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. -
Hi, Thanks for writing in. Cysts in kidney are to be monitored in child Chat Doctor.  This is to consider any condition associated with multiple cysts which may require early intervention and treatment. Small cysts which are less than a centimeter in diameter can resolve over years. The larger ones do not resolve usually. Since your daughter has cysts in both kidneys earlier, it is important to follow up regularly keeping in mind conditions which can cause multiple kidney cysts in early adult years. A single cyst 1.3 cm in diameter and pelviectasis on left side which decreased on post void is not a concern. Knowing if any family member on either parents side is important. This is because few conditions causing multiple cysts in both kidneys is transmitted through genetic inheritance.