Shield Post-Approval Study Protocol

Recruiting now

Conditions studied: Colo-rectal Cancer

In brief

The Shield post-approval study (PAS) is a prospective, longitudinal study supplemented with Real World Evidence (RWE) to evaluate the longitudinal performance of Shield in an average risk population at a second round of testing for individuals between the ages of 45 and 81 at average risk of CRC using colonoscopy as the reference method.

Key facts

Study ID

NCT06880055

Run by

Guardant Health, Inc.

People needed

3375

Starts

2025-07-14

Expected to finish

2030-12-01

Last updated by the study team

2026-08-07

Who can join

Age: 45 and older, up to 81. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Subjects aged 45-81 years at time of consent
• Intending to undergo a standard of care Shield test
• Considered by a physician or healthcare provider as being of 'average risk' for CRC; 'Average-risk' individuals in the context of CRC screening are defined as those who do not have symptoms of CRC and do not have increased risk factors for the disease (i.e., prior diagnosis of CRC, adenomatous polyps, or inflammatory bowel disease; family history of CRC or known hereditary predisposition to CRC).
• Subject agrees to comply with study procedures and associated standard of care assessments.

You may not qualify if…

• Undergoing colonoscopy for investigation of symptoms
• Personal history of colorectal cancer (CRC), adenomas, or other related cancers
• Family history of CRC, defined as having one or more first-degree relative (parent, sibling, or child) diagnosed with CRC at any age
• Positive result on another colorectal cancer screening method within the last six months, or:
• 12 months for fecal occult blood test (FOBT) or fecal immunochemical test (FIT)
• 36 months for FIT-DNA test
• Personal history of any of the following high-risk conditions for colorectal cancer:
• Inflammatory Bowel Disease (IBD), including chronic ulcerative colitis (CUC) and Crohn's disease
• Familial adenomatous polyposis (FAP)
• Other hereditary cancer syndromes including but not limited to:
• Hereditary non-polyposis colorectal cancer syndrome (HNPCC) or "Lynch Syndrome", Peutz- Jeghers Syndrome, MUTYH Polyposis (MAP), Gardner's Syndrome, Turcot's (or Crail's) Syndrome, Cowden's Syndrome, Juvenile Polyposis, Cronkhite-Canada Syndrome, Neurofibromatosis and Familial Hyperplastic Polyposis
• Positive Shield test result within the previous 3 years
• History of any malignancy (patients who have undergone surgical removal of skin squamous cell cancer may be enrolled provided the procedure was completed at least 12 months prior to the date of provision of informed consent for the study)
• Known diagnosis of inflammatory bowel disease
• Currently taking any anti-neoplastic or disease-modifying anti-rheumatic drugs (DMARDs)
• Any major physical trauma (e.g., disruption of tissue, surgery, organ transplant, blood product transfusion) within the 30 days leading up to the provision of informed consent
• Known medical condition which, in the opinion of the Investigator, should preclude enrollment into the study
• Participation in a clinical research study in which an experimental medication has been administered or may be administered within the 30 days leading up to providing informed consent or may be administered through the time of colonoscopy

Where it is running

• Southeast Valley Gastroenterology Consultants — Chandler, Arizona, United States (enrolling)
• GI Solutions of Illinois — Chicago, Illinois, United States (enrolling)
• Alliance Research Institute, LLC — Canoga Park, California, United States (enrolling)
• Southeast Valley Gastroenterology Consultants — Gilbert, Arizona, United States (enrolling)
• Elite Primary Physicians, Inc. — Anaheim, California, United States (enrolling)
• Desert Oasis Healthcare Medical Group — Palm Springs, California, United States (enrolling)
• Amicis Research Center — Sherman Oaks, California, United States (enrolling)
• Amicis Research Center — Valencia, California, United States (enrolling)
• Coral Clinics — Winnetka, California, United States (enrolling)
• Digestive Disease Associates — Branford, Connecticut, United States (enrolling)
• Amicis Research Center — Granada Hills, California, United States (enrolling)
• Gastroenterology Consultants of Boca Raton, LLC — Boca Raton, Florida, United States (enrolling)
• Manuel Espinel MD PA — Delray Beach, Florida, United States (enrolling)
• Innova Pharma Research, LLC — Doral, Florida, United States (enrolling)
• Marisela Gonzalez, MD — Miami, Florida, United States (enrolling)
• Research Associates of South Florida, LLC — Miami, Florida, United States (enrolling)
• Florida South Research Phase I-IV, Inc. — Miami, Florida, United States (enrolling)
• Physicians Group of South Florida — North Miami, Florida, United States (enrolling)
• NMC Research — Tampa, Florida, United States (enrolling)
• Digestive Disease Consultants — Bourbonnais, Illinois, United States (enrolling)
• Digestive Disease Consultants — Bourbonnais, Illinois, United States (enrolling)
• Christie Clinic — Champaign, Illinois, United States (enrolling)
• Digestive Disease Associates — Branford, Connecticut, United States (enrolling)
• GI Solutions of Illinois — Chicago, Illinois, United States (enrolling)
• Digestive Health Services — Downers Grove, Illinois, United States (enrolling)

Full record on ClinicalTrials.gov

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