Hi, I am 59 y/o w/f. For over a month, I have been having a sore spot in my right breast. it is on the side, sort of above my rib cage. I do not feel any lumps.' There is not any hx of breast cancer on my maternal side, but there is on my paternal side. I had a mammogram Oct 2010 and it was good. I had a complete hysterectomy in 2005. What possibilities are there for this?