Blood and Stool Sample Collection in Subjects Participating in Colorectal Cancer Screening: Act Bold


About this study

The primary objective of this study is to collect de-identified, clinically-characterized stool and whole blood specimens for use in developing and evaluating the performance of new biomarker assays for detection of colorectal cancer (CRC).

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. If you need assistance understanding the eligibility criteria, please contact the study team.

Inclusion Criteria: 

  • Subject is male or female.
  • 40 years of age or older. 
  • Subject is at average or increased risk for development of colorectal cancer (CRC). 
  • Subject presents for screening or surveillance colonoscopy. 
  • Subject has no symptoms that require immediate, or near term, referral for diagnostic or therapeutic colonoscopy. 
  • Subject understands the study procedures and is able to provide informed consent to participate in the study and authorization for release of relevant protected health information to the study Investigator.

Exclusion Criteria: 

  • Any previous cancer diagnosis (with the exceptions of basal cell or squamous cell skin cancers) and/or cancer related treatment (e.g., chemotherapy, immunotherapy, radiation, and/or surgery) within the past 5 years. 
  • Subject has a diagnosis or personal history of any of the following conditions, including:
    • Familial adenomatous polyposis (also referred to as "FAP", including attenuated FAP and Gardner's syndrome). 
    • Hereditary non-polyposis CRC syndrome (also referred to as "HNPCC" or "Lynch Syndrome"). 
    • Other hereditary cancer syndromes including but are not limited to Peutz-Jeghers Syndrome, MYH-Associated Polyposis (MAP), Turcot's (or Crail's) Syndrome, Cowden's Syndrome, Juvenile Polyposis, Neurofibromatosis and Familial Hyperplastic Polyposis.
  • Subject has a family history of: 
    • Familial adenomatous polyposis (also referred to as "FAP"). 
    • Hereditary non-polyposis CRC syndrome (also referred to as "HNPCC" or "Lynch Syndrome"). 
  • Subjects with Cronkhite-Canada Syndrome. 
  • IV contrast (e.g., CT and MRI) within 1 day [or 24 hours] of blood collection. 
  • Subject has any condition that in the opinion of the Investigator should preclude participation in the study.

Participating Mayo Clinic locations

Study statuses change often. Please contact us for help.

Mayo Clinic Location Status Contact

Rochester, Minn.

Mayo Clinic principal investigator

John Kisiel, M.D.

Open for enrollment

Contact information:

Cancer Center Clinical Trials Referral Office

(855) 776-0015

More information


Publications are currently not available

Study Results Summary

Not yet available

Supplemental Study Information

Not yet available


Mayo Clinic Footer