Objective Abdominal aortic aneurysm(AAA) can be divided into symptomatic abdominal aortic aneurysm(sAAA) and asymptomatic abdominal aortic aneurysm (aAAA) according to its manifestations, and the purpose of this study was to investigate the difference and correlation of morphological data of the two groups.Methods January 2013 to January 2019 were included in the study. They were divided into symptomatic group (27 cases) and non-symptomatic group (80 cases) according to whether there was associated back and/or abdominal pain. According to the relevant data of computer tomography angiography (CTA), the differences and correlations of the main morphological indicators (maximum diameter of tumor, neck angle, etc.) between the two groups were analyzed and compared.Results The maximum diameter of the tumor in the sAAA group was greater than that in the aAAA group, with a statistically significant difference [(5.40±1.58) cm vs. (4.73±1.02) cm, P=0.047], for neck length [(2.87±1.27) cm vs. (2.76±1.43) cm, P=0.711] and neck angle (48.06°±36.06° vs. 36.66°±21.65°, P=0.131), with no statistically significant difference between the two groups, and the proportion of eccentric aneurysms was relatively higher in the sAAA group, with a statistically significant difference (51.9% vs. 30.0%, P=0.04). There was a negative correlation between neck length and the maximum diameter of the tumor (rs=-0.36, P<0.01), and a positive correlation between the angle of the neck and the maximum diameter of the tumor (rs=0.258, P=0.007).Conclusion In this study, there were statistically significant differences in the maximum diameter of the tumor, neck length, and geometric variables of neck angle between sAAA and aAAA, and the proportion of eccentric aneurysms was relatively higher in sAAA, which provided support for the aggressive clinical management of sAAA. There is a negative correlation between the length of the neck and the maximum diameter of the tumor, while there is a positive correlation between the angle of the neck and the maximum diameter of the tumor. The morphological variables of abdominal aortic aneurysm are also related to each other and interact with each other. However, the maximum diameter of the tumor alone cannot be used to predict the risk of abdominal aortic aneurysm rupture. It should also be analyzed from the perspective of hemodynamics and pathophysiology, which will make the prediction and determination more scientific.
Key words
Symptomatic abdominal aortic aneurysm /
Non-symptomatic abdominal aortic aneurysm /
Morphology
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