<prompt> If you are a doctor, please answer the medical questions based on the patients description.i just had my ultrasound and need to know your professional objective opinion:ultrasound findings: right kidney: 10.0 x 5.3 cmleft kidney : 10.0 x 5.5 cmrenal contour is smooth. a thin-walled, fluid-filled anechoric focus is seen in the inferior aspect of the left kidney measuring 1.5 x 1.2 x 1.4cm. no evidence of renal stone. pelves and calyces a.re not dilatted.impression: normal sized kidneys with cyst on the left.generally, may i know what is this? do i need to undergo surgery to remove the cyst? your opinion will be much appreciated. thank you  <response>: Dear friend, Thanks for your query. I can appreciate your concerns. If you dont have any symptoms, such as, burningblood in urine, no pain in abdomen overlying the kidneys; no increase in frequency of urination, then you just relax. It is a benign simple cyst, for which no treatment or surgery is required. You are also not likely to have any problems except in rare condition when it ruptures due to blunt injury in which case, there may be some bleeding in urine. If you have high blood pressure, pl ensure that it is kept under control with Chat Doctor. HAVE A NICE DAY AND A SPEEDY RECOVERY. Fond 