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Doctor insights on: Fetal Hydronephrosis

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What is severe fetal hydronephrosis?

What is severe fetal hydronephrosis?

Trapped urine.: Severe fetal hydronephrosis is diagnosed when urine is trapped inside the renal collecting system of a fetus with resultant destruction of kidney tissue. It can be due to stenosis or obstruction at various points in the urinary tract and merits postnatal antibiotic uroprophylaxis and imaging. Bilateral severe cases may cause oligohydramnios and fetal lung hypoplasia or demise. Seek mfm care asap! ...Read more

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Dr. Michael Kleerekoper
137 doctors shared insights

Hydronephrosis (Definition)

Due to abnormal amount of urine retained by kidney due to swelling of internal renal collecting system consisting of cayces & renal pelvis. Urinary collecting ducts drain into calyces which dreain into pelvis (like a funnel) draining into ureter. Causes mostly blockage, congenital or acquired from stone, fibrous tissue, growth or external pressure of pelvis or lower down, ...Read more


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How is fetal hydronephrosis diagnosed?

How is fetal hydronephrosis diagnosed?

Maternal ultrasound: Can sometimes already be detected after 10-12 weeks gestation. More commonly in mid to late pregnancy. Sometimes suspected and found in presence of oligohydramnios (reduced amniotic fluid). ...Read more

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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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I'm 36 weeks pregnant with fetal bilateral hydronephrosis, do ihave to undergo a c-section asap?

I'm 36 weeks pregnant with fetal bilateral hydronephrosis, do ihave to undergo a c-section asap?

See Pedi Urologist: Bilat hydronephrosis can indicate several different problems. You should involve a pediatric urologist promptly. In the male fetus, this can indicate posterior urethral valves which needs to be addressed immediately upon delivery. It could also indicate bilateral vesico-ureteral reflux or obstruction where the kidneys drain into the ureters (upj-obstruction) either way, see peds uro stat. ...Read more

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What is fetal hydrophrenosis?

What is fetal hydrophrenosis?

Swollen fetal kidney: Baby's kidney is swollen with urine. Very common & not serious if mild & only present on one side. Most commonly due to partial blockage to kidney pelvis (funnel draining urine). Can also be due to blockage at lower end of ureters, urethral valve blockage in boys or bladder reflux. Virtually never need to intervene before birth or deliver early. Best managed &/or counseled by pediatric urologist. ...Read more

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What is unilateral hydronephrosis?

What is unilateral hydronephrosis?

Hydronephrosis: Refers to fluid inside the kidney. This fluid is urine which is able to remain in the kidney because of a larger size of the renal pelvis. The renal pelvis is the part of the kidney where the urine collects prior to descending into the bladder. The size of the pelvis should not exceed 7 mm on ultrasound. Small increases have no clinical significance and may represent variants of normal. ...Read more

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What are the symptoms of hydronephrosis?

What are the symptoms of hydronephrosis?

Hydronephrosis: Swelling of the kidney due to backing up of urine caused by obstruction to its outflow can cause infection with shaking chills and fever and can cause back/flank pain. Sometimes it's silent,however. ...Read more

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How serious is developing hydronephrosis?

How serious is developing hydronephrosis?

It depends...: Hydronephrosis, typically diagnosed by a ct scan or an ultrasound, is distension of the portion of the kidney that collects the urine. There are many causes, but the most common in adults is obstruction to the flow of urine. Left untreated, this can lead to permanent kidney damage. You should see your urologist for further information. ...Read more

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Good treatments for hydronephrosis?

Good treatments for hydronephrosis?

Depends on cause: Due to obstruction or bladder reflux. Just follow if due to small kidney stone which will pass on its own or minimal anatomic obstruction. Stones too large to pass need temporary stent placement, or transurethral or percutaneous lithotripsy or eswl. Significant obstruction or bledder reflux best corrected surgically by experienced urologist by open surgery, robotic or laparoscopic surgery. ...Read more

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What are treatments for hydronephrosis?

What are treatments for hydronephrosis?

It depends on cause: Hydronephrosis is a descriptive term for "a lot of fluid in the kidney". It can have multiple causes: from congenital obstruction to stones to reflux of urine from the bladder. Sometimes hydronephrosis is the end result of one of the above conditions and does not require any treatment. By analogy it is like a headache which can be caused by several conditions: treat the cause of the headache. ...Read more

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