Buchanan L D, Holden W
J Am Osteopath Assoc. 1989 Aug;89(8):1069-72, 1077-8.
Inflammatory aortic aneurysms are aneurysms that are surrounded by a variable amount of periaortic fibrosis. This periaortic fibrosis may involve abdominal viscera, such as the duodenum, inferior vena cava, renal veins, or ureters, to a variable degree. On ultrasonographic images, the periaortic fibrosis appears as a hypoechoic mass surrounding the anterior and anterolateral aspects of a dilated aorta. Computed tomography scans reveal a periaortic mass of inflammatory tissue surrounding a dilated atherosclerotic and thickened aorta. The inflammatory mass may enhance to the same extent or slightly less than the aortic lumen following intravenous administration of a contrast agent. Magnetic resonance imaging scans may show the periaortic mass of inflammatory tissue to have a pseudocapsule of compressed fat at its periphery. Recognition of this entity and the extent of the inflammatory process is important to the definitive management of this condition, as illustrated by the case presented.
炎性主动脉瘤是一种被不同程度的主动脉周围纤维化所包绕的动脉瘤。这种主动脉周围纤维化可能不同程度地累及腹部脏器，如十二指肠、下腔静脉、肾静脉或输尿管。在超声图像上，主动脉周围纤维化表现为围绕扩张主动脉前侧和前外侧的低回声肿块。计算机断层扫描显示围绕扩张的动脉粥样硬化且增厚主动脉的炎性组织的主动脉周围肿块。静脉注射造影剂后，炎性肿块的强化程度可能与主动脉管腔相同或略低于主动脉管腔。磁共振成像扫描可能显示炎性组织的主动脉周围肿块在其周边有一层受压脂肪形成的假包膜。如所举病例所示，认识这一实体以及炎症过程的范围对该疾病的明确治疗很重要。
