Atherosclerotic aortic-bisiliac aneurysms in two monocorial twins.

Two cases of aorto-bisiliac aneurysms in monocorial twins in their sixties were observed. We report experimental and clinical data from the literature about genetic involvement in the formation of aneurysms, especially when associated with other risk factors. In addition to the genetic factors in the twins we studied, we also found other risk factors, such as hypertension and smoking, which took a long time to affect the patients before the aneurysms were detected.