抄録
A case of a recurrent and growing giant aneurysm following repeated endovascular treatment is discribed. The patient finally underwent direct clipping of the aneurysm. A surgical specimen of the aneurysm showed marked neovasculization in both the aneurysmal wall and mural thrombus. These findings suggest that this aneurysm grew by repeated bleeding between the aneurysmal wall and the outer layers of the thrombosed sac. Possible explanation of the enlarging aneurysms and risk of endovascular surgery as a treatment for this aneurysm are discussed.
