Congenital fibrosis of the extraocular muscles type 1, distinctive conjunctival changes and intrapapillary disc...

Area of Science:

• Ophthalmology
• Genetics
• Pediatric Neurology

Background:

• Congenital fibrosis of the extraocular muscles type 1 (CFEOM1) is a rare inherited eye movement disorder.
• It is typically caused by mutations in the KIF21A gene, affecting ocular muscle function.

Observation:

• A 6-month-old boy presented with clinical signs of CFEOM1.
• Distinctive conjunctival changes and bilateral optic disc colobomata were observed.
• Genetic analysis identified the common KIF21A mutation associated with CFEOM1.

Findings:

• The patient exhibited typical CFEOM1 symptoms alongside previously unreported conjunctival alterations.
• The presence of bilateral optic disc colobomata was a novel finding in this case.
• These findings suggest a potential new association between CFEOM1 and optic disc colobomata.

Implications:

• This case expands the known clinical spectrum of CFEOM1.
• Optic disc colobomata may be an underrecognized feature of CFEOM1.
• Further research is warranted to elucidate the genetic and developmental links between CFEOM1 and optic disc anomalies.