Bilateral congenital absence of internal iliac arteries, prominent lumbar arteries, and a ruptured mycotic aneurysm of the abdominal aorta.

A 46-year-old man was admitted for surgery on a ruptured mycotic abdominal aortic aneurysm. Emergency repair was performed, during which certain anomalies were noted. First, the bifurcation of the aorta was posterior to the left common iliac vein.