Description:
<jats:p>What is already known about the topic?
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<jats:list-item><jats:p>Right aortic arch (RAA) has an association with extracardiac and chromosomal anomalies.</jats:p></jats:list-item>
<jats:list-item><jats:p>RAA with left arterial duct can form a vascular ring.</jats:p></jats:list-item>
<jats:list-item><jats:p>In children with RAA, there is poor correlation of symptoms and tracheal compression.</jats:p></jats:list-item>
</jats:list></jats:p><jats:p>What does this study add?
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<jats:list-item><jats:p>The majority of prenatal cases of an isolated RAA in our cohort are identified during routine screening.</jats:p></jats:list-item>
<jats:list-item><jats:p>Microdeletion of chromosome 22q11 is the most common genetic association with an apparently isolated RAA, it is seen in a minimum of 7% of cases.</jats:p></jats:list-item>
<jats:list-item><jats:p>A chromosomal or genetic anomaly is found in half of fetuses with RAA and increased nuchal translucency thickness (NT) and in one‐fifth of those with normal NT.</jats:p></jats:list-item>
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