Redefining HER2 Detection: Precision Proteomics Illuminates Hope for Ultra-Low Expressing Breast Cancer
The therapeutic landscape of HER2-positive breast cancer continues to evolve—from positive to low and now ultra-low expression categories. Trastuzumab deruxtecan has redefined HER2-targeted therapy, extending clinical benefit to broader patient populations. This evolution, however, underscores the need for greater precision and consistency in HER2 assessment. Mass spectrometry-based clinical proteomics provides an advanced, quantitative, and reproducible solution that complements conventional IHC, enabling more accurate patient stratification and guiding the next generation of precision oncology.