Breast Cancer after Reduction

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.  

[Cleveland Clinic]

Dear smiles35:  A personal history of breast cancer is a risk factor for developing a second breast cancer.  However, having had reduction surgery, there may be other anatomical changes in the breast (including scar tissue) that could feel like a lump.  It is important to follow up with your doctor and have the lump evaluated.  Without evaluation, we cannot speculate on what this might be.

[boninclyde]

It could just be scar tissue. See the doctor soon.