Judge Alan Lourie of the U.S. Court of Appeals for the Federal Circuit. Photo: Diego M. Radzinschi/ALM

The Federal Circuit has held patents on a noninvasive test for detecting organ transplant rejection ineligible for patent protection.

CareDx v. Natera is the latest instance of medical diagnostic patents being rejected on eligibility grounds. It will probably result in yet another push for review of the Alice/Mayo eligibility test by the U.S. Supreme Court.