My older sister passed away from a brain aneurysm. My younger sister was diagnosed with an ascending aortic aneurysm and had to have surgery to repair the damage. Now my younger brother has been diagnosed with an abdominal aneurysm. What are the chances that I will have an aneurysm? There have been no other family members diagnosed that I m aware of.
In your family it is obvious that aneurysms and apparently (aortic types) prevail.  Numbers are difficult to be precise on since so many variables come into play when discussing the genetics of this disease within a family.  However, has everyone in the family been screened for certain diseases that are known to manifest with aortic types of aneurysms such as Elhers-Danlos, Mar fans, and other connective tissue disease problems?  The statistics are variable from If you have further questions I happen to answer them at: bit.ly/ Chat Doctor.