PMC4286818_01
10-year-old boy with acute abdominal pain. (a) Sagittal grayscale sonographic image of the aorta shows an echogenic intraluminal filling defect (arrow) at the origin of the superior mesenteric artery (SMA). (b) Color Doppler image shows the normal flow pattern in the SMA with no definite mass lesion or intraluminal dissection flap. (c) Sagittal CT angiography reformatted image shows normal abdominal aorta and SMA (arrow) with no evidence of filling defect or dissection. (d) Sagittal sonographic image of the abdominal aorta without the SMA in the scan plane confirms no intraluminal or mural aortic abnormality.
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F1
US showed a hyperechoic well-defined ovoid nonocclusive intraluminal mass in the abdominal aorta between the origin of the superior mesenteric artery (SMA) and the ostia of the renal arteries, closely related to the origin of the SMA [Figure 1a]. Color Doppler examination revealed a normal color flow pattern with no definite mass lesion or intimal dissection flap [Figure 1b]. A computed tomography angiography (CTA) effectively ruled out an aortic intraluminal filling defect [Figure 1c].