Multidetector computed tomography findings of abdominal aortic aneurysm and its complications: a pictorial review.

Abdominal aortic aneurysms (AAAs) are defined as abnormal dilatation of the abdominal aorta and are potential to catastrophic complications. With the advent of multidetector computed tomography (MDCT), this diagnostic modality has virtually replaced conventional angiography in many circumstances and has become an integral part of the evaluation of AAA. Its ability to assess the peri-aortic soft tissue and the exact extension of aneurysm as well as its excellent vascular opacification and multiplanar reconstruction make computed tomography angiography the best suited imaging modality for not only detecting AAA but also evaluating its various complications. In this pictorial essay, we intend to demonstrate the spectrum of MDCT findings in AAA and its various consequences including impending rupture, contained rupture, rupture, aorto-caval fistula, aorto-left renal vein fistula, aorto-enteric fistula, and infection. Familiarity with the characteristic imaging features of AAA is essential for clinical radiologists and also referring physicians for the prompt diagnosis of life-threatening complications.