BRCA1 and breast cancer: These results corroborate previous findings on the pathogenic mechanism of BRCA1/2, which indicate immune activation and nuclear morphological heterogeneity in BRCA1/2‐mutated breast cancers.[26] Notably, although the use of HoverNet may introduce some bias, since our data are external datasets for HoverNet, any errors or biases introduced by HoverNet are generally uniformly distributed across the slides of both mutation and non‐mutation patients, without significant specificity.