I am 35 with no family history of breast cancer...however, I had a mastecomy in April 2006, for breast cancer discovered in my left breast. The was no sign in my lymphnodes. I went thru 12 weeks (4 sessions) of chemo, in August it was decided that I would not need radition, in Sept 2006 I received a reduction on my right brest. Now I have a lump in the right breast. What is the chances of cancer appearing in the right breast after the treatment.