Rectal Cancer: The rectum is the lower part of the colon that connects the large bowel to the anus. The rectum's primary function is to store formed stool in preparation for evacuation. Rectal cancer symptoms and signs include bleeding, bowel obstruction, weight loss, change in bowel habits, constipation, narrow stools, and pain during bowel movements. Treatment may involve surgery, chemotherapy, and radiation.
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.