**3.3 Inflammatory etiology**

Giant cell arteritis and Takayasu arteritis are rarer causes of aneurysmal dilatation/aortic dissection [22, 23]. While temporal artery involvement is the hallmark of giant cell arteritis, at least 0.15% also had aortic dissection in an autopsy series [22]. Takayasu arteritis on the other hand is an inflammatory disorder that leads to large vessel inflammation characterized by fibrosis and narrowing, which may lead to aneurysmal formation and possible rupture [23]. Corticosteroids are used for acute therapy and surgery is performed once active inflammation subsides [24, 25].
