A trial comparing pembrolizumab with other immunotherapies for bowel cancer that has spread (MK-1308A-008)

This trial is looking at new immunotherapy drugs to treat bowel cancer that has spread elsewhere in the body. It is comparing these drugs with pembrolizumab on its own.

Bowel cancer that has spread to another part of the body is advanced cancer.

It is for people with certain gene changes in the bowel cancer cells. These gene changes are microsatellite instability high (MSI H) or mismatch repair deficiency (MMRd).