Echogenic line in the cavum septi pellucidi: variant of normal or marker of underlying genetic disorder?

The data that support the findings of this study are available from the corresponding author upon reasonable request. Figure S1 Three-dimensional multiplanar image correlation showing echogenic line in the cavum septi pellucidi at 19 + 6 weeks' gestation. Figure S2 Flowchart summarizing prenatal genetic diagnosis and outcome of included cases. Normal outcome defined as live birth without major congenital anomalies and normal postnatal growth and neurodevelopment at follow-up (at least 6 weeks postpartum). Table S1 Cases with isolated echogenic line in cavum septi pellucidi (CSP). Cases are numbered chronologically in order of diagnosis between 2019 and 2025, with Case 1 being the index case in 2015. 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.