Testing gut microbiome for colorectal cancer screening

A Non-invasive Gut Microbiome-based Diagnostic Tool for the Screening of Colorectal Cancer

Observational Fondazione Policlinico Universitario Agostino Gemelli IRCCS · NCT06588166

This study is trying to see if testing the gut bacteria of people aged 50-74 who have a positive stool test can help find colorectal cancer earlier and reduce the need for unnecessary colonoscopies.

Quick facts

Study typeObservational
Enrollment1006 (estimated)
Ages50 Years to 74 Years
SexAll
SponsorFondazione Policlinico Universitario Agostino Gemelli IRCCS Academic / other
Locations1 site (Roma)
Trial IDNCT06588166 on ClinicalTrials.gov

What this trial studies

This observational study aims to develop a diagnostic tool based on gut microbiome testing to identify colorectal cancer (CRC) and advanced colorectal adenomas. It focuses on patients aged 50-74 who are participating in the national CRC screening program and have tested positive for fecal immunochemical testing (FIT). The study leverages evidence that specific alterations in the gut microbiome are associated with CRC, aiming to improve diagnostic accuracy and reduce unnecessary colonoscopies. By identifying microbial signatures that differentiate CRC patients from healthy individuals, the study seeks to enhance early detection methods.

Who should consider this trial

Good fit: Ideal candidates are patients aged 50-74 who are part of the national CRC screening program and have a positive FIT result.

Not a fit: Patients who are unfit for colonoscopy or have other oncological conditions or severe gastrointestinal diseases may not benefit from this study.

Why it matters

Potential benefit: If successful, this approach could lead to more accurate and non-invasive screening for colorectal cancer, potentially reducing mortality rates.

How similar studies have performed: While the approach of using microbiome-based biomarkers for CRC screening is supported by emerging evidence, this specific study represents a novel application in clinical practice.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients participating in the national CRC screening program (50-74 years old)
* Positivity to the FIT;
* Ability to provide written informed consent and to be compliant with the study procedures

Exclusion Criteria:

* Patients unfit for colonoscopy;
* Other oncological conditions;
* Concomitant severe comorbidities or gastrointestinal (GI) organic diseases (e.g. diverticular disease, inflammatory bowel disease);
* Antibiotics,proton pump inhibitors or probiotics within 4 weeks prior to enrollment.

Where this trial is running

Roma

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Colorectal Cancermicrobiomemicrobiome testingcolorectal cancercolorectal cancer screening
Last reviewed 2026-06-09 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.