Keytruda shows promise in shrinking untreatable bowel tumors
NCT ID NCT05131919
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This phase 2 trial is testing the immunotherapy drug pembrolizumab (Keytruda) in 25 adults with a specific type of advanced colorectal cancer (dMMR) that cannot be surgically removed. The goal is to see if the drug can shrink the tumors enough to make surgery possible. Treatment is given every three weeks for up to two years. The study is active but no longer recruiting new participants.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Pembrolizumab (Keytruda)
What this could lead to
If successful, this could offer a way to shrink advanced colorectal tumors enough to allow surgical removal, potentially avoiding the need for more aggressive treatments.
What could go wrong
This is a small, early-phase trial with only 25 participants. Not all patients may respond, and the treatment may cause side effects like immune-related inflammation. It is not a cure.
Disclaimer
Read more
Show less
This is a summary of
the original study
.
Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for COLORECTAL CANCER are added.
By submitting, you agree to our Terms of use
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Show contact details
Enter your email to view the contact information for this study.
By submitting, you agree to our Terms of use
Locations
-
Netherlands Cancer Institute
Amsterdam, 1066 CX, Netherlands