1) varicose veins

2)neuroblastoma

3)

Intravenous urography

If urography fails to demonstrate ureteral obstrution, then there's nothing blocking the ureters. The study didn't give you a diagnosis, but it ruled out a diagnosis.

Most diseases of the kidneys, ureters, and bladder will yield information to this procedure, which actually has two phases. First, it requires a functioning kidney to filter the dye out of the blood into the urine.

Antegrade pyelography differentiates this procedure from "retrograde pyelography," which injects dye into the lower end of the system, therefore flowing backward or "retrograde." Retrograde pyelography is better able to.