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Indications for Systemic and Genetic Testing in Patients with Congenital Cataracts
Reem Amine1, Elias I Traboulsi1
1Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio.
Insights
Genetic factors cause many childhood cataracts, a leading cause of pediatric blindness. Identifying these genetic causes is crucial for diagnosis, counseling, and managing associated health issues.
Area of Science:
- Ophthalmology
- Genetics
- Pediatrics
Background:
- Congenital cataracts are a major cause of childhood blindness globally.
- Approximately 12-136 per 100,000 births are affected worldwide.
- Genetic factors are implicated in a significant proportion of congenital cataracts, leading to isolated or syndromic forms.
Purpose of the Study:
- To highlight the genetic basis of congenital cataracts.
- To present case examples of genetically determined childhood cataracts.
- To review the diagnostic work-up for these conditions.
Main Methods:
- Review of genetic literature on congenital cataracts.
- Presentation of two clinical case examples.
- Discussion of diagnostic approaches for genetic cataracts.
Main Results:
- Numerous genes (e.g., crystallins, connexins, aquaporins) are associated with congenital cataracts.
- Genetic etiology is key to understanding disease pathways.
- Genetic identification enables personalized counseling and management.
Conclusions:
- Identifying the genetic cause of congenital cataracts is vital.
- This knowledge aids in understanding disease mechanisms.
- It facilitates tailored genetic counseling and management of associated systemic conditions.
Abstract:
Congenital cataracts account for a significant proportion of blindness in children worldwide. They affect approximately 12-136 per 100,000 births worldwide. A genetic etiology is present in a large proportion of patients and can lead to isolated cataracts or those in the context of genetic multisystem disorders. We present two examples of genetically determined childhood cataracts and briefly review the work-up of such patients. Mutations in numerous genes have been identified that cause congenital cataracts, such as those encoding for crystallins, connexins and aquaporins, as well as some developmental regulatory proteins. Identifying the genetic or molecular etiology of congenital cataract is essential for identifying and better understanding the pathways leading to this disease, and for providing individualized genetic counseling and guiding treatment for possible associated systemic problems.
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