The natural history of celiac artery aneurysms.

ObjectivesThe goal of this study was to document the natural history of celiac artery aneurysms (CAAs).BackgroundCeliac artery aneurysms are rare. Existing literature is skewed towards outcomes after intervention of large, symptomatic aneurysms but the behavior of untreated CAAs is poorly understood.MethodsThis is a single institution, retrospective analysis of patients with CAA diagnosed by CT imaging (2015-2019) identified through an institutional radiology database. Radiologic, demographic, and follow-up data were analyzed. The primary endpoint was the mean growth rate of CAAs.ResultsOf the 76 patients included, 86.8% were men with a mean age at presentation of 69.8 years. The mean CAA diameter on index imaging was 15.4 +/- 3.8 mm (range, 7-30 mm). All were classified as true aneurysms and 76.3% were saccular. All patients had clinical follow-up with mean follow-up 31.2 months +/- 21.6 months. No patient developed symptoms or rupture. The mean radiological follow-up among 45 patients was 25.2 +/- 16.8 months. Over this period, 16 CAAs (35.6%) enlarged, while 29 (64.4%) remained stable. One patient (1.3%) underwent intervention for increasing size in the setting of a chronic dissection. On multivariate analysis, age <70 was significantly associated with increased risk of aneurysm growth.ConclusionsIn this institutional review of patients with CAAs, the majority of aneurysms remained stable in size, with no patients developing symptoms or rupture over clinical follow-up. Given the observed benign behavior of these aneurysms, guidelines that suggest conservative management of CAAs less than 2 cm seems appropriate.