Familial retinoschisis in female patients

Area of Science:

• Ophthalmology
• Genetics
• Retinal Diseases

Background:

• Juvenile retinoschisis is a genetic disorder typically affecting males, characterized by retinal schisis.
• X-linked recessive inheritance is the usual pattern for juvenile retinoschisis.
• This study investigates a rare familial case with atypical presentation.

Observation:

• Two female patients, a mother and daughter, presented with bilateral foveal changes.
• The daughter exhibited peripheral and foveal retinoschisis with inner-layer breaks and optic disc anomalies.
• The mother presented with foveal retinoschisis and retinal breaks with detachment in one eye.

Findings:

• Electrophysiological testing revealed decreased b-wave amplitude in electroretinograms (ERG) and subnormal visually evoked potentials (VEP).
• Ophthalmoscopic and electrophysiologic findings were consistent with X-linked retinoschisis but atypical.
• Genetic analysis suggested autosomal dominant inheritance, differing from typical X-linked patterns.

Implications:

• The findings challenge the established characteristics of X-linked recessive juvenile retinoschisis.
• These cases may represent a novel clinical entity or a variant of retinoschisis.
• Further research is needed to understand the genetic basis and clinical spectrum of this condition.