ERBB2 and neoplasm: We found that the proportion of luminal B tumours was also significantly higher in ATM-associated tumours than in the Norwegian study (PFET = 0.03) and in the TCGA series (PFET = 0.02), whereas the prevalence rates of luminal B/HER2+ tumours and of triple-negative breast tumours in the two latter series were similar to those observed in ATM-associated tumours (Fig. 1).