I have medullary sponge kidney and previous kidney stones/infection/surgery on left side. currently i have at least two 8 mm stones, is it safe ignore?

See answer: Medullary sponge kidney is a common risk factor for kidney stones. That said, there is often an underlying metabolic problem contributing to stone formation and a 24-hour urine collection loking for such abnormalities is definitely recommended. Prevention is one goal, and eliminating any existing stone burden (especially >3-4mm) should be the other goal. Would recommend eswl for stone(s).