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Degeneratio corneae nivalis. Snow-crystal degeneration
Metabolic Ophthalmology, Pediatric and Systemic
|January 1, 1984
Summary
An elderly woman developed corneal calcification and conjunctival calcium deposits, alongside arthrosis and osteopoikilosis. This case is compared to artificially induced calcification in rats, suggesting a metabolic link.
Area of Science:
- Ophthalmology
- Rheumatology
- Biochemistry
Background:
- Corneal calcification can be associated with systemic conditions.
- Connective tissue disorders may involve abnormal mineral deposition.
- Understanding metabolic pathways is crucial for explaining pathological calcification.
Observation:
- An aged woman presented with ivory-white, opaque granules in the corneal stroma and subconjunctival calcium deposits.
- Radiographic examination revealed generalized arthrosis and osteopoikilosis affecting the proximal femur.
- The patient's condition shares similarities with experimentally induced calcification syndromes.
Findings:
- The patient's syndrome was compared to calcification induced in rats by isoproterenol, 5-hydroxytryptamine, and dihydrotachysterol.
- These compounds, normally present in the body, induced abnormal connective tissue calcification when administered in sequence.
- The mechanism is hypothesized to involve a metabolic disturbance of mucopolysaccharides.
Implications:
- This case highlights a potential link between systemic metabolic disturbances and ocular calcification.
- Further research into mucopolysaccharide metabolism may reveal therapeutic targets for abnormal calcification disorders.
- The study provides insights into the pathogenesis of rare connective tissue calcification syndromes.