A 62-year-old man with Marfan syndrome underwent a Bentall procedure at age 40 for an ascending aortic aneurysm. He remained stable for over two decades, with surveillance via transthoracic echocardiography without documented abnormalities at the aortic root. A cardiac CT performed ten months prior to the current visit first identified a lesion at the aortic root. He was asymptomatic with normal functional capacity. The patient presented now for a scheduled follow-up of this finding. Repeat tran…