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We describe a case of lumbosacral plexopathy caused by an isolated aneurysm of the common iliac artery. The patient presented with worsening low back pain, progressive numbness and weakness of the right leg in the L2-L4 distribution. This had previously been diagnosed as sciatica. A CT scan showed an aneurysm of the right common iliac artery which measured 8 cm in diameter. Despite being listed for emergency endovascular stenting, the aneurysm ruptured and the patient died. It is important to distinguish a lumbosacral plexopathy from sciatica and to bear in mind its treatable causes which include aneurysms of the common and internal iliac arteries.

Original publication




Journal article


The Journal of bone and joint surgery. British volume

Publication Date





1524 - 1526


St. Andrews Centre for Plastic Surgery and Burns, Broomfield Hospital, England.


Lumbosacral Plexus, Humans, Peripheral Nervous System Diseases, Aneurysm, Ruptured, Iliac Aneurysm, Fatal Outcome, Aged, Male