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.
UPJ obstruction generally occurs when a baby is still growing in the womb. This is called a congenital condition (present from birth). Most of the time, the blockage is caused when the connection between the ureter and the renal pelvis narrows. This causes urine to build up, damaging the kidney. The condition can also be caused when a blood vessel is located in the wrong position over the ureter. In older children and adults, UPJ obstruction can be due to scar tissue, infection, previous treatments for a blockage, or kidney stones.
UPJ obstruction is the most frequently diagnosed cause of urinary obstruction in children. It is now commonly diagnosed during prenatal ultrasound studies. In some cases, the condition isn’t seen until after birth. Children may have an abdominal mass or a urinary tract infection. The most severe cases of UPJ obstruction may require surgery early in life. However, the majority of cases may not require surgery until later in life, and some cases do not require surgery at all.
There may not be any symptoms. When symptoms occur, they may include:
An ultrasound during pregnancy may show kidney problems in the unborn baby. Tests after birth may include:
Surgery to correct the blockage allows urine to flow normally. Open (invasive) surgery is usually performed in infants. Adults may be treated with less-invasive procedures. These procedures involve much smaller surgical cuts than open surgery, and may include:
Permanent loss of kidney function (kidney failure) is a possible complication of untreated UPJ obstruction. Even after treatment, the affected kidney may be at increased risk for infection or kidney stones.
Dr Mahendra Jain is an eminent and an extremely experienced Urologist ...Read More
I had undergone treatment for my prostate in Germany 5 years back. Now I developed urethral stricture, I had lot of problem passing urine.
Mr Alexis is aged 72 yrs from East Africa was treated for his long standing urinary problem with a complex surgery. Now he is back in his country