Hmmmm....good question. I will ask him. I am very lucky compared to some accounts I've read or seen on youtube. Younger women have had horrible stories and decades of suffering. My stones started showing themselves in 2018. My thyroid tests all came back in normal order but I will ask urologist too. I can't thank you enough for the suggestion and story about your relative. Thanks for sharing. Unfortunately, the medullary sponge disease will automatically make stones, according to research, the stones grow no matter what. Even all the diet control I place on myself will only be a slight bandaid, if that. My first experience is when the urologist did a cystoscopy as he was pretty certain the program was to be bladder cancer. His shock (and obviously mine too), was I had 18-20 kidney stones, hence, the months of gross hematuria. Crazy stuff that our bodies are born with! Thank you again!