The second in frequency BRCA2 frameshift mutation c.5851_5854delAGTT, located in exon 11, was found in two patients (1 %): BC76 with a family history of BC and stomach cancer, diagnosed with TNBC at the age of 53, and BC58 with family history of BC and CRC, diagnosed with BC at the age of 48 (Table 4). The gene discussed is BRCA2; the disease is breast cancer.