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Severe Eyelid Malformation With Facial Clefting and Amniotic Bands
Jenny C Dohlman1,2, Alexandra T Elliott2
1Department of Ophthalmology, Krieger Eye Institute/Sinai Hospital of Baltimore, Baltimore, Maryland.
Insights
A novel SMOC1 gene mutation may underlie amniotic band sequence, causing severe eyelid colobomas and facial clefts. This finding expands understanding of the genetic causes for these complex congenital malformations.
Area of Science:
- Ophthalmology
- Genetics
- Developmental Biology
Background:
- Amniotic bands can cause severe eyelid malformations, including eyelid colobomas, often associated with facial clefts.
- The genetic basis for amniotic band sequence and associated eyelid defects remains largely unknown.
- Previous research has not identified a direct genetic link between SMOC1 mutations and amniotic band sequence or eyelid colobomas.
Purpose of the Study:
- To investigate the potential genetic cause of a severe case of amniotic band sequence with eyelid colobomas and facial clefts.
- To describe the reconstructive surgical techniques and outcomes for a patient with extensive eyelid defects.
- To review and expand upon existing theories regarding the etiology of amniotic band sequence.
Main Methods:
- Case report of an infant with severe eyelid colobomas, facial clefts, and amniotic bands.
- Genetic analysis to identify mutations in the SMOC1 gene.
- Detailed description of surgical reconstruction and postoperative management.
- Literature review of amniotic band sequence etiology.
Main Results:
- A novel mutation in the SMOC1 gene was identified in the affected infant.
- The identified SMOC1 mutation has not been previously associated with amniotic band sequence or eyelid colobomas.
- Surgical reconstruction successfully improved the ocular surface and facilitated eye contact, despite poor visual potential.
Conclusions:
- The study suggests a potential genetic link between SMOC1 mutations and amniotic band sequence, expanding the known genetic underpinnings of congenital eyelid malformations.
- Reconstructive surgery can achieve functional and aesthetic improvements in severe cases of eyelid colobomas.
- Further research is warranted to elucidate the role of SMOC1 in normal eyelid development and amniotic band sequence pathogenesis.
Abstract:
Amniotic bands can lead to eyelid colobomas contiguous with facial clefts, resulting in severe and highly variable eyelid malformations. There is no known underlying genetic cause of amniotic band sequence. Here, the authors review the case of an infant born with large, 4-eyelid colobomatous defects in the setting of facial clefts, amniotic bands and an underlying SMOC1 mutation, which has not previously been linked to amniotic band sequence or eyelid colobomas. Reconstructive technique and the postoperative course are described, and underlying etiologic theories of amniotic band sequence are reviewed and expanded upon. Although amblyopia prevention in this patient with poor visual potential was not a consideration, the goals of improving the patient's ocular surface and maintaining eye contact were achieved.
