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Urinary and Genital Disorders (Children)

Fluid detection around kidneys in fetal us.

12/10/2007

Question:

What could be the possible problems with seeing too much fluid around the kidneys of a boy fetus during a 24 week ultraosund?

Answer:

It usually means there is too much urine with the kidney rather than around it. That is called hydronephrosis. If it is severe, it is an indication that there could be a blockage between the ureters and kidneys, between the bladder and ureters, or of the bladder outlet itself. In addition, it could be a sign of urinary reflux, in which urine from the bladder flows in a backward direction into the kidneys. Or, it could be a combination of these issues. If the swelling is mild, it is probably not from a significant obstruction or blockage. Either way, it needs to be monitored closely, particularly if both kidneys are involved. As long as the amniotic fluid volume is normal, then the baby should be fine. Further tests will be necessary after delivery.

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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