Investigating factors influencing cancer risk in people with Lynch syndrome

The GEOLynch Cohort Study: Genetic, Environmental and Other Factors That Influence Tumour Risk Among Persons With Lynch Syndrome

Wageningen University · NCT03303833

This study is trying to find out how lifestyle, diet, and genetics affect cancer risk in people with Lynch syndrome.

Quick facts

Study typeObservational
Enrollment1000 (estimated)
Ages18 Years to 80 Years
SexAll
SponsorWageningen University (other)
Locations1 site (Wageningen)
Trial IDNCT03303833 on ClinicalTrials.gov

What this trial studies

The GEOLynch cohort study focuses on individuals with Lynch syndrome, a genetic condition that increases the risk of certain cancers. Participants are asked to complete questionnaires regarding their lifestyle, diet, and health, and provide biological samples for genetic analysis. The study aims to understand how genetic, environmental, and lifestyle factors contribute to tumor risk in this population. It has been ongoing since 2006, with both new and previous participants contributing data and samples for future research.

Who should consider this trial

Good fit: Ideal candidates are individuals aged 18 to 80 with a confirmed mutation in genes associated with Lynch syndrome.

Not a fit: Patients with additional hereditary cancer syndromes, chronic inflammatory bowel disease, or severe mental conditions may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved risk assessment and prevention strategies for individuals with Lynch syndrome.

How similar studies have performed: Other studies have shown success in understanding cancer risks in hereditary syndromes, making this approach promising.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Persons with a known mutation in a gene that causes Lynch syndrome, i.e. with an inherited monoallelic pathogenic germline mutation in either the MLH1, MSH2, MSH6, PMS2 or EPCAM gene.
* Aged between 18 and 80 years at inclusion.

Exclusion Criteria:

* Additional carrier of another hereditary colon cancer predisposition syndrome (e.g. FAP)
* (Chronic) Inflammatory bowel disease
* Non-Dutch speaking
* Dementia or another mental condition that makes it impossible to fill out questionnaires
* Terminally ill persons

Where this trial is running

Wageningen

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.

View on ClinicalTrials.gov →

Conditions: Lynch Syndrome, Neoplasms, Hereditary Nonpolyposis Colorectal Cancer, Colorectal Neoplasms, Lifestyle, Nutrition

Last reviewed 2026-05-15 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.