Cancer of the rectum and colon often are referred together as colorectal cancer, but treatments can be different.

Dr. David Etzioni, a Mayo Clinic colorectal surgeon, reminds people that early diagnosis and treatment are crucial to ensure better outcomes, and that it all starts with scheduling a screening.

“Colorectal cancer is a type of cancer that arises from the skin that lines the inner surface of the colon and rectum.” Dr. Etzioni says the colon and the rectum are in effect the same.

“The colon and rectum are what we call the large intestine. It’s about 5 feet long and is the last part of the GI (gastrointestinal) tract, just before the GI stream exits the body. The rectum is the last 12 to 14 centimeters of the large intestine. And while they are somewhat geographically distinct, they are in effect one that runs into the other.”

Colon and rectal cancers are similar in many ways, but their treatment can be different, depending on stage and location.

“Usually when we find a colon cancer or rectal cancer, the operation involves removing a portion of the colon or rectum.”

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