Section: Overview
Hydronephrosis is the distension or enlargement of the pelvis of the kidney with urine as a result of obstruction of the ureter, which is the tiny tubular structure that allows the passage of urine from the kidney to the urinary bladder. It can be caused by anything that blocks the ureters, including narrowing, cancer or scarring. Other causes include:
Urolithiasis refers to the formation of stones in the urinary tract due to oversaturation of the urine with certain minerals. Calculi can be found anywhere in the urinary tract, but are most common in...
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