One of the known causes of breast cancer is a breast cancer gene BCRA1. Finding the genetic marker BCRA1 gene can mean that someone has a greater breast cancer risk than someone who does not have the BCRA1 gene. Genetic testing or DNA testing is one way doctors can predict who may be at greater risk to develop breast cancer. Breast cancer is a major cause of death in women.

Basal-like subtype and BRCA1 dysfunction in breast cancers
Basal-like subtype and BRCA1 dysfunction in breast cancers Basal-like breast cancers are characterized by their unique expression profile, with the frequent loss of BRCA1, caused by such mechanisms
http://www.ncbi.nlm.nih.gov/pubmed/18946749...
BRCA1
BRCA1 What is the official name of the BRCA1 gene? The official name of this gene is “breast cancer 1, early onset.” BRCA1 is the gene's official symbol. The BRCA1 gene is also known by other n
http://ghr.nlm.nih.gov/gene=brca1