ERBB2 and neoplasm: In the triple-negative subgroup (ER–/HER2–), the number of nests showed a certain trend (HR 1.45, 95% CI 0.96 to 2.18; p = 0.078; Fig. 4a), whereas grade and tumour size showed no prognostic correlation with survival (both p = 0.2) in this relatively small subset (n = 69).