I had a gall stone the size of a small chicken egg. They still managed to get it out through a minute hole...along with the bag. I was one of the first to have it done that way.
I can't tell you how ill I was with that, but imagine, having taken enough Pethidine to quiet a village, yet it still felt like someone was jumping on my chest and thrusting a spear under my rib cage and out my back. Blue light job, once they could agree on the cause. Don't miss the gall bag at all.
Search Loose rivets and 'gall stones' 'at any time'...I've said quite a bit about it in the past.