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A rare type of Usher's syndrome
Acta Clinica Croatica
|April 5, 2014
Summary
This case study highlights a rare presentation of Usher syndrome in a pregnant woman, involving retinitis pigmentosa sine pigmento and significant vision loss. Early diagnosis and further research are crucial for managing this rare genetic disorder.
Area of Science:
- Ophthalmology
- Genetics
- Audiology
Background:
- Usher syndrome is a genetic disorder characterized by hearing loss and retinitis pigmentosa.
- Retinitis pigmentosa sine pigmento is a rare subtype lacking visible pigment deposits.
- Pregnancy can influence the progression or manifestation of certain medical conditions.
Observation:
- A 30-year-old pregnant woman presented with recent-onset left eye visual impairment.
- Ophthalmologic examination revealed optic disc pallor, narrowed retinal vessels, macular edema, and vitreous abnormalities.
- Visual field testing showed significant peripheral vision loss, and electroretinography confirmed retinitis pigmentosa sine pigmento.
Findings:
- The patient was diagnosed with a very rare form of Usher syndrome during her 28th week of pregnancy.
- Childhood hearing disorders were identified retrospectively, confirming the Usher syndrome diagnosis.
- This specific presentation of retinitis in Usher syndrome has been documented only once previously.
Implications:
- This case underscores the importance of comprehensive ophthalmologic and audiology evaluations for diagnosing Usher syndrome, even in atypical presentations.
- Understanding the impact of pregnancy on Usher syndrome progression is vital for patient management.
- Further case reports are needed to elucidate the full spectrum and prevalence of this rare subtype.
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