Optic Nerve Hypoplasia and Crouzon Syndrome

Area of Science:

• Genetics
• Ophthalmology
• Pediatrics

Background:

• Crouzon syndrome is the most frequent cause of syndromic craniosynostosis, characterized by premature fusion of cranial sutures.
• Syndromic craniosynostosis often presents with complex craniofacial abnormalities and potential associated medical conditions.
• Optic nerve hypoplasia is a congenital condition where the optic nerve is underdeveloped.

Observation:

• A male infant presented with dysmorphic features, bilateral choanal stenosis, and bilateral optic nerve hypoplasia.
• The infant required respiratory support due to choanal stenosis, with a complicated management course.
• Genetic testing confirmed a molecular diagnosis of Crouzon syndrome.

Findings:

• This case report details a previously unreported association between Crouzon syndrome and optic nerve hypoplasia.
• The presence of optic nerve hypoplasia in Crouzon syndrome is considered uncommon.
• The infant's presentation highlights the variability of clinical manifestations in Crouzon syndrome.

Implications:

• The association of optic nerve hypoplasia necessitates a modified initial diagnostic work-up for infants with Crouzon syndrome.
• Recognizing this association is crucial for managing parental expectations regarding potential visual impairments.
• Further research may elucidate the underlying mechanisms connecting Crouzon syndrome and optic nerve development.