A<unk>  is performed whenever a blockage keeps urine from passing from the kidneys, through the ureter and into the urinary bladder. Without another way for urine to drain, pressure would rise within the urinary system and the kidneys would be damaged. The most common cause of blockage necessitating a<unk>  is cancer, especially ovarian cancer and colon cancer.<unk> es may also be required to treat pyonephrosis, hydronephrosis and kidney stones.
Nephrostomy
Percutaneous nephrostomy
Urostomy
Ureterostomy
Ureteroureterostomy
Ureteric balloon catheter
Ureteric stent
Ureterocutaneostomy