I was diagnosed with Breast Cancer in 1993 after a mammogram showed that a lump that I had had for at least 3 years had turned suspicious. A lumpectomy followed by chemo and radiation left me cancer free. In 2004 I discovered a lump under that breast which turned out to be a Sarcoma caused by the radiation during treatment. It was removed but grew back in 2006 and was removed again this time for good. (Just an aside but while I was waiting for surgery for the Sarcoma I discovered I had Rectal Cancer---Cancer free now)
A Mammogram saved my life but please also check for lumps under your breast which do not show up on the Mammograms.
Calgary, Canada