question: I have a large anechoic cyst in my right kidney, last year it had reached 10cm by 8cm by 5cm. Thr doctor sent me to hospital to have cyst aspirated, they could only get some fluid out leaving about 1/2 size. Last week I had another ultrasound and the cyst has increased to 13.3 x 7.2 x 7.1. My doctor does not seem to be concerned. What do you think I should do about this?