Sigmoidoscopy Topic Guide
Colon Cancer The human colon is a muscular, tube-shaped organ measuring about 4 feet long. It extends from the end of your small bowel to your anus. Most colon cancers start as adenomatous polyps that turn into adenocarcinomas. Colon cancer is typically diagnosed through a colonoscopy or other type of endoscopic procedures. Treatment methods include surgery, radiation, and chemotherapy.
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