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Doctor insights on: Fetal Renal Pyelectasis

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Dr. Carol Major
Board Certified, Obstetrics and Gynecology
30 years in practice
67K people helped
1

1
What is it like to have any experience with fetal pyelectasis?

What is it like to have any experience with fetal pyelectasis?

Fluid in kidneys: The fetal pyelectasis is the dilation of the fetal renal pelvis. This dilation could be secondary to an obstructive process the the fetal urinary tract or a back flow of urine in the fetal urinary tract. Obstruction can occur at the level of the kidney, the ureter or the outlet of the bladder (urethra). The diagnosis is made by ultrasound during pregnancy. ...Read more

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Dr. Daniel Lebowitz
Board Certified
18 years in practice
822K people helped
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Dr. Nikolaos Zacharias
Board Certified, Maternal-Fetal Medicine
20 years in practice
16M people helped
2

2
Can fetal pyelectasis be fatal?

Can fetal pyelectasis be fatal?

No.: Fetal pyelectasis refers to borderline prominence of the renal collecting system and is defined as >4 mm by 20 weeks; >7 mm between 20-30 weeks and >8 mm after 30 weeks. It is seen in 3% of all pregnancies associated with polyhydramnios and diabetes mellitus. It is a very weak marker of increased risk for fetal down syndrome but never causes mortal risk. Neonatal follow-up is required! ...Read more

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Dr. Daniel Lebowitz
Board Certified
18 years in practice
822K people helped
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Dr. Johanna Fricke
Board Certified, Developmental and Behavioral Pediatrics
44 years in practice
16M people helped
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3
25wk fetal boy; us shows eif, and both dilated kidneys 5.2mm/5.8mm pyelectasis, normal quad screen testing, should I be worried? Is this serious?

25wk fetal boy; us shows eif, and both dilated kidneys 5.2mm/5.8mm pyelectasis, normal quad screen testing, should I be worried? Is this serious?

On the fence. If : There were > 2 markers, especially if they included nuchal thickening ; hyperechoic bowel , your OB would have offered a genetic amniocentesis to rule out aneuploidy, an abnormal # of fetal chromosomes. Ask to see a fetal-maternal medicine specialist who can review fetal growth ; markers, do a super-high-tech fus ; maybe a fetal echocardiogram. Then make an informed decision about amnio. ...Read more

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Dr. George Klauber
Board Certified, Pediatric Urology
30M people helped
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4
What to do if I'm 36 wks preg, baby is diagnosed fetal hydronephrosis,renal pelvis measures 7.5cm,will she lose her kidney?

What to do if I'm 36 wks preg, baby is diagnosed fetal hydronephrosis,renal pelvis measures 7.5cm,will she lose her kidney?

Do nothing now: Baby is almost certainly perfectly OK. If renal pelvis 7.5mm, nothing to worry about & will 99 - 100% settle down as a normal kidney. 7.5 cm is very large & will almost certainly require intervention. Will require:- pediatric urologist, post natal US , VCUG & nuclear scan after birth to evaluate swollen kidney for function. Removal only if no or essentially no function. Life with 1 kidney is OK. ...Read more

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Dr. Daniel Lebowitz
Board Certified
18 years in practice
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Dr. Marilynn Frederiksen
Board Certified, Maternal-Fetal Medicine
41 years in practice
1M people helped
5

5
Fetal ultrasound showed enlarged renal pelvis and large head. So could it be a syndrome?

Fetal ultrasound showed enlarged renal pelvis and large head. So could it be a syndrome?

May or may not.: Enlarged renal pelvises are common urinary tract anomalies. A large head can be familial. So not likely. But then there is much ultrasound can't diagnose. Just have to wait and see. ...Read more

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Dr. Stacy Yamasaki
Board Certified, Radiology
28 years in practice
116K people helped
6

6
What to do if I'm 35 weeks pregnant and my ultrasound says mild polyhydramnios with bilateral fetal dilated renal calyces?

What to do if I'm 35 weeks pregnant and my ultrasound says mild polyhydramnios with bilateral fetal dilated renal calyces?

Talk to your doctor: Depending on other clinical factors, mild polyhydramnios and mild dilated calyces may be within normal limits, but could be markers for a high risk delivery and underlying fetal problems. This cannot be answered in a forum. Your doctor needs to evaluate all the parameters. ...Read more

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Dr. Alan Patterson
Board Certified, Obstetrics and Gynecology
36 years in practice
72M people helped
7

7
My fetus has pyelectasis. Could she also have ds?

My fetus has pyelectasis. Could she also have ds?

Ask your OB: I assume they have done the proper testing , most babies that have pyelectasis which is not totally uncommon do not have ds but if u are worried please discuss with your obgyn. ...Read more

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Dr. Jan Lei Iwata
Board Certified, Ophthalmology
20 years in practice
10M people helped
8

8
For my fetus, all my usg were normal till 30 weeks. Now at 32 weeks it shows that fetus has pyelectasis at 8.2 mm.Can pyelectasis develop so suddenly?

For my fetus, all my usg were normal till 30 weeks. Now at 32 weeks it shows that fetus has pyelectasis at 8.2 mm.Can pyelectasis develop so suddenly?

Fetal growth is fast: The fetus is constantly growing rapidly and logarithmically to become the little baby you get to see at the end of 9 months from being a single celled embryo. By 3 weeks many of the eyes, ears, and such are already developed. So, the rest is occurring at rapid pace. It's amazing how automatically the human fetus is programmed to develop perfectly as time moves on. There are even neonatal surgeons! ...Read more

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Dr. Lydia Collins
Board Certified, Gynecology
30 years in practice
34M people helped
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Dr. Moneer Hanna
Board Certified, Pediatric Urology
52 years in practice
19K people helped
10

10
I am 37 weeks pregnant. My afi is 219 and my baby has bilateral pyelectasis (one 33/52 and the other 37/32). Should i be concerned?

I am 37 weeks pregnant. My afi is 219 and my baby has bilateral pyelectasis (one 33/52 and the other 37/32). 
Should i be concerned?

Prenatal pyelectasis: Prenatal pyelectasis is common , the current reccomendation is to get postnatal ultrasound exam. Of the kidneys and bladder at 36-48 hours prior to discharge and repeat the exam at 4-6 weeks, if the dilation persist you should consult a pediatric urologist in your area , if the early (36 hrs) ultrasound study show bilateral hydronephrosis in a baby boy a voiding cystourethrogram is reccomended. ...Read more

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Dr. Daniel Lebowitz
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