What is hydronephrosis?

What is hydronephrosis?

Hydronephrosis is the swelling of a kidney which is caused by the accumulation of urine. This happens when the kidney cannot empty urine out through the bladder as a result of a blockage or obstruction such as a kidney stone, blood clot, tumor, enlarged prostate, or enlarged uterus during pregnancy. Hydronephrosis can occur in either one or both kidneys. If the condition appears suddenly, it can be extremely painful. Early diagnosis is crucial in order to prevent permanent kidney damage.

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