TEST:

HER2DX

The ERBB2 score correlated with HER2 immunohistochemical intensity. In this exploratory real-world cohort, HER2DX provided biologically distinct information beyond traditional immunohistochemistry and was associated with modifications in multidisciplinary treatment decision-making in early-stage HER2-positive breast cancer, warranting prospective validation in larger cohorts.

Emerging approaches, including liquid biopsy, AI, and multi-omics integration, offer dynamic insights but require prospective validation. Future progress depends on assay standardization, equitable access, and validation within adaptive clinical trial frameworks, supporting integrated molecular - clinical and AI-enhanced models for personalized therapy.

"REVEAL GENOMICS...has announced the publication of new research in npj Precision Oncology demonstrating that its HER2DX and DNADX assays are associated with clinical outcomes to trastuzumab deruxtecan (T-DXd) in metastatic breast cancer."

Conversely, HER2 immunohistochemical subtypes showed limited predictive value for clinical outcomes. Additionally, elevated TOPO1 expression was associated with worse outcomes with T-DXd in HER2-negative breast cancer, suggesting potential relevance for payload-related markers in predicting T-DXd performance.

P2/3, N=224, Recruiting, Fundacio De Recerca Clinic Barcelona-Institut DInvestigacions Biomediques August Pi I Sunyer

In conclusion, the HER2DX ERBB2 mRNA score provides independent prognostic information in HER2+ advanced breast cancer treated with THP. The HER2DX metastatic prognostic score further improves prognostic accuracy.

Physician confidence improved (P < 0.001) and the estimated total cost savings, including direct drug costs, vein access devices, and HER2DX costs, amounted to €98 031. HER2DX impacts clinical management in stage I-III HER2-positive BC by supporting treatment adjustments, enhancing physician confidence, maintaining pCR rates, and reducing health care costs.

The patient subsequently received adjuvant chest wall and nodal region radiotherapy plus trastuzumab-emtansine (T-DM1). This case underscores the value of personalized, multidisciplinary management in PrBC, particularly in patients with high-risk biologic features and advanced nodal disease. Integrating clinical judgment, genomic tools, and adaptive strategies, while accounting for gestational limitations, can optimize oncologic outcomes without compromising fetal safety.

Similarly, while clinical factors and imaging tools may help identify early on patients at higher risk of experiencing TIC, no cardioprotective strategy has yet demonstrated robust and conclusive benefit. Despite the emergence of newer anti-HER2 agents and evolving treatment paradigms, trastuzumab will probably continue to serve as a key therapeutic backbone, especially for patients with lower risk HER2+ eBC.

HER2DX reflects key biological and pathological features of HER2+ breast cancer and independently predicts pCR, supporting its utility for individualized treatment decision-making.

HER2DX offers prognostic value and may guide chemotherapy use in older patients with HER2-positive early breast cancer. Clinical Trial Information NCT01104935.