Hello there,
Medullary sponge kidney is a condition in which cysts develop in the urine collecting ducts and tubules of one or both
kidneys. The exact cause is not known. The common symptoms are pain in the back, haematuria, excessive amount of calcium in the urine. The complications are kidney stones, infection and kidney failure. Treatment is usually symptomatic. It is best to consult an urologist and get your doubts clarified. Do keep me posted with more queries.
Best wishes and regards!