Importance of Early Imaging in Detecting Fetal Structures: A Case Series

Objective: To highlight the vital role of early ultrasound imaging in the first and early second trimesters for detecting fetal structural anomalies and placental abnormalities that significantly impact prenatal counseling and clinical management. Methods: This was a case series of pregnancies evaluated at an academic medical centre. Cases were identified by querying the obstetric ultrasound database for fetuses with structural abnormalities or placental findings detected between 11 to14weeks' gestation. Ultrasound reports, images, medical records, and outcomes were reviewed to compile relevant examples illustrating the range of conditions diagnosed by early imaging. Nuchal translucency (NT) thickness, presence of double aortic arch, and cystic hygroma were evaluated as markers for potential fetal anomalies. Results: In three cases (Cases 1, 2, and 3), the ultrasound findings were normal, with no increased NT thickness, double aortic arch, or cystic hygroma detected. These cases were managed with routine prenatal care. However, in two cases (Cases 4 and 5), increased NT thickness was observed, along with the presence of double aortic arch and cystic hygroma, raising concerns for potential chromosomal or structural abnormalities. These findings prompted further diagnostic investigations and appropriate interventions. Conclusion: Early prenatal imaging plays a crucial role in detecting fetal structural anomalies, such as increased NT thickness, double aortic arch, and cystic hygroma. Timely identification of these markers allows for prompt follow-up investigations, targeted interventions, and comprehensive counseling, ultimately improving fetal and maternal outcomes. This case series underscores the importance of routine prenatal imaging and vigilant monitoring for optimal management of pregnancies with potential fetal anomalies.