Is breast cancer inherited?

no ,not inherited .....must presence of reasons or environmental factors to appear the breast cancer 

There are many external and internal factors that can cause breast cancer and every woman may have it but women with a family history of breast cancer are more expected to have it. But there is no obvious evidence about inheritance causes.

10-15% breast cancer are familial, associated mainly with BRCA1, BRCA2. Although others mutations like P53 also contribute (<1% of familial breast cancer).

its not inherited... but induced by some factors

 

maybe yes can be inherted  if we talk about  abnormal breast cancer gene. Breast cancer due to an inherited gene abnormality tends to happen at an early age (under40), 

and also can't be  inherted becose of many factors and risks.....