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Ureteropelvic Junction (UPJ) Obstruction

Ureteropelvic junction obstruction is a blockage at the junction of the ureter and the kidney. This results in decreased flow of urine to the ureter and an increase of fluid pressure inside the kidney, which can cause a decrease in kidney function. UPJ obstruction can be either congenital (the patient is born with it) or it can develop over time due to trauma or change in body shape with age. The blockage can be caused by scar tissue, kinking, a blood vessel and in rare cases a tumor. Infection can occur in association with the obstruction, with patients becoming quite ill and having high fevers. This condition may require hospitalization, emergency drainage of the urine and treatment with intravenous antibiotics. In some instances, the condition is incidentally detected by scans or x-rays for unrelated problems.

While conventional open surgery has been the treatment for UPJ obstruction, newer, less invasive treatment options have been developed.