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Colorectal Cancer Health Center

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Colorectal Cancer Overview

Colon cancer and cancer of the rectum usually begin as a small polyp. While most colon polyps are benign, some do become cancerous. Colon cancer symptoms may include a change in bowel habits or bleeding, but usually colon cancer strikes without symptoms. That’s why it’s important to get a colon cancer screening test, such as a colonoscopy. If the cancer is found early, the doctor can use surgery, radiation, and/or chemotherapy for effective treatment.

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Fat Gene Linked to Colon Cancer
A gene that codes for a hormone made by fat cells affects colon cancer risk. A common variant of the gene cuts colon cancer risk by 27%.

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Understanding Colorectal Cancer - Symptoms

What Are the Symptoms?

In its early stage, colorectal cancer usually produces no symptoms. The most likely warning signs include:

  • Changes in bowel movements, including persistent constipation or diarrhea, a feeling of not being able to empty the bowel completely, or rectal bleeding
  • Dark patches of blood in or on stool; or long, thin, "pencil stools."
  • Abdominal discomfort or bloating
  • Unexplained fatigue, or loss of appetite or weight
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