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Diagnostic, Oncogenic evidence:
Diagnostic: The study identifies the ETV6-NTRK3 fusion gene as a specific genetic alteration in secretory breast carcinoma (SBC), indicating its role in defining and confirming this subtype of breast cancer. The presence of the fusion gene was assessed using FISH assays, which further supports its use as a diagnostic marker for SBC.
Oncogenic: The abstract mentions that the biological consequence of the ETV6-NTRK3 translocation is the expression of a chimeric protein tyrosine kinase with potent transforming activity, suggesting that this somatic variant contributes to tumor development or progression in SBC.