partial nephrectomy
Meaning of partial nephrectomy: Kidney tissue does not grow back, and keeping more of it lowers the chance of kidney trouble years after the cancer is gone.
Definition of partial nephrectomy
Partial nephrectomy is an operation that removes a tumor or a damaged portion of a kidney while leaving the rest of the organ in place and working. The surgeon cuts around the abnormal area with a margin of healthy tissue, then closes the raw surface and seals any urine-collecting channels opened in the process. It may be done through an open incision, through keyhole ports, or with robotic assistance.
Why keep part of a kidney at all?
Because kidney tissue never grows back, and most people need more of it than they expect. Someone with two healthy kidneys can manage after losing one, but the loss raises the chance of reduced kidney function later. That matters most for people who already have high blood pressure, diabetes or narrowed arteries, and those conditions are common among people found to have a kidney tumor. For a small growth, taking only the tumor gives cancer control comparable to removing the whole kidney while leaving far more filtering tissue behind. That trade is what moved the operation from a last resort to the usual choice.
How does it compare with the alternatives?
| Operation | What is removed | Usual reason |
|---|---|---|
| Partial nephrectomy | The tumor with a rim of normal tissue | A small or favorably placed growth |
| Radical nephrectomy | The whole kidney, often with surrounding fat | A large or centrally placed tumor |
| Simple nephrectomy | The whole kidney alone | A kidney destroyed by infection or blockage |
Position often decides more than size. A growth sitting on the outer surface lifts away readily, while one wrapped around the vessels and collecting channels at the center can make radical nephrectomy the safer course. The parent term for removing kidney tissue is nephrectomy, qualified by how much of the organ is taken.
What is particular about this operation?
The kidney bleeds heavily, so its blood supply is usually clamped while the tumor is cut out and the surface repaired. The organ tolerates that interruption only for a limited period, and keeping it short is an explicit goal; where the anatomy allows, techniques that avoid clamping altogether are used instead. Two complications follow directly from the anatomy. Urine can leak from collecting channels that were opened and not completely sealed. And bleeding can appear days or weeks later from a weakened point in a cut vessel, sometimes announcing itself as blood in the urine after an apparently smooth recovery. The operation is also chosen irrespective of tumor size when only one kidney works, when tumors are present in both, or when an inherited condition means more tumors are expected over time.
Also known as
Used in a sentence
A partial nephrectomy was performed for a small tumor at the lower pole.
Good to know
Preserving working kidney tissue reduces the risk of later kidney impairment, which is why removing only the tumor is generally favored for small growths, with cancer control comparable to removing the whole organ.
Word origin
Where “partial nephrectomy” comes from
Nephrectomy joins the Greek nephros, meaning kidney, to ektome, meaning a cutting out. The word partial marks that only a portion of the organ is taken.