NCIt definition : The surgical creation of an opening between one or both kidneys and the skin, through
which a tube is place, thereby allowing for the direct drainage of urine from the
kidney.;
Alternative definition : NCI-GLOSS: Surgery to make an opening from the outside of the body to the renal pelvis
(part of the kidney that collects urine). This may be done to drain urine from a blocked
kidney or blocked ureter into a bag outside the body. It may also be done to look
at the kidney using an endoscope (thin, lighted tube attached to a camera), to place
anticancer drugs directly into the kidney, or to remove kidney stones.;