 The prevalence of aortic root dilatation ranges from 8.8 to 42% in patients with Turner syndrome.Even if not every aortic root dilatation necessarily goes on to an aortic dissection (circumferential or transverse tear of the intima), complications such as dissection, aortic rupture resulting in death may occur.The natural history of aortic root dilatation is still unknown, but it is linked to aortic dissection and rupture, which has a high mortality rate.