FDA Expands Approval of Cancer Liquid Biopsy - Cancer Currents Blog National Cancer Institute sent this bulletin at 11/30/2020 10:33 AM EST Having trouble viewing this email? View it as a Web page. You are subscribed to Cancer Currents: An NCI Cancer Research Blog from the National Cancer Institute. Recent posts are listed below. Cancer “Liquid Biopsy” Blood Test Gets Expanded FDA Approval 11/30/2020 FDA has expanded the approved uses of the FoundationOne Liquid CDx blood test, known as a liquid biopsy, that can help doctors pick specific treatments for some people with cancer. When used in this way, the test is known as a companion diagnostic.