Without knowing more about the case personally (i.e. what is causing the hydronephrosis), it is difficult to give specific answers to your question. Here are the major causes of this:
* Acute unilateral obstructive uropathy
* Chronic unilateral obstructive uropathy
* Vesicoureteric reflux (backflow of urine from bladder to kidney)
* Nephrolithiasis (kidney stones)
* Idiopathic hydronephrosis of pregnancy
There are some causes where a stent placement may be considered to relieve the obstruction. If this has already been considered, then removing the kidney may be your last option.
Determination of the best treatment (i.e. stent vs removing the whole kidney) would be made in conjunction with your personal urologist. You may want to consider another opinion at an academic medical center.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.