What genetic condition is often screened for due to its association with cardiac defects and dysmorphic features?

Down syndrome, also known as Trisomy 21, is frequently screened for because of its well-established association with a variety of congenital cardiac defects, such as atrioventricular septal defects, ventricular septal defects, and other heart malformations. In addition to these cardiac issues, individuals with Down syndrome often exhibit dysmorphic features, which may include a flat facial profile, slanted eyes, a short neck, and a protruding tongue. These characteristics are important markers for early diagnosis.

Screening for Down syndrome is typically performed during the first trimester through non-invasive prenatal testing or ultrasound assessments, seeking markers like nuchal translucency. Early identification is crucial as it aids in the management of potential health complications associated with the syndrome, facilitating timely interventions within multidisciplinary care frameworks.

While the other conditions listed also have significant clinical manifestations, they do not have the same level of association with congenital heart defects and dysmorphic features as Down syndrome does, making it the primary focus for screening in prenatal and pediatric settings.