Solitary internal iliac artery aneurysms are very rare. Their localisa
tion deep in the pelvis makes diagnosis difficult. Therefore they are
not detected until they reach a significant size and produce symptoms.
These symptoms are due to compression on the adjacent structures or t
heir rupture. Duplex scan, computerized tomography, and arteriography
are the most useful diagnostic procedures. The correct surgical therap
y consists of the Ligature of the internal iliac artery and endoaneury
smorraphy with obliteration of the tributary branches. We report herei
n two cases of aneurysms of the internal iliac artery that made their
clinical debut with signs of rupture.