Experimental Factor Ontology id EFO_0009443 (BRCAX breast cancer) is breast cancer occuring in women with a family history indicative or being a BRCA1 or BRCA2 mutation carrier, but genetic screening for these genes has failed to find clinically significant mutations. Also known as: BRCA1/2 negative familial breast cancer, BRCA1/2 negative high risk breast cancer, BRCA1/BRCA2 negative familial breast cancer, BRCA1/BRCA2 negative high risk breast cancer, non-BRCA familial breast cancer.