ERBB2 and cancer: The longest estimated 5- and 10-year BCSS were observed in luminal A-like cancers (99.6 and 97.9%, respectively), while the worst 5-year BCSS was observed in the TNBC subgroup (85.6%) and the worst 10-year BCSS was seen in the luminal B-like (HER2 positive) subgroup (80.6%).