How does the prevalence of cerebral aneurysms vary by sex?

Updated: Dec 06, 2018
  • Author: David S Liebeskind, MD, FAAN, FAHA, FANA; Chief Editor: Helmi L Lutsep, MD  more...
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Cerebral aneurysms affect equal numbers of women and men younger than 40 years, although women are affected more frequently in older age groups. Overall, the female-to-male ratio has been estimated at 1.6:1.

  • Saccular aneurysms are most common in the anterior communicating artery (ACoA) or anterior cerebral artery (ACA) in men, whereas the junction of the ICA with the posterior communicating artery (PCoA) is the most common site for saccular aneurysms in women.

  • Giant aneurysms are 3 times more common in women than men.

  • The prognosis of aneurysmal SAH is worse for women than men.

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