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Cyclopia: an anatomic and histologic study of two specimens
Teratology
|October 1, 1982
Summary
This study examined two cyclopic neonates, revealing a complete absence of ethmoidal cartilage skeletal derivatives. This developmental anomaly resulted in significant craniofacial malformations, including absent nasal cavities and choanal atresia.
Area of Science:
- Craniofacial Development
- Developmental Biology
- Human Embryology
Background:
- Cyclopia is a rare congenital disorder characterized by a single ocular orbit.
- Understanding the developmental basis of craniofacial anomalies is crucial for clinical management.
Observation:
- Detailed study of two neonatal human cyclopic specimens with a single ocular opening.
- One specimen presented a midline proboscis; the other lacked external nasal development.
Findings:
- Absence of all skeletal derivatives of the ethmoidal cartilage (cribriform plate, perpendicular plate, nasal conchae, medial orbital walls, nasal septal cartilage).
- Consequent absence of the nasal cavity and fusion of maxillae and vomer.
- Medial pterygoid plates merged, causing choanal atresia.
Implications:
- Highlights the critical role of ethmoidal cartilage in forming nasal structures and medial orbital walls.
- Provides insights into the complex interplay of skeletal development in the craniofacial region.
- Informs understanding of severe craniofacial malformations and their embryological origins.