My three year old had reflux surgically corrected when she was two. In a follow-up ultrasound her pediatric urologist found a cyst on her kidney that was growing. He knew it was growing because he returned to her pre-surgical films and found the previously undetected cyst, very tiny at the time.
I have read alot about kidney cysts (from your site and others) and it appears that simple kidney cysts in children are very rare. Is this true? Do you have any statistics on this subject? We hope that hers is a simple kidney cyst but also want to be well-prepared for dealing with the possibility or probability of polycystic kidney disease if necessary.
Thanks for your time.
Cystic disease of the kidney represents one of the most frequent malformations found in pediatric autopsy material. In a series of postmortem examination of infants, 136/6521 had renal cystic disease (2%). Renal cysts are abnormal dilations of either renal tubules, ducts, or glomerular capsules or are diverticulum-like structures possibly in continuity with the nephron. All renal cysts originate from microscopic renal tubules by proliferation of renal epithelial (surface) cells and accumulate fluid. Renal cystic disease can involve both kidneys as in autosomal dominant polycystic kidney disease(APKD), one part of both kidneys as in medulary sponge kidney, or just one kidney or part of it as multicystic kidney. Finally, simple cysts can occur alone or together anywhere in the kidney.
If your child only has one cyst, she does not have APKD. I think periodic ultrasound examination is probably the best way to follow your daughters cyst. If at anytime the cystic make-up changes or it becomes septated, further studies may be necessary. The only reasons to drain the cyst would be pain or bleeding. If these do not occur, surveillance ultrasound is the way to go.
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