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Hydronephrosis

MONDO:0005510

Collection of urine in the renal pelvis that results in dilatation of the renal pelvis and calyces. It is caused by obstruction of urine flow, nephrolithiasis, or vesicoureteral reflux. Signs and symptoms include flank pain, nausea, vomiting, fever, and dysuria.

9 clinical trials for this condition and its sub-types, 7 tagged with Hydronephrosis itself.

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Part of

↑ Kidney disorder (4039) ↑ Urinary tract obstruction (27)

Sub-types of Hydronephrosis

  • Congenital hydronephrosis 3 trials
Including sub-types (9) Tagged with Hydronephrosis (7)
Trials to join now! 4 Not yet recruiting 1 Not yet finished but already full! 1 Completed 1
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  • AI could help babies avoid unnecessary kidney surgery

    Diagnosis Not yet recruiting

    This study tests an AI tool that analyzes ultrasound images to help doctors decide if a baby with hydronephrosis (kidney swelling) needs surgery. About 322 infants up to 24 months old will take part. Doctors first make a care plan without the AI, then see the AI's prediction and …

    Sponsor: The Hospital for Sick Children • Aim: Diagnosis

    Last updated Jun 27, 2026 12:31 UTC

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