Prenatal Ultrasound Imaging of Orofacial Clefts: A Pictorial Essay

Orofacial clefts (OFCs), including cleft lip (CL), cleft palate (CP), and CL with palate (CL/P), are relatively common congenital birth defects occurring in approximately 1 in 500 to 1 in 2500 live births. Detecting OFCs during prenatal ultrasound screening is crucial for informed decision-making and multidisciplinary medical care. This review provides a practical guide for routine and advanced screening for OFCs during mid-pregnancy. The Maarse classification system facilitates effective communication among the multidisciplinary team, categorizing OFCs into five types. Basic ultrasound views encompass coronal, sagittal, and axial imaging of the face and hard palate. Additional visualization techniques are employed in case of suspected anomalies during the initial screening. Advanced ultrasound views provided by the expert in prenatal OFC diagnosis include imaging of the posterior edge of the hard palate and the posterior part of the soft palate. Detected OFCs exhibit a range of severity and affect different structures, underscoring the importance of accurate detection and classification for appropriate treatment planning. Implementing a standardized screening protocol for OFCs is essential. By enhancing detection rates and enabling early diagnosis, prenatal ultrasound screening contributes to improved patient outcomes and facilitates timely intervention by the multidisciplinary team. In conclusion, this review emphasizes the significance of standardized protocols and specialized techniques for prenatal ultrasound screening of OFCs. Early detection and classification of these malformations play a vital role in comprehensive management, ensuring that affected individuals and their families receive the appropriate care and support they need.