Infundibulum of the common origin of fourth lumbar arteries and median sacral artery.

We describe an infundibulum of a common origin of the fourth lumbar arteries and the median sacral artery. To the best of our knowledge there has been no such published case thus far and its natural course is unknown, in view of its novelty. Infundibular dilatations in intracranial arteries have been described to progress in size and potentially rupture. Therefore, we recommended follow-up imaging, as part of the management, to ensure stability of the infundibulum.