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Anophthalmos and first branchial arch defects
Insights
This study reports a rare case of unilateral mandibulofacial dysostosis and anophthalmos, highlighting the impact of first branchial arch development on ocular structures.
Area of Science:
- Craniofacial development
- Ophthalmology
- Genetics
Background:
- First branchial arch syndrome encompasses a spectrum of congenital anomalies affecting the mandible, maxilla, and ear.
- Ocular development can be secondarily affected by first branchial arch abnormalities.
- Mandibulofacial dysostosis is a condition characterized by underdevelopment of the midface and mandible.
Observation:
- A six-month-old infant presented with right-sided anophthalmos, orbital hypoplasia, and mandibular and maxillary hypoplasia.
- Associated anomalies included a right external ear deformity, cyanotic heart disease, hemivertebrae, and left eye cataract with corneal opacity.
- This case represents a severe manifestation of first branchial arch developmental disruption impacting the ipsilateral eye and orbit.
Findings:
- The case demonstrates a significant correlation between first branchial arch malformations and severe ocular and orbital defects.
- This finding supports the hypothesis that abnormal development of the first branchial arch influences the development of the orbit and globe.
- The spectrum of effects ranges from severe anophthalmos to subtle retinal pigment epithelium anomalies.
Implications:
- Understanding the link between branchial arch and ocular development is crucial for diagnosing and managing related congenital conditions.
- This case underscores the importance of a comprehensive evaluation in patients with craniofacial anomalies.
- Further research into the genetic and molecular mechanisms underlying these associations is warranted.
Abstract:
The association of unilateral mandibulofacial dysostosis and anophthalmos at the same side is reported. The proband presented at the age of six months with: right anophthalmos and hypoplasia of the orbit at the same side, hypoplasia of the right mandible and maxilla, right external ear deformity, cyanotic heart disease, hemivertebrae, cataract and corneal opacity in the left eye. This case shows the maximal effect of the abnormal development of the first branchial arch (the mandible, maxilla, and ears) on the globe and the orbit. The other end of the spectrum in which the minimal effect on the globe was present (unilateral absence of choriocapillaris and retinal pigment epithelium inferiorly) was reported by Cotlier & Alghadyan in 1981. This supports the concept that abnormal development of the mandible may influence the development of the orbit and the globe. The extent of the influence of the abnormal developing first branchial arch on the eye is discussed.