It was a cloudy October morning, and Joseph E. Oesterling, MD, was in the exam room of his Saginaw, Michigan urology practice preparing for a procedure. Suddenly, the door burst open, and a federal agent...

The genomic landscape of circulating tumor DNA (ctDNA) was comparable to the landscape of tissue biopsies in a large study of patients with metastatic castration-resistant prostate cancer (mCRPC), according...