Compression of the pelvic ureter by a hypogastric aneurysm

: An isolated aneurysm of the right hypogastric artery provoked ureteral compression responsible for renal colic and evidence of uretero-pyelo-caliceal dilatation on I.V.U. Diagnostic features are reviewed and emphasis laid on the severe course of this affection which justifies urgent surgery associating vascular reconstruction, ureterolysis and ureteral reimplantation.