question: My doctor ordered an ultra sound for both breasts after my mammogram showed density in my right breast and a nodule in my left breast. I am 80 years old and went through surgery for uterine cancer and subsequently chemo in 2010. I didn t finish my chemo at the oncologist s suggestion as it was doing a lot of damage to other parts of my body. I worked until my 80th birthday and retired, not because I wanted to but because my health just wouldn t let me continue. I just don t know if I can handle having cancer again. What percentage of dense breasts and nodules are cancer?