Hi, my daughter was diagnosed with a non specific cortical cyst in her left kidney, upper pole when she was 6yrs old, she is now 15 yrs old and yearly US was done to monitor the kidney. In 2011 both kidneys were found with cysts, and last yr s result showed smaller cysts on the left. We just had our result for this yr and it showed only 1 cyst on the left upper pole , and new mild right sided pelviectasis decreased post void. Question: Is it normal for the smaller cysts to resolve over the yrs? Cyst size is 1.3 cm. Thank you. Would appreciate your response. -