Abstract
The author encountered two cases of iliac arteriosclerotic occlusive disease with the clinical symptoms due to plaque rupture. Lower leg pain was noted at the subacute onset. Stenosis and niche-like opacification of a common iliac artery were indicated by angiography. The stenotic portions were resected and replaced by prosthesis. Leg pain subsequently disappeared. Macroscopic findings showed plaque rupture at the inflow surface of the iliac artery and blood entered the plaque. Acute arterial thrombosis may possibly occur by the same mechanism.
