More than 30 years ago during scans for something else, benign cysts were found on my liver. It concerned me of course and I remember well the doctor telling me that if he took 100 random people off the street and scanned them, 20 would have cysts. That gave me some comfort at the time. Since then, they have occasionally been identified incidentally in various scan reports. I understand that if changes were noted, they'd investigate further. It's good yours have been identified so you now have a baseline and the medics are keeping an eye on them for changes. Try not to worry. Easier said than done, I know. 