Anterior cerebral artery aneurysm

Fusiform anterior cerebral artery aneurysm

Anterior cerebral artery (ACA) aneurysms are divided into five groups which include:

1.- Proximal anterior cerebral artery aneurysm or A1 aneurysms.

2.- Anterior communicating artery aneurysms

3.- Proximal pericallosal artery aneurysm or A2 aneurysms

4.- Classical pericallosal artery aneurysm or A3 aneurysms curving around the genu

5.- A4 aneurysm

6.- A5 aneurysms which include distal branch aneurysms.

Weisberg reviewed the CT findings in 40 patients with ruptured aneurysms of the anterior cerebral or anterior communicating artery. Within 3 days of the ictus, the common patterns included blood in the pericallosal cistern and interhemispheric fissure, blood in the caval-septal region, unilateral or bilateral frontal hematoma, and diffuse symmetric intraventricular and basal cisternal blood ¹⁾.

Preoperative evaluation of cerebral vasculature with a cerebral angiogram or high-resolution digital subtraction angiography is essential as multiple aneurysms are commonly associated with anterior cerebral artery aneurysms