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Clinical biochemical and pathologic correlations in Bietti's crystalline dystrophy
M I Kaiser-Kupfer1, C C Chan, T C Markello
1National Eye Institute, National Institutes of Health, Bethesda, Maryland 20892.
American Journal of Ophthalmology
|November 15, 1994
Summary
Bietti's crystalline retinopathy involves crystalline deposits in the eye. This study identified crystalline lysosomal material in affected family members, aiding diagnosis.
Area of Science:
- Ophthalmology
- Genetics
- Cell Biology
Background:
- Bietti's crystalline retinopathy is a rare genetic disorder.
- Characterized by lipid crystal deposition in the retina and choroid.
- Genetic basis and precise biochemical defect remain incompletely understood.
Observation:
- Examined three Chinese-American family members with Bietti's crystalline retinopathy.
- Detailed clinical comparison between a proband and her grandmother with 26 years of follow-up.
- Identified crystalline lysosomal material in lymphocytes and fibroblasts from a skin biopsy.
Findings:
- Biochemical analysis failed to identify specific stored compounds, ruling out cholesterol and cholesterol esters.
- Histopathology revealed advanced retinal and choroidal atrophy.
- Crystals and complex lipid inclusions were observed in choroidal fibroblasts.
Implications:
- Confirms the presence of crystalline lysosomal material in Bietti's disease.
- Highlights the utility of skin biopsy for diagnostic support.
- Further research needed to elucidate the exact biochemical defect in Bietti's crystalline retinopathy.