Pelvo-Ureteric Junction (PUJ) Obstruction

What is the PUJ?

This stands for Pelvo-Ureteric Junction. This is where the renal pelvis joins the upper end of the ureter, the tube through which urine flows from the kidney to the bladder. The renal pelvis is a funnel shape and has cuplike extensions, called Calyces, within the kidney. Under normal conditions, the kidneys filter the blood and remove waste, salts and water to produce urine. This collects in the renal pelvis before it flows on through the ureter into the bladder.


What is a PUJ obstruction?

An obstruction of the PUJ is when the kidney makes urine faster than it can be drained through the renal pelvis into the ureter. This causes the urine to pool in the kidney, which leads to kidney swelling (hydronephrosis).

What is the cause of a PUJ obstruction?

What are the symptoms of a PUJ obstruction?

How is a PUJ obstruction diagnosed?

How is a PUJ obstruction treated?

Treatment is only recommended if the PUJ obstruction is confirmed and is causing symptoms or complications such as:

For symptomatic or significant PUJ obstruction treatment is in the form of a pyeloplasty, which is usually done robotically at GM Urology. Other options, which are less effective and only appropriate in some circumstances include: