Regressive Retinal Flecks in CRX-Mutated Early-Onset Retinal Dystrophy

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Abstract

Purpose

To describe a peculiar flecked-retina phenotype in a young female affected by early-onset retinal dystrophy due to a heterozygous mutation in the cone-rod transcription factor CRX gene.

Case Report

A 5-year-old girl presented with poor vision and nystagmus from the first month after birth. Opththalmologic examination at baseline revealed an altered foveal reflex, epiretinal membrane, and yellow fleck-like retinal deposits in the mid- and extreme periphery bilaterally that disappeared after 3 years of follow-up. Electoretinogram was non-recordable in both rods and cones components bilaterally. Genomic sequencing identified a heterozygous missense mutation −c.425A > G (Tyr142Cys) in CRX.

Conclusions

We identified a novel early-onset retinal dystrophy-related heterozygous CRX mutation associated with early and severe rod and cone dysfunction and regressive flecked-retina appearance on ophthalmoscopy.

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