Sarah Sammons
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Sarah Sammons: ctDNA Is Here – SABCS 2025

Sarah Sammons, Breast Medical Oncologist at Dana-Farber Cancer Institute, shared on X:

CtDNA is here and SABCS25 confirmed it.

Sure we don’t know yet what to do with positive ctDNA and studies are needed. But patients want a better understanding of risk than we currently provide.”

Sara Tolaney, Chief of the Division of Breast Oncology at Dana-Farber Cancer Institute, shared this post, adding:

“NSABP B-59/Gepardouze ctDNA substudy (Exact sciences assay) n=212

  • BL 96% MRD positive
  • Post NAT: 9%
  • Post surgery: 6%

30-fold increase risk of distant recurrence if MRD positive post surgery.

95% of pts MRD negative post surgery remain free of disease at 3 years.”

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