I have them as well and it's quite common in women. It's important you get a 'BASE MAMMOGRAM' so the next time you go in for your next Mammopgram they will compare it to your base one and see if there are any differences between the two xrays. If there is then you'll be sent for a scan, but don't panic. I had a change and had the scan done and it was just another nodule (or cyst.) DON'T drink too much caffeine and when you go for the Mammogram DON'T drink ANY caffeine for at least 10 hours before the xray.