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Details about COVID-19, monkeypox, and the flu vaccine

Colorectal Cancer

Colorectal cancer happens when cells in your colon or rectum grow abnormally and out of control. It may start as a polyp, or small growth, in your colon or rectum. The cancer cells can spread to other parts of your body.

This cancer is also called colon cancer or rectal cancer, depending on where the cancer is. It is most common in people older than 50.

Treatment works best when the cancer is found early. Screening tests can help find polyps and can find cancer that is still in its early stages and hasn't spread yet.

INTERESTED IN AN ONLINE SECOND OPINION?

The Stanford Medicine Online Second Opinion program offers you easy access to our world-class doctors. It’s all done remotely and you don’t have to visit our hospital or one of our clinics for this service. You don’t even need to leave home!

Visit our online second opinion page to learn more.

Clinical Trials

Open Clinical Trials

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Open trials refer to studies currently recruiting participants or that may recruit participants in the near future. Closed trials are not currently enrolling, but similar studies may open in the future.

Closed trials are not currently enrolling, but may open in the future.