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Variable phenotypic expressivity of Best's vitelliform dystrophy

A Loewenstein1, V Godel, L Godel

  • 1Department of Ophthalmology, Ichilov Hospital, Tel Aviv, Israel.

Ophthalmic Paediatrics and Genetics
|September 1, 1993
PubMed
Summary
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Best's vitelliform macular dystrophy (BVMD) shows autosomal dominant inheritance with variable expressivity. Asymptomatic patients may have extrafoveal deposits, indicating a broader spectrum of this genetic eye disorder.

Area of Science:

  • Ophthalmology
  • Medical Genetics

Background:

  • Best's vitelliform macular dystrophy (BVMD) is a hereditary macular disease.
  • Understanding its genetic basis and clinical presentation is crucial for diagnosis and management.

Observation:

  • Ophthalmoscopic and electrophysiological investigations were performed on two families with BVMD.
  • Pedigree analysis was used to trace the inheritance pattern.

Findings:

  • Autosomal dominant inheritance was confirmed for BVMD.
  • Variable expressivity was observed, with some asymptomatic individuals exhibiting extrafoveal vitelline deposits.

Implications:

  • Extrafoveal vitelline deposits may be an early or subclinical sign of BVMD.
  • Recognizing variable expressivity can improve diagnostic accuracy and genetic counseling for families with BVMD.

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