FDA Warns Liquid Biopsy Maker

The agency fires off a letter to Pathway Genomics, telling the company that its new cancer detection test could harm the public and is not validated by science.

Written byBob Grant
| 2 min read

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WIKIMEDIA, MDOUGMThe US Food and Drug Administration (FDA) has a clear message for the CEO of Pathway Genomics, the company that just unveiled a blood test that it claims can detect various cancer types: “[Y]ou are offering a high risk test that has not received adequate clinical validation and may harm the public health,” the agency wrote in a letter to Pathway’s founder and CEO Jim Plante this week (September 21). The FDA has given Plante two weeks to respond and set up a time to meet with the agency.

The FDA claims that Pathway’s CancerIntercept Detect, which costs $699, counts as a direct-to-consumer test because it ships blood collection tubes, technically considered to be medical devices, straight to customers. This, according to the agency, means that the company needs to get FDA approval before offering the test, something Pathway did not do. But Pathway disputes this contention. “We assure that there is physician involvement in the ordering, review, and follow-up of CancerIntercept testing,” the company said in a statement emailed to Bloomberg Business.

Pathway also refutes the FDA’s assertion that there is no published validation for the test as a screening tool for cancer in high-risk individuals. “We believe we have performed appropriate validation of the test as a laboratory-developed test, and we are ...

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Meet the Author

  • From 2017 to 2022, Bob Grant was Editor in Chief of The Scientist, where he started in 2007 as a Staff Writer. Before joining the team, he worked as a reporter at Audubon and earned a master’s degree in science journalism from New York University. In his previous life, he pursued a career in science, getting a bachelor’s degree in wildlife biology from Montana State University and a master’s degree in marine biology from the College of Charleston in South Carolina. Bob edited Reading Frames and other sections of the magazine.

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