hydronephrosis

noun
hy·​dro·​ne·​phro·​sis | \ -ni-ˈfrō-səs How to pronounce hydronephrosis (audio) \
plural hydronephroses\ -​ˌsēz How to pronounce hydronephroses (audio) \

Medical Definition of hydronephrosis

: cystic distension of the kidney caused by the accumulation of urine in the renal pelvis as a result of obstruction to outflow and accompanied by atrophy of the kidney structure and cyst formation

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