Imagerie des anévrismes infectieux (mycotiques) de l'aorte abdominale

Infected aortic aneurysms are rare, accounting for 0.7 to 1.3% of all aortic aneurysms, but are a potentially disastrous lesion raising the risk of both uncontrolled sepsis and aortic rupture. Clinical manifestations are variable and non specific, including aneurysm rupture as well as persistent fever. Imaging features of infected aortic aneurysms often suggest the diagnosis. Saccular aneurysms (especially those with a lobulated contour) in an unusual location, with rapid expansion, periaortic inflammation and absence of calcification or mural thrombus, are highly suggestive of infection. Emergency treatment is required, associating antibiotic therapy and surgical management.