Hi,
There are no known causes of breast cancer. Only some definite and some other risk factors are known.
You could read up information on -
http://www.cancer.org/docroot/CRI/content/CRI_2_2_2X_What_causes_breast_cancer_5.asp
Let us know if you have any other doubts.
Regards.
Wouldn't it be wonderful if we knew the answer to that one ?? If we knew, then it would be eliminated in hort order. There are a number of risk factors but that's all. Each case is treated on an individual basis but drugs and other advances are appearing daily.