Are brain aneurysms hereditary?

A fellow caregiver asked...

If you have an immediate family member who had an brain aneurysm, what is the likelihood of having one myself?

Expert Answer

Jennifer Serafin, N.P. is a registered nurse and geriatric nurse practitioner at the Jewish Homes for the Aged in San Francisco.

The likelihood of you having a brain aneurysm if one of your family members has one is rare, unless the aneurysm is caused by a hereditary disorder like polycystic kidney disease.  Current recommendations state that if two or more family members (first degree relatives) have a aneurysm, then other family members should get screened with an MRI.