Hydronephrosis: Symptoms & Signs

Medically Reviewed on 1/29/2021

Hydronephrosis is a condition in which the urine collecting system of the kidney is dilated. This may be a normal variant or it may be due to an underlying illness or medical condition.

Signs and symptoms of hydronephrosis depend on the underlying cause and whether the condition arises suddenly or develops slowly over time. When the condition is due to stones, symptoms may include

Other causes of hydronephrosis may lead over time to symptoms of kidney failure such as

Causes of hydronephrosis

The most common cause of hydronephrosis is blockage of the urinary system due to stones, tumors, or other conditions. Hydronephrosis is also associated with pregnancy, and a number of conditions can cause hydronephrosis.

Other hydronephrosis symptoms and signs


Kidney Stones: Symptoms, Causes, and Treatment See Slideshow

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Jameson, J. Larry, et al. Harrison's Principles of Internal Medicine, 20th Ed. New York: McGraw-Hill Education, 2018.