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Doctor insights on: Pathophysiology Of Hydronephrosis

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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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Dr. Jeffrey Satinover
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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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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Can hydronephrosis cause pylonephritis?

Can hydronephrosis cause pylonephritis?

Not cause/predispose: Hydronephosis does not cause pyelonephritis but it predisposes to it. ...Read more

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Is hydronephrosis/pelviectasis a sign of down's syndrome?

Is hydronephrosis/pelviectasis a sign of down's syndrome?

Not at all: There is a very slightly increased risk of down syndrome when prenatal hydronephrosis is diagnosed at maternal-fetal ultrasound during pregnancy. ...Read more

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My unborn baby boy has unilateral hydronephrosis. What is this?

My unborn baby boy has unilateral hydronephrosis. What is this?

Not to worry: Your baby will have an ultrasound after birth to see if it is still there.This is a finding I read a lot on prenatal ultrasound reports. So far none in my experience have had it after birth even though they were all thought to have it prenatally. It means the kidney on the affected side has developed an appearance suggestive of back up fluid and pressure on it as if something is blocking the flow of urine from the kidney to the bladder. ...Read more

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What is the difference between hydroureteronephrosis and hydronephrosis?

What is the difference between hydroureteronephrosis and hydronephrosis?

Somewhat technical: Hn applies to the kidney per se where hun implies distinction of the kidney and ureter ( the tube carrying urine from kidney to bladder). Often they mean the same thing, unless the point of obstruction is before the ureter begins, eg, the ureteropelvic junction. ...Read more

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Can you please describe left mega urethra and unilateral hydronephrosis?

Can you please describe left mega urethra and unilateral hydronephrosis?

Here are some...: Oftentimes, the described condition is a congenital anomaly resulting from poorly innervated distal atonic ureter, which is usually found incidentally on imaging studies for other reasons. Such adynomic segment and resulting massive ureteral dilation is prone to bleed upon trauma and to induce bacterial UTI so to precipitate active evaluation. More? Ask urologist or radiologist timely. ...Read more

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What is left mega urethra and unilateral hydronephrosis? What causes it?

What is left mega urethra and unilateral hydronephrosis? What causes it?

Here are some...: Oftentimes, the described condition is a congenital anomaly resulting from poorly innervated distal atonic ureter, which is usually found incidentally on imaging studies for other reasons. Such adynomic segment and resulting massive ureteral dilation is prone to bleed upon trauma and to induce bacterial UTI so to precipitate active evaluation. More? Ask urologist or radiologist timely. ...Read more