Fusiform dissecting aneurysm of infrarenal abdominal aorta

63 yr female presented with lower abdomen pain. Ultrasound abdomen showed aneurysm of abdominal aorta.

CECT abdomen findings

• Tortuous infrarenal abdominal aorta. Mild atherosclerotic wall calcifications in abdominal aorta.
• Fusiform dissecting aneurysm of infrarenal abdominal aorta with intimal flap.
• The aneurysm with dissection is extending from the level of origin of right renal artery to bilateral proximal external iliac arteries (left > right).
• Maximum diameter of aneurysm measures 5 cm.
• Intimal flap noted within the aneurysm with large anterior false lumen and small posterior true lumen.
• Inferior mesenteric artery is seen arising from the false lumen and opacified normally.
• The aneurysm is abutting and displacing the second part of duodenum anteriorly.
• Posteriorly the aneurysm is abutting and compressing the IVC and left renal vein.
• No evidence of mural hematoma or periaortic hematoma.
• No peri-aneurysmal fat stranding or retroperitoneal inflammatory changes.
• No evidence of active contrast extravasation.

Shared for knowledge sharing. Patient details have been removed. This is not medical advice.