Quotation from: Manual of Surgery

Written by: Alexander Miles and Alexis Thomson

The condition usually proves fatal, either by the aneurysm bursting into
the peritoneal cavity, or by slow leakage into the retro-peritoneal
tissue.

The Moore-Corradi method has been successfully employed, access to the
sac having been obtained by opening the abdomen. Ligation of the aorta
has so far been unsuccessful, but in one case operated upon by Keen the
patient survived forty-eight days.