A pyeloplasty is the removal of a stricture (narrowing) from within the upper ureter where it connects to the kidney. Pyeloplasty is usually reserved for strictures that are causing blockage and ongoing symptoms such as pain and recurrent infection or kidney damage.

Other treatments for ureteric strictures can be used with mild strictures and would have a slightly less chance of curing the problem, such as:

• Percutaneous endopyelotomy uses a telescopic instrument through the flank, into the kidney and repairing the stricture from within.
   
• Trans-ureteric surgery involves passing a thin telescopic instrument up the urethra, through the bladder and into the effected ureter without using any external incisions.