Aneurysmal Distribution

Most aneurysms arise from the anterior circulation (85-95%), whilst 5-15% arise from the posterior circulation.

ACOM artery aneurysms are the commonest lesion, particularly in men (46 vs 27% in women). Also common are aneurysms arising from the ICA, especially in women (36.8% compared with 18% in men). PCOM artery aneurysms are found in 20-25% of individuals, whilst MCA aneurysms are found in 15-20%.

Within the posterior circulation, 10% arise from the basilar artery, the basilar tip being the most common site, followed by the superior cerebellar junction. Five percent arise from the vertebral artery, the posterior-inferior cerebel-lar artery being the most common site.

Cure Your Yeast Infection For Good

Cure Your Yeast Infection For Good

The term vaginitis is one that is applied to any inflammation or infection of the vagina, and there are many different conditions that are categorized together under this ‘broad’ heading, including bacterial vaginosis, trichomoniasis and non-infectious vaginitis.

Get My Free Ebook

Post a comment