Cyclopia: a radiological and anatomical craniofacial post mortem study.

Area of Science:

• Developmental biology
• Embryology
• Teratology

Background:

• Cyclopia is a rare fetal malformation defined by a single palpebral fissure and proboscis.
• It is invariably associated with severe brain malformations and is not compatible with life.
• The incidence is approximately 1.05 per 100,000 births, including stillbirths.

Purpose of the Study:

• To conduct an anatomical and histological examination of the fronto-orbito-maxillary region in a fetus with cyclopia.
• To investigate the role of trigeminal nerve integrity in facial development.
• To utilize the cyclopic face as a model for studying normal facial embryogenesis.

Main Methods:

• Three-dimensional (3-D) computed tomography (CT) reconstruction of a 21-week-old fetus with cyclopia.
• Detailed anatomical observation of the fronto-orbito-maxillary region.
• Histological analysis of facial structures.

Main Results:

• Observations suggest that the integrity of the trigeminal nerves is crucial for the normal development of facial embryological structures.
• Facial process fusion in the midline occurs even in the absence of central prosencephalic structures.
• The study provides insights into the developmental mechanisms underlying facial formation.

Conclusions:

• The trigeminal nerve plays a significant role in the development of facial structures.
• The facial characteristics of cyclopia offer a unique model for understanding normal facial development.
• Further research into the embryological basis of cyclopia can elucidate fundamental principles of craniofacial morphogenesis.