Asked by: Kati Siebenborn
asked in category: General Last Updated: 11th April, 2020

What is the difference between Pyelectasis and hydronephrosis?

When the pelvis is stretched or enlarged, but not enlarged enough for doctors to diagnose hydronephrosis, it is considered pyelectasis. Pyelectasis also is known as renal pelvic dilatation. (Dilatation means stretching or enlargement). Enlargement of 4 to 10 mm also may be called mild hydronephrosis.

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Keeping this in view, is Pyelectasis dangerous?

It is a relatively common ultrasound finding in fetuses and is three times more common in male fetuses. In most cases pyelectasis resolves normally, having no ill effects on the baby. The significance of pyelectasis in fetuses is not clear. Pyelectasis is considered to be a "soft marker” for Down syndrome.

Additionally, what is Pelviectasis on ultrasound? A. Fetal pelviectasis (also called pyelectasis or renal pelvis dilation) is a common finding on midtrimester ultrasound, occurring in 0.5% to 4.5% of fetuses. Pelviectasis is defined as a renal pelvic diameter 4 mm to 9.9 mm, and hydronephrosis as 10 mm or larger.

In this regard, does hydronephrosis mean Down syndrome?

In most cases, there are no other abnormalities. However, hydronephrosis can be seen more commonly in babies with Down syndrome. The risk of Down syndrome is thought to be low when there are no additional risk factors, such as abnormal ultrasound or maternal serum screening results).

What causes Pyelectasis?

The most common causes of pyelectasis are: Ureteropelvic junction obstruction: A blockage of urine between the kidneys and the ureter. Vesicoureteral reflux: An abnormal flow of urine from the bladder to the kidneys.

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Is Pyelectasis a marker for Down syndrome?

Pyelectasis is considered an ultrasound "marker," which increases the chance that the baby may have Down syndrome. Although Down syndrome can occur in any pregnancy, the chance for Down syndrome increases with the mother's age.

How common is fetal Pyelectasis?

Fetal pyelectasis is found in approximately one percent of all pregnancies, which makes it a relatively common finding. It is more often seen in male fetuses than female.

Is hydronephrosis a birth defect?

Birth defects can occur in any part of the urinary tract. A blockage of the outflow of urine or reverse flow of urine already in the bladder (called reflux) can cause the renal pelvis to become enlarged. This is usually called hydronephrosis.

Is enlarged kidneys a sign of Down syndrome?

Less often, a dilated renal pelvis is an early sign of a more serious problem with the bladder, kidney, or ureter. Down syndrome: Some studies raised concerns about a small risk for Down syndrome with this ultrasound finding. A dilated renal pelvis is usually seen during a routine ultrasound.

What does hydronephrosis look like on ultrasound?

Hydronephrosis [water - kidney condition] refers to a kidney with a dilated pelvis and collecting system. It can be caused by obstruction of the ureters or bladder outlet. This longitudinal ultrasound of a left kidney shows a large hypoechoic area (black on an ultrasound means no echoes) in the center of the kidney.

How common is hydronephrosis?

Hydronephrosis is a common congenital condition that is found in about one out of every 500 babies. Hydronephrosis can affect one kidney (unilateral) or both kidneys (bilateral). It is often referred to as being 'prenatal' or 'antenatal.

What does Pelvicaliectasis mean?

Pyelectasis and pelviectasis are defined as dilatation of the renal pelvis, whereas pelvicaliectasis and hydronephrosis include dilatation of calyces. In practice, these terms are interchanged and used as descriptions of a dilated renal collecting system regardless of etiology.

What causes kidney problems in newborn babies?

Defects in the urinary tract and other parts of the body. Birth defects that affect the spinal cord, such as spina bifida link, can affect the nerves that control the urinary tract and cause urinary retention. Urine retained in the bladder may flow backward into the ureters and kidneys, causing hydronephrosis.

What is the normal size of renal pelvis?

The size of the renal pelvis plays a major role in the grading of hydronephrosis. Normally, the anteroposterior diameter of the renal pelvis is less than 4 mm in fetuses up to 32 weeks of gestational age and 7 mm afterwards. In adults, 13% of the normal population have a transverse pelvic diameter of over 10 mm.

What causes hydronephrosis?

Often, something inside or outside of the urinary tract that blocks the urine flow out of the kidneys causes hydronephrosis. Blockages in the urinary tract that can lead to hydronephrosis include kidney stones or an enlarged prostate.

What causes hydronephrosis pregnancy?

Fetal hydronephrosis is caused by an obstruction to what should be a free flow of urine out of the kidney. It may also be caused by an abnormal backwashing of urine from the bladder back into the kidney. An example of this is vesicoureteral reflux or "reflux."

What markers did your Down syndrome baby have?

Certain features detected during a second trimester ultrasound exam are potential markers for Down's syndrome, and they include dilated brain ventricles, absent or small nose bone, increased thickness of the back of the neck, an abnormal artery to the upper extremities, bright spots in the heart, 'bright' bowels, mild

How common is hydronephrosis in babies?

Hydronephrosis is a condition, affecting about 1 in 100 babies, where urine overfills or backs up into the kidney, causing the kidney to swell. Infants with hydronephrosis may be diagnosed before (prenatal) or after (postnatal) birth. More than half of the cases resolve by the time the baby is born or soon after.

What does it mean when a fetus has enlarged kidneys?

Hydronephrosis. Hydronephrosis is one of the most commonly diagnosed fetal anomalies and occurs when one or both of a baby's kidneys become enlarged due to urine blockage. If your baby has restricted urine flow or urine reflux, a reversal of urine flow, their kidneys will begin to swell, resulting in this condition.
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