Peri-aneurysmal retroperitoneal fibrosis
Peri-aneurysmal retroperitoneal fibrosis is a subtype of a spectrum of retroperitoneal fibrosis. It is characterised by association with an inflammatory aneurysm, adventitial and peri-adventitial inflammation, medial thinning and chronic retroperitoneal inflammatory process which is associated with a varying degree of fibrotic reactions surrounding the abdominal aorta.
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