<prompt> This patient presented to the emergency depament with abdominal pain. What is the MOST significant diagnosis?Superior mesenteric aery embolusSuperior mesenteric vein thrombosisAoic dissectionLeaking aoic aneurysmLeaking aoic aneurysm  <response>: There is a paially occlusive filling defect or defects within the contrast opacified superior mesenteric aery characteristic for a thromboembolus. 