Colon cancer is increasingly affecting young adults. A gastroenterologist explained what a healthy colon looks like and the changes that occur when abnormal cells begin to grow, causing cancer. The ...

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Hemorrhoids, colorectal cancer and anal cancer can all cause bleeding from the anus or rectum. Here are the main differences: ...

Bleeding in the gastrointestinal tract and colon cancer can cause black poop (also known as melena). But black stool doesn't always mean there is an underlying health concern. Dark-colored foods, iron ...