Idc in 1 breast...What is the percentage & time frame of getting cancer in other breast?

Can be hard to tell. A 2010 study looked at 100 cases of invasive ductal carcinoma and 50 cases of mixed ductal-lobular carcinoma. Mri was done on the opposite breast in 12 women, in each group. Mri found no cases of breast cancer in the opposite breast in the idc group, and found 1 case of in-situ (not invasive) breast cancer in the mixed ductal-lobular group. An oncologist can help look at studies for more results.
1 to 2 % per year. A woman who had a breast idc in one breast, has a 1 to 2 % chances per year of developing a second breast cance in her opposite breast.