CT demonstration of a ureterosciatic hernia.

Ureterosciatic herniation is probably not as uncommon as a literature review would suggest. It rarely produces symptoms and is usually an incidental finding on urogram. The posterior position of the ureter passing beyond the medial wall of the bony pelvis is easily detected on intravenous urography with ipsilateral oblique films and can be confirmed tomographically. This ectopic course of the ureter can be depicted clearly on pelvic computed tomograms.