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What is the FoundationOne Liquid CDX test?

The FoundationOne Liquid CDx test is used to test the blood of patients with metastatic castration resistant prostate cancer or non-small cell lung cancer.

What is the difference between guardant360 and FoundationOne Liquid CDX?

Guardant360 CDx, made by Guardant Health, was approved as a companion diagnostic for osimertinib (Tagrisso), a lung cancer therapy. FoundationOne Liquid CDx, made by Foundation Medicine, was approved as a companion diagnostic for three lung cancer therapies and a prostate cancer therapy.

What's new with the expanded FDA approvals?

Under the expanded approvals, announced by FDA in late October and early November, the use of the test as a companion diagnostic has been broadened to people with other cancers and other drugs not covered by the original approval. (See table.)

How is cfDNA used in the treatment of non-small cell lung cancer?

The cfDNA is then separated from the plasma and mixed with chemical substances, called reagents, that find and test mutations in the MET gene. A medical professional reviews the results and sends a report to the patient’s doctor. The doctor uses this information to help manage the care of patients with non-small cell lung cancer.

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