<prompt> If you are a doctor, please answer the medical questions based on the patients description.My mother had a kidney exam and we received following statement:IMPRESSION: Prominent bilateral renal pelves. Small postvoid residual. Left renal cyst.With the above, my mothers doctor says the above condition comes with aging and that the urinary residual needs no treatment. The kidney cyst also does not need treatment.Is my mothers doctors response true? Will everything just go away naturally with my mothers kidney condition?  <response>: Hello and welcome to Chat Doctor. As a Urologist, i can understand your anxiety. Kidney cysts are seen after forty to fifty years age, if theyre simple cysts. Prominent renal pelvis will need evaluation, if theres associated infection. The renal cyst doesnt need treatment, but till not go away naturally. Its harmless, as long as its uncomplicated and remains a simple cyst. Similarly, dont worry about the bilateral renal pelvic prominence. Wish you well. Chat Doctor. Manga. 