.
What is Colorectal Cancer?
Colon cancer is cancer of the large intestine and the rectum, and can affect a variety of people.
Screening is the most effective way of preventing the development of colon cancer and detecting it earlier.
Overview
Important
Symptoms
Colorectal polyps and colorectal cancer do not always produce tangible symptoms, and thus one could have it and not know it. This is why regular screening is so important.

Signs and symptoms of colon cancer, if present, may include:
- A change in your bowel habits, including diarrhea or constipation or a change in the consistency of your stool
- Rectal bleeding or blood in your stool
- Persistent abdominal discomfort, such as cramps, gas or pain
- A feeling that your bowel doesn't empty completely
- Weakness or fatigue
- Unexplained weight loss
