PALO ALTO, CALIF. -- Guardant Health, Inc. (Nasdaq: GH), a leading precision oncology company, today announced the U.S. Food and Drug Administration (FDA) has approved the company’s Shield™ blood test for colorectal cancer (CRC) screening in adults age 45 and older who are at average risk for the disease. It is the first blood test to be approved by the FDA as a primary screening option for CRC, meaning healthcare providers can offer Shield in a manner similar to all other non-invasive methods recommended in screening guidelines. Shield is also the first blood test for CRC screening that meets the requirements for Medicare coverage.[1]

Colorectal cancer is the second-leading cause of cancer-related death in the U.S., even though it is highly treatable if caught early.[2] The American Cancer Society estimates that more than 150,000 people will be diagnosed with CRC in 2024 and the disease will be responsible for more than 53,000 deaths.[3] More than three out of four individuals who die from CRC are not up to date with their screening.[4] Early detection is critical. When colon cancer is found at an early stage before it has spread, the five-year relative survival rate is 91%. If the cancer has spread to distant parts of the body, the five-year relative survival rate is 14%.[5]

The CRC screening rate in the U.S. is only about 59%, which falls well below the National Colorectal Cancer Roundtable’s goal of 80% for eligible individuals.[6] More than one out of three eligible Americans - over 50 million people - do not complete CRC screening, often due to the perception that other available options, such as colonoscopy or stool-based tests, are invasive, unpleasant or inconvenient.[7]

“The persistent gap in colorectal cancer screening rates shows that the existing screening options do not appeal to millions of people,” said Daniel Chung, MD, gastroenterologist at Massachusetts General Hospital and Professor of Medicine at Harvard Medical School. “The FDA's approval of the Shield blood test marks a tremendous leap forward, offering a compelling new solution to close this gap. This decision will help make screening tests more broadly accessible and propel blood-based testing and CRC screening into a new era. With increased screening rates and early cancer detection, many more lives can be saved.”

The Shield blood test is the result of over 10 years of research and development, including collaboration between Guardant Health and leading health organizations globally. Since the commercial introduction of the LDT (laboratory developed test) version in May 2022, the overall adherence rate for the Shield test has been more than 90%, meaning more than 90% of patients who were prescribed the test in a real-world clinical setting completed it.[8] In contrast, studies show only 28-71% of patients who are prescribed other screening methods, such as colonoscopy or a stool test, complete them.[9]-[12] Primary care physicians can have patients complete a Shield test with a simple blood draw during a routine office visit, providing a convenient and more pleasant alternative screening method that doesn’t require the special preparation, dietary changes, time and discomfort associated with colonoscopy or the unpleasantness of handling stool.

“The FDA approval of the Shield test is a significant victory for patients and an important milestone in Guardant Health’s mission to conquer cancer with data. Shield can help improve colorectal cancer screening rates so we can detect more cancers at an early stage, when they are treatable,” said AmirAli Talasaz, Guardant Health co-CEO. “We are now getting ready to launch this test in the near future and are very excited to empower physicians with a viable blood-based screening option to tailor the screening regimen to the unique needs of their patients.”

The FDA decision follows a strong recommendation for approval by an Advisory Committee panel in May 2024. The approval was based on results of ECLIPSE, a 20,000+-patient registrational study evaluating the performance of the test for detecting CRC in average-risk adults. Designed to reflect the diverse population of the U.S., the study was conducted at more than 200 clinical trial sites in rural and urban communities across 37 states. Results from the study, published in the March 14, 2024, issue of The New England Journal of Medicine, showed that Shield demonstrated 83% sensitivity for the detection of CRC, with 90% specificity for advanced neoplasia. This performance is within range of current guideline-recommended non-invasive screening methods, in which overall CRC sensitivity ranges from 74% to 92%.[13]

“In addition to performance, a screening test’s value should be measured by how accessible it is, and how likely people are to use it,” said Michael Sapienza, CEO of the Colorectal Cancer Alliance. “Guardant Health’s Shield test checks all three of these boxes and is truly a welcomed addition to the screening options currently available. Giving people choice, and offering a blood test that can reach those in harder-to-screen communities, will undoubtedly be a huge step forward in our battle against colorectal cancer.”

“This is a promising step toward making more convenient tools available to detect colorectal cancer early while it is more easily treated,” said William M. Grady, MD, a gastroenterologist at Fred Hutchinson Cancer Center. “The test, which has an accuracy rate for colon cancer detection similar to stool tests used for early detection of cancer, could offer an alternative for patients who may otherwise decline current screening options.”

“Most people in my situation know we’re supposed to get screened for colon cancer,” said Dennis Barnes, a 55-year-old attorney whose physician had recommended a colonoscopy. But despite his best intentions, he had never scheduled one. “It’s hard to find the time to schedule it if you have a busy life and a demanding job,” he said. When his doctor told him about Shield, he agreed to have the blood test and was fortunate to have the result come back normal. “I realized I had taken quite a risk by waiting so long to screen. The Shield test is a much more pleasant way to screen, and the convenience of it makes getting screened pretty much a no-brainer.”

“I was in for a routine physical and my doctor asked when I had my last colonoscopy,” said John Gormly, a 77-year-old business executive in Newport Beach, California. “I said it's been a long time, so he offered to give me the Shield blood test. A few days later the result came back positive, so he referred me for a colonoscopy. It turned out I had stage II colon cancer. The tumor was removed, and I recovered very quickly. Thank God I had taken that blood test.”