Ascending tubular aorta aneurysm (HP_0004970) is an abnormal localized widening (dilatation) of the tubular part of the ascending aorta. Also known as: Aneurysm of the ascending tubular aorta, Ascending aortic aneurysm, Ascending aortic dilation, Bulging of wall of large artery located above heart, Dilatation of ascending aorta.