APOE and aneurysm: The authors found that infrarenal diameter of the BM-MSC group was significantly smaller than the control aneurysm group at 4 weeks, and not significantly different from the sham group of ApoE-/- mice that did not have induced aneurysm, while phrenic and ascending diameters had similar diameters of both aneurysmal groups, significantly increased compared to the sham group39.