BRCA1 and breast neoplasm: We found that 52% (11/21) of the BRCA1-mutated tumors and 57% (12/21) of the BLBCs have complex/truncating TP53 mutations, which is significantly more than the 8% (1/13) and 7% (2/31) of the luminal-J and luminal-H tumors, respectively (p = 1 × 10-2 and p = 8 × 10-5 respectively; two-tailed Fisher's Exact test, Figure 1 Additional File 2), indicating that this feature is common in hereditary BRCA1-mutated breast tumors and non-hereditary BLBCs.