Where Do You Start When Searching for Exceptional Responders? By Richard Tsai Before 2012, if a cancer clinical trial had only one successful remission amid a field of failures, the drug under trial was thought to be unsuccessful. We weren’t asking a key question: What made it work for that one participant? The one remission was an exceptional responder. Exceptional responders are in every clinical trial, but until whole genome sequencing (WGS) became available, it was impossible to scrutinize them. In 2012, researchers at Memorial Sloan Kettering used WGS to learn what caused the remarkable and durable [...]