BRCAness describes tumours that possess histopathological and molecular characteristics similar to those found in patients with germ-line BRCA1 or BRCA2 gene defects, including a distinctive DNA repair defect arising from loss of Homologous Recombination (HR) and drug sensitivity effects associated with this HR defect, including exquisite PARP inhibitor sensitivity6. This evidence concerns the gene BRCA1 and neoplasm.