Giant aneurysm of the pericallosal artery. Case report.

A case is reported of a thrombosed giant aneurysm of the pericallosal artery. Neurological presentation was attributable to the acute swelling of the aneurysmal mass after rapid and massive intraluminal thrombosis. This case demonstrates that initial symptoms in giant aneurysms may be related to the thrombotic events within the enlarged sac. The computerized tomography characteristics of this case are reported and discussed.