In BC subtype, higher number of fusions was observed in pCR group compared to non-pCR group (p = 0.031) in HR-HER2 + BC subgroup (Fig. 5d) whereas HER2-enriched intrinsic subtype with pCR had lower fusions compared to those with non-pCR (p = 0.021) (Supplementary Fig. 1C). This evidence concerns the gene ERBB2 and breast cancer.