What is hydronephrosis?

Hydronephrosis refers to extra urinary fluid in the kidney. Not a separate disease, but a physical phenomenon that occurs with many diseases, its symptoms, treatment, and prognosis are those of the disease that has caused it.

Hydronephrosis can be caused by obstruction of the ureters or bladder outlet. It can also result from reflux (retrograde passage of urine from the bladder up the ureters to the renal pelvis.)

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.