Fergus Couch and colleagues report a genome-wide association study for modifiers of breast cancer susceptibility in BRCA1 mutation carriers. They identify a locus at 19p13 associated with breast cancer risk in BRCA1 mutation carriers, and further replication studies identify this locus as associated with estrogen receptor–negative breast cancer in the general population.
- Antonis C Antoniou
- Xianshu Wang
- Fergus J Couch
