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Which of the following are true regarding inflammatory aneurysm of the abdominal aorta?
a) Periaortic fibrosis usually appears as a well defined soft tissue mass
b) Fibrosis typically spares the posterior aorta
c) Extension into the pelvis is a feature
d) On computed tomography (CT). periaortic fibrosis enhances avidly following
intravenous contrast
e) On MRI, periaortic fibrosis gives typically high signal on T1-weighted imaging

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