Ureteropelvic junction (UPJ) obstruction is a blockage in the renal pelvis of your kidney, causing pee to slow or stop completely. Treatment may include surgery.

Ureteropelvic junction (UPJ) obstruction is a blockage in the area that connects the renal pelvis (part of the kidney) to one of the tubes (ureters) that move urine to the bladder. It generally …

What is the UPJ? The ureteropelvic junction (UPJ) is the area where the upper end of the ureter meets the renal pelvis (the part of the kidney that funnels urine into the ureter). This is the second most common area for stones to get stuck and cause symptoms because it is one of the narrowest parts of the urinary tract.

Ureteropelvic junction (UPJ) obstruction refers to the blockage of normal urine from the kidney to the bladder. UPJ obstruction occurs at the point where the kidney joins the ureter. Ureters are small tubes (less than 5 mm in diameter) that connect the kidney to the bladder.

Ureteropelvic junction (UPJ) obstruction is a condition where the ureter, the tube that connects the kidney to the bladder, is blocked at the top portion where it leaves the kidney.

UPJ obstruction occurs when urine flow is blocked at the junction where the renal pelvis (the part of the kidney that collects urine) meets the ureter. This blockage can cause urine to accumulate in the kidney, leading to hydronephrosis, a condition in which the kidney swells due to excess urine.

Ureteropelvic junction (UPJ) obstruction describes various causes of impaired drainage at the UPJ. Regardless of the cause, the end result is the same: impedance in the normal flow of urine from the renal pelvis into the proximal ureter, resulting in caliectasis and hydronephrosis.

The term ureteropelvic junction (UPJ) obstruction describes a blockage to this area. The obstruction impedes the flow of urine down to the bladder, causing the urine to back up in the kidney and dilate it (hydronephrosis).

Ureteropelvic junction (UPJ) obstruction occurs when the area connecting the renal pelvis (part of the kidney) to one of two tubes that connect with the bladder (ureter) becomes blocked, causing urine to build up, which damages the kidneys. A UPJ obstruction can also occur if a blood vessel is positioned incorrectly over the ureter.

2025年3月3日 · Ureteropelvic junction (UPJ) obstruction or pelviureteric junction (PUJ) obstruction partially obstructs the passage of urine from the renal pelvis to the ureter. It is the most frequent cause of hydronephrosis in the fetus and can also present i...