TNFRSF1A and thoracic aortic aneurysm: One additional mouse from the p55+/+LDLR−/− group died due to ruptured thoracic aortic aneurysm (TAA) but presented no AAA and thus was not included in the lethality caused by ruptured abdominal aneurysms (Fig. 6A; p = 0.054).