Hi Nans4, I also had an abnormal mammo some years ago when I was in my 50's. They said it looked like fibrous tissue. This was before the newer mammos which are now digital so they did a needle biopsy. It was fibrous tissue and I was told not to drink a lot of caffeine. (I don't! And I never did anyway.) But today they have much better equipment to read what's going on in there. If you can ask for a digital screening, maybe that would be helpful. Look at this link:
www.breastcancer.org/symptoms/testing/types/dig_tomosynthGood luck!