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Autosomal dominant cone-rod dystrophy with negative electroretinogram

N Fujii¹, T Shiono, Y Wada

¹Department of Ophthalmology, Tohoku University, School of Medicine, Sendai, Japan.

The British Journal of Ophthalmology

|October 1, 1995

Summary

This study describes a unique Japanese family with autosomal dominant cone-rod dystrophy presenting a negative electroretinogram (ERG). This finding expands the known spectrum of hereditary retinal disorders with negative ERG patterns.

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Area of Science:

Ophthalmology
Genetics
Retinal Diseases

Background:

Negative electroretinograms (ERG) are characteristic of several hereditary retinal disorders.
Autosomal dominant cone-rod dystrophy typically presents with different ERG findings.

Observation:

A Japanese family with autosomal dominant cone-rod dystrophy exhibited a negative ERG.
The proband showed bull's eye maculopathy and decreased visual acuity.
Affected family members, including one with no fundus changes, displayed negative ERG responses.

Findings:

Molecular analysis revealed no mutations in the rhodopsin or peripherin/RDS genes.
The observed negative ERG in this family is a previously undescribed feature of autosomal dominant cone-rod dystrophy.

Implications:

This case expands the clinical and electrophysiological spectrum of autosomal dominant cone-rod dystrophy.
Further research is needed to identify the genetic basis of this specific ERG abnormality.
Highlights the importance of ERG in diagnosing hereditary retinal conditions.