A landmark, real-world study in the U.K. has demonstrated that combining whole genome sequencing with clinical data enabled tailored cancer treatment and improved outcomes. At one health care center, having DNA sequence data led to changes from usual standard of care in 25% of cases. “Mostly, [patients] got into clinical trials; some got medicines they wouldn’t have got. Others avoided medicines because their genetic make-up suggested that if they were exposed to the medicines, they would be at risk of harm,” said Mark Caulfield, professor of clinical pharmacology at Queen Mary University of London, who is co-author of a paper outlining the findings in Nature Medicine, Jan 11, 2024.