<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi, I am 45 yrs old male, have a medical history of Ca of Urinary bladder, operated in 2006 and implanted neobladder prostrate removed. In a recent routine CT scan of whole abdomen, report states : The report states as under : Both kidneys are normal in size and show good symmetrical cortical enhancement . Right kidney shows lobulated outline with few simple cortical cysts. considering my medical history, pls advise me hat is this? is there any need to worry? what could be the treatment?best regardsPradeep Sharma YYYYYY  <response>: Hello Thanks for writing to ChatDoctorYou shouldnt worry at all. Cortical cyst is a very common type of kidney cyst. As it is located at the renal cortex, it is called as cortical cyst. It is a fluid-filled sac growing in the outer area of the kidneys. Exact cause is not known. It might be caused by infections, injuries or genetic issues. Usually very small cysts dont cause any problem. If the cyst grows larger, patient might have pain or pressure in back or sides. You need dietary and lifestyle Changes. Take less sodium in your diet and avoid spicy, fried food. You need follow up scan and proper treatment depend upon size, symptoms etc. Hope I have answered your question. Take Care Chat Doctor. 