Cysts, or abnormal pockets of fluid filled sacs, are a common finding on imaging studies like ultrasounds that are done on the kidney. I often see concerned patients in consultation about this finding. The question in that situation is...should you be worried if you discovered that you have cyst/s in your kidney? HOW COMMON ARE KIDNEY CYSTS? Cysts in the kidney are a pretty common occurrence. They tend to get more prevalent in the older age groups. For instance, 11.5% of individuals aged 50-70, and 22.1% of all individuals aged over 70 yrs will have at least one cyst in the kidney . However, the challenge is to identify whether it is a benign age related finding or something as serious as cancer (which can present as cysts). Cysts often will have no symptoms, and will usually be discovered incidentally as part of imaging of the kidneys for unrelated reasons.