| 单词 | unilateral hydronephrosis | 
| 释义 | unilateral hydronephrosisunilateral hydronephrosisNephrology Distention of the pelvis and calyces of a single kidney because urine can't drain into the bladder Etiology Unilateral ureteral obstruction, vesicoureteric reflux, kidney stones. See Hydronephrosis. | 
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