PMC6319523_01
Sixty seven year old male with mycotic aneurysm of the thoracic aorta. a Axial and b coronal images show enhancing, multiseptated, and lobulated low density mass within the lower retrocrural space/posterior mediastinum that abuts the adjacent thoracic aorta along 180 degrees of contact. Focal outpouching of the descending thoracic aorta at this site is consistent with a psuedoaneurysm. c Post stent graft deployment angiogram and d CT show satisfactory placement of the stent graft with no residual psuedoaneurysm or post procedural endoleaks
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Fig1
Initial cross sectional imaging at the time of presentation demonstrated a new, multi-septated peripherally enhancing 6.3 cm x 1.9 cm x 5.6 cm, low-density collection within the retrocrural/posterior mediastinal region abutting the descending thoracic aorta along 180 degrees of circumference of the vessel (Fig. 1).
PMC6319523_02
Seventy three year old male with mycotic aneurysm of the abdominal aorta. a Axial and b sagittal images of a portal venous phase exam showing peripherally enhancing hypoattenuating periaortic mass with a focal out pouching arising from the posterior wall of the aorta consistent with a psuedoaneurysm. Post-surgical repair c axial and d sagittal images of CTA show unremarkable superficial femoral vein graft with no residual psuedoaneurysm
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Fig2
At this level, a focal outpouching arising from the aorta posteriorly measuring up to 0.8 cm x 2.2 cm x 0.9 cm (APxTRVxCC) was suspicious for a mycotic aneurysm (Fig. 2).