This is a perfect time to start flushing, before you get calcified stones.
More than 10 years ago I had also a shadow, to me it means there is not a calcified stone. Since I did not know about curezone, I never did anything about it.
I showed it to my chiropractor, he told me it is more dangerous to do surgery, then leave my gallbladder in.
I never did a Hida scan, I had a write up on it but I can't find it.
So start flushing and start eating the right food to prevent getting any stones.
I leave you a link from Spirit, who writes about preventing new stones.