ctDNA Clearance Improves Prediction of Relapse Risk in Urothelial Cancer

“I think [the results] are hypothesis-generating, as we know that some patients will not benefit from neoadjuvant therapy and the goal of this work is to try to identify patterns among those who may not need treatment,” he said.

Of the patients with ctDNA analysis, “only those who were ctDNA-positive at baseline relapsed, [as well as] those who were ctDNA-positive following cystectomy, so I think [the possibility that a lack of detectable ctDNA prior to the start of therapy could suggest that the patient may not need or benefit from neoadjuvant therapy] is an interesting hypothesis that has come from this work,” Dr. Young said.

Overall, the findings show that, “in ctDNA-positive patients, increased immune signals appear to be associated with better outcomes with atezolizumab,” he concluded.

“Combining immune and circulating biomarkers may be required to accurately predict response to therapy,” Dr. Young added.

The ABACUS trial was supported by Roche.