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Fetal ultra-sound at 24 weeks, shows bilateral renal pelvis. Any need to worry?

I just had a fetal us at 24 weeks and the report shows bilateral dilated renal pelves. One is 3mm and the other is 4 mm. Also the femur length to head circumference ratio was just slightly elevated. Do I need to worry about these findings? In the impression of the report the radiologist mentions that all of the rest of the scan was fine. Thanks.
Asked On : Fri, 15 Feb 2013
Answers:  1 Views:  105
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In the second trimester, if the renal pelvis dimension is more than 7 mm it is moderate hydronephrosis and if it is more than 10 mm then it is severe. However, it needs to be assessed again in the last trimester where dimension of more than 15 is severe hydronephrosis. Therefore in your case you need not worry about the renal problems at all. For all purposes the readings are fine. Even with the FL and head circumference you need not worry. They can be re-assessed at a later stage. The discordance in your case which as you put it is "mild" is most commonly due to some difference in the date calculations of fetal gestation. So you can be at peace.
Answered: Fri, 15 Feb 2013
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