I was at my great aunt's 90th birthday party on Tuesday and was chatting with a neighbor. He mentioned that after being treated for kidney stones he couldn't speak for 6 months.My face screwed up as I tried to figure out what the hell he was talking about. His next sentence explained everything.
What happened?
Other hints: his stone were conventional calcium oxalate stones, and he had recurrent stones.
I'll leave the answer later today or tomorrow.