EP09.24: Analysis of prenatal ultrasound diagnosis and missed misdiagnosis of fetal aortic arch dissection

To summarise the ultrasound characteristics of fetal aortic arch dissection and analyse the reasons for missed diagnosis and misdiagnosis in order to improve the accuracy of prenatal ultrasound diagnosis. The prenatal data of 28 fetuses with postnatal confirmation of aortic arch dissection were retrospectively analysed to summarise the prenatal ultrasonographic features and diagnostic methods of aortic arch dissection, and to analyse the reasons for misdiagnosis. 28 fetuses with aortic arch dissection included 13 cases of type A, 13 cases of type B and 2 cases of type C. The prenatal ultrasound features were: loss of continuity between the aortic arch and the descending aorta, markedly small aorta, abnormal ratio of the aorta to the pulmonary artery, ventricular septal defect, thick arterial ductal arches that could easily be visualised, and cephalic and brachial arteries that could emanate from the aorta. The diagnostic accuracy was 92.8%, with a 3.6% miss and misdiagnosis rate, and 10.7% of the accompanying intracardiac malformations were missed. Prenatal ultrasound findings of aortic arch dissection require comprehensive scanning to accurately diagnose combined intracardiac malformations and syndromes and to differentiate them from aortic constriction, as well as to be alert for progression of aortic constriction leading to aortic arch dissection. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.