Blood test may replace scans for some colorectal cancer patients on immunotherapy
NCT ID NCT06098560
First seen Jun 25, 2026 · Last updated Jul 01, 2026 · Updated 3 times
Summary
This study is looking at whether a simple blood test that tracks tumor DNA (ctDNA) can better predict how well immunotherapy is working in people with advanced colorectal cancer. Currently, doctors rely on imaging scans, which can miss cases where the cancer is actually gone. The study will follow 60 patients to see if changes in ctDNA levels match with complete responses after surgery or over time.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this could lead to a simple blood test to monitor immunotherapy effectiveness in colorectal cancer, helping doctors decide on treatment without relying solely on scans.
- What could go wrong
- This is an observational study, not a treatment trial. It is small (60 participants) and early-stage, so results may not apply to all patients or change practice immediately.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 60 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Oct 2023
- Expected to finish
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Dec 2026
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Colorectal cancer patients with MSI-H/dMMR who are expected to receive / receiving immunotherapy
- Ages
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18 to 80 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: \- advanced or locally advanced dMMR/MSI-H colorectal cancer Expected to receive/be receiving immune checkpoint inhibitor therapy ECOG performance score is 0-1, life expectancy ≥12 weeks Exclusion Criteria: \- The presence of other uncured malignancies Patients with one or more serious concomitant systemic diseases that, in the investigator's opinion, impair the patient's ability to complete the study Patients with autoimmune disease are not suitable for PD1 monoclonal antibody therapy
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
2 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Fudan University Shanghai Cancer Center
RECRUITINGShanghai, China
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Peking Union Medical College Hospital
RECRUITINGBeijing, Beijing Municipality, 100730, China
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