This BX‐Neu+ cohort was used to evaluate whether intratumoural levels of Ncaph were associated with heterogeneous breast cancer outcome, demonstrating that high intratumoural Ncaph RNA levels were associated with shorter tumour latency and survival (Figure 4B,C), faster tumour growth, and larger tumour volume (Figure 4D,E). Here, ERBB2 is linked to breast carcinoma.