Tsubouchi Hiromasa, Onishi Hidenori, Maeno Koji, Nakagaichi Masaya, Tsukushi Ikue, Kitano Youichi, Makino Yoshitaka, Hayashi Hiroyuki, Terasawa Hidekazu, Kabuto Hiroko, Misawa Toshihiro, Sanada Taku, Hisada Azusa, Notsumata Kazuo, Okafuji Kazuhiro, Yamamura Osamu
Department of Radiotechnology, Fukui-Ken Saiseikai Hospital, Fukui, Japan.
Department of Community Medicine, Faculty of Medical Science, University of Fukui, Fukui, Japan.
J Clin Ultrasound. 2025 Mar-Apr;53(3):429-435. doi: 10.1002/jcu.23889. Epub 2024 Nov 4.
Isolated abdominal aortic dissection (IAAD) has been reported to account for 1.1%-4.1% of all aortic dissections. If detected late, it is associated with a risk of aortic rupture. We investigated the risk factors and characteristic imaging findings of incidentally discovered IAAD using abdominal ultrasonography (AUS) during health check-up and hereby report our findings.
The study sample included 41 patients with abdominal aortic abnormalities identified by AUS performed during a health check-up at our hospital and who were diagnosed with IAAD by contrast-enhanced computed tomography (CT); in addition, 205 patients were included in the nonevent group. Furthermore, risk factors and characteristic imaging findings of IAAD were examined retrospectively.
Compared with the nonevent group, smoking and fatty liver were observed significantly more frequently in the IAAD group. Ultrasound findings indicated an intimal flap in 35 cases (85.4%), whereas CT scan revealed displacement of intimal calcifications in 32 cases (78.0%).
Compared with the nonevent group, there were significantly more cases of fatty liver and smoking habits in the IAAD group. In older patients with risk factors for fatty liver and smoking habits, if IAAD is suspected, it is important to monitor the abdominal aorta using ultrasonography during health check-ups.
据报道，孤立性腹主动脉夹层（IAAD）占所有主动脉夹层的1.1%-4.1%。如果发现较晚，其与主动脉破裂风险相关。我们利用健康体检期间的腹部超声（AUS）调查了偶然发现的IAAD的危险因素和特征性影像学表现，并在此报告我们的研究结果。
研究样本包括41例在我院健康体检期间经AUS检查发现腹主动脉异常并经增强计算机断层扫描（CT）诊断为IAAD的患者；此外，205例患者被纳入非事件组。此外，对IAAD的危险因素和特征性影像学表现进行了回顾性研究。
与非事件组相比，IAAD组吸烟和脂肪肝的发生率明显更高。超声检查发现35例（85.4%）有内膜瓣，而CT扫描显示32例（78.0%）有内膜钙化移位。
与非事件组相比，IAAD组脂肪肝和吸烟习惯的病例明显更多。在有脂肪肝和吸烟习惯危险因素的老年患者中，如果怀疑有IAAD，在健康体检期间使用超声监测腹主动脉很重要。
