Arrivé L, Corréas J M, Lesèche G, Ghebontni L, Tubiana J M
Department of Radiology, Hôpital Saint-Antoine, Paris, France.
AJR Am J Roentgenol. 1995 Dec;165(6):1481-4. doi: 10.2214/ajr.165.6.7484591.
Inflammatory aneurysm of the abdominal aorta (IAAA) is a variant of atherosclerotic aneurysm that is characterized by inflammatory and/or fibrotic changes in the periaortic regions of the retroperitoneum [1, 2]. These inflammatory and/or fibrotic changes are probably the result of a local autoallergic reaction to certain components of atherosclerotic plaques [2]. This distinct entity has important implications, as the periaortic fibrotic tissue adherent to ureters, the duodenum, and the inferior vena cava may complicate surgical repair [1, 2]. The purpose of this essay is to illustrate the CT appearance of IAAA, with emphasis on the identification of IAAA and differentiation from conventional aortic aneurysms, evaluation of the involvement of adjacent structures by the periaortic fibrosis, and evaluation of the retroperitoneum after aneurysmal repair to analyze the resolution or the persistence of the periaortic fibrosis.
腹主动脉炎性动脉瘤（IAAA）是动脉粥样硬化性动脉瘤的一种变体，其特征是腹膜后主动脉周围区域出现炎症和/或纤维化改变[1,2]。这些炎症和/或纤维化改变可能是对动脉粥样硬化斑块某些成分的局部自身免疫反应的结果[2]。这种独特的实体具有重要意义，因为附着于输尿管、十二指肠和下腔静脉的主动脉周围纤维化组织可能使手术修复复杂化[1,2]。本文的目的是阐述IAAA的CT表现，重点在于IAAA的识别以及与传统主动脉瘤的鉴别、评估主动脉周围纤维化对相邻结构的累及情况，以及评估动脉瘤修复术后腹膜后情况以分析主动脉周围纤维化的消退或持续情况。
