HRD has been linked with genetic or epigenetic impairment of genes belonging to the BRCA-pathway such as BRCA1, BRCA2, PALB2 and RAD51B, RAD51C and RAD51D, but BRCA1 is the most frequently affected gene in TNBC (5, 6). The gene discussed is RAD51B; the disease is hypoparathyroidism-retardation-dysmorphism syndrome.