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Conjunctival ultrastructure in Niemann-Pick disease type C
American Journal of Ophthalmology
|November 1, 1980
Summary
Conjunctival ultrastructure in Niemann-Pick disease type C reveals characteristic lamellar cytoplasmic bodies. This finding, alongside ocular observations, aids in diagnosing Niemann-Pick disease subtypes.
Area of Science:
- Ophthalmology
- Cell Biology
- Genetics
Background:
- Niemann-Pick disease type C is a rare genetic disorder affecting cellular lipid metabolism.
- Ocular manifestations are varied, and early diagnosis is crucial for management.
Observation:
- A 5-year-old girl diagnosed with Niemann-Pick disease type C presented with normal ocular examination.
- However, electron microscopy of conjunctival tissue revealed significant ultrastructural abnormalities.
Findings:
- Characteristic lamellar cytoplasmic bodies, a hallmark of Niemann-Pick disease, were identified in multiple conjunctival cell types, including epithelial cells, stromal fibroblasts, endothelial cells, and pericytes.
- Abnormalities in the capillary basement membrane (multilayered) and a well-developed Golgi apparatus were also noted.
Implications:
- Conjunctival ultrastructure analysis, particularly the presence of lamellar cytoplasmic bodies, can be a valuable diagnostic tool for Niemann-Pick disease type C.
- This approach may assist in the differential diagnosis of Niemann-Pick disease and its subtypes, especially when overt ocular signs are absent.