Autosomal dominant cataract: intrafamilial phenotypic variability, interocular asymmetry, and variable progression in four Chilean families.
OBJECTIVE
To document intrafamilial and interocular phenotypic variability of autosomal dominant cataract (ADC).


METHODS
Prospective observational case series.


METHODS
We performed ophthalmologic examination in four Chilean ADC families.


RESULTS
The families exhibited variability with respect to morphology, location with the lens, color and density of cataracts among affected members. We documented asymmetry between eyes in the morphology, location within the lens, color and density of cataracts, and a variable rate of progression.


CONCLUSIONS
The cataracts in these families exhibit wide intrafamilial and interocular phenotypic variability, supporting the premise that the mutated genes are expressed differentially in individuals and between eyes; other genes or environmental factors may be the bases for this variability. Marked progression among some family members underscores the variable clinical course of a common mutation within a family. Like retinitis pigmentosa, classification of ADC will be most useful if based on the gene and specific mutation.
Department of Ophthalmology, Children's Hospital, Rocky Mountain Lions Eye Institute, University of Colorado Health Sciences Center, Denver, Colorado, USA.
Suraiya M
SM
Shafie
Fernando R
FR
Barria von-Bischhoffshausen
J Bronwyn
JB
Bateman
D002386:Cataract / Q000235:genetics* / Q000473:pathology; D002677:Chile; D018450:Disease Progression; D005190:Family; D005799:Genes, Dominant; D014644:Genetic Variation; D006801:Humans; D007908:Lens, Crystalline / Q000473:pathology; D010641:Phenotype