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Hydronephrosis
Pronunciation
Definition 1
Abnormal enlargement of a kidney, which may be caused by blockage of the ureter (such as by a kidney stone) or chronic kidney disease that prevents urine from draining into the bladder. (NCI Dictionary)
Definition 2
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. (NCI Thesaurus)
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