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Urinary and Genital Disorders (Children)

Cyst in Both Kidneys of Fetus

09/02/2009

Question:

At 23 weeks ultrasound, found renal cyst (bilateral calyceal renal size 5 - 6 mm) in both kidneys. The amniotic fluid level is normal. What does this mean? Does this mean kidney failure? What can I expect?

Answer:

I apologize, because from the information provided, it is impossible to provide much helpful information. If the "cyst" means the renal pelvis, then there is mild to moderate renal pelvic enlargement that needs to be monitored during pregnancy. If there are cysts in addition to renal pelvic enlargement, then the baby could have an inherited form of renal cystic disease. If the amniotic fluid volume is normal, that is a good prognostic sign right now for ultimate kidney function, but again, it needs to be monitored during the pregnancy.

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Response by:

Jack S Elder, MD, FACS, FAAP Jack S Elder, MD, FACS, FAAP
Clinical Professor of Urology
School of Medicine
Case Western Reserve University