PMC9619142_01
Early (A) and delayed (B) postcontrast CT images, at the level of the pelvis, show abnormal enhancing soft tissue around the aortic graft (white arrows). The native calcified and occluded aorta is seen posterior to the graft. Whole body (MIP:Maximum Intensity Projection) image from the PET/CT shows mild to moderate uptake around the aortic graft (black arrow). This is better characterized on the fused axial (D) and coronal (E) images showing uptake corresponding to the abnormal enhancing soft tissue identified earlier on the diagnostic CT. These findings are consistent with aortic graft infection.
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A follow-up surveillance CT showed enhancing soft tissue (Fig. 1A & B) and developing fluid collection around the aorto-femoral bypass graft. Subsequent FDG PET/CT showed persistent circumferential soft tissue thickening and fluid surrounding the aortic graft with associated FDG avidity, with maximum SUV of 5.3, extending from the aortic anastomosis distally to the level of the right common iliac artery (Fig. 1C-E).