With a simple google search you can find out lot of information. I'm not a doctor, but from what I know, breast cancer is treatable if detected early. Surgery, Chemotherapy and Radiation Therapy are some of the treatments (those treatments are common to most cancers).
If you are asking just to know, then you can find out from the internet. But if you are asking for a serious reason, then go meet a doctor. Don’t rely on forums or web sites for medical advice .
Please channel a doctor... He will direct you to an appropriate one. Please do not do "Goda wedhakam" for such thing. As far as I know it is now curable. I think there's a test called "mamogram" or something. Think it's from Nawaloka hospital. Please channel a doctor.