A pyelogram is an x-ray of the urinary system that involves injecting a contrast dye into a vein to help doctors evaluate a person's kidneys, ureters, and bladder when they experience symptoms such as blood in the urine or pain in the side or lower back.

Leaking urine can cause urinary tract infections, kidney failure, or kidney-related diseases. Diagnosing the cause of leaking urine in children is an important part of treating the disease.