Prenatal Ultrasound Approach to Auricular Anomalies and Preauricular Tags: A Structured Imaging-Based Diagnostic...

Area of Science:

• Medical Imaging
• Fetal Medicine
• Clinical Genetics

Background:

• Auricular anomalies, such as microtia and preauricular tags (PATs), are often missed on prenatal ultrasound.
• These anomalies can be early indicators of significant craniofacial and multisystem disorders.
• Differentiating isolated anomalies from syndromic conditions poses a diagnostic challenge in fetal medicine.

Purpose of the Study:

• To propose a practical, imaging-driven diagnostic framework for evaluating fetal auricular anomalies.
• To integrate high-resolution ultrasound findings with anatomical assessment and molecular genetics.
• To aid in distinguishing syndromic from isolated auricular anomalies.

Main Methods:

• A case-based review integrating a decade of clinical experience.
• Systematic assessment of key craniofacial regions: auricle/pretragal area, mandible, zygomatic-mandibular complex.
• Evaluation of craniofacial symmetry and targeted extra-craniofacial screening, combined with genetic testing insights.

Main Results:

• Syndromes associated with microtia and PATs are categorized into branchial arch disorders, overlapping syndromic entities, and non-specific auricular findings.
• The proposed framework facilitates pattern recognition to refine differential diagnoses.
• Detailed morphological assessment remains crucial, as molecular genetics yield is limited in some conditions like craniofacial microsomia.

Conclusions:

• An integrated imaging-genomic approach provides a framework for improved diagnostic orientation, prenatal counseling, and perinatal management.
• Ultrasound plays a central role in navigating the complexity of prenatal auricular anomalies.
• This strategy enhances the diagnostic utility of ultrasound in identifying syndromic conditions.