City of Hope to Evaluate Quest Diagnostics' Haystack MRD® for Guiding Patient Management in Multiple Cancers

Fourteen City of Hope sites across the U.S. participating in research using the Haystack MRD ctDNA Test in patients with breast, colorectal, ovarian, and prostate cancer SECAUCUS, N.J. and LOS ANGELES, April 16, 2026 /PRNewswire/ -- Quest Diagnostics (NYSE: DGX), a leading provider of diagnostic information services, today announced that City of Hope, one of the largest and most advanced cancer research and treatment organizations in the United States, is implementing Haystack MRD®, a highly accurate circulating-tumor DNA (ctDNA) minimal residual disease (MRD) test, for clinical trial participants with solid tumor cancers to help guide disease management for patients being treated for breast, colorectal, ovarian and prostate cancer.