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Abstract
Tumor data from the ABCSG 5 trial of chemotherapy versus endocrine therapy for premenopausal ER+ breast cancer supports molecular subtyping by Ki-67 IHC as a prognostic marker. But while this tissue was handled uniformly, Ki-67 testing overall is unstandardized, complicating clinical utility. Increasing potential biomarkers herald more challenges in biomarker validation.
See related article by Bago-Horvath et al., p. 5682
Footnotes
Clin Cancer Res 2020;26:5543–5
- Received July 10, 2020.
- Revision received July 20, 2020.
- Accepted August 25, 2020.
- Published first August 28, 2020.
- ©2020 American Association for Cancer Research.
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