| 1. |
- Hammar, Björn, et al.
(författare)
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Dystrophia Smolandiensis: a novel morphological picture of recurrent corneal erosions
- 2010
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Ingår i: Acta Ophthalmologica. - : Wiley. - 1755-3768 .- 1755-375X. ; 88:4, s. 394-400
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: The aim of this study was to describe morphological changes in Dystrophia Smolandiensis, a corneal disease that is characterized by recurrent corneal erosive episodes and the formation of central corneal keloid-like opacities in approximately half of those affected. Methods: The corneas of seven affected individuals were examined using in-vivo confocal microscopy. Specimens of one primary corneal graft, one regraft and one biopsied keloid-like region - all obtained from members of a large family with the disease - were re-examined with a light microscope. Sections were stained with Congo red and analysed immunohistochemically for fibronectin and S100A4. Results: Light microscopic examination revealed epithelial hyperplasia, absence of Bowman's layer and subepithelial fibrosis. Fibronectin was expressed in the area of subepithelial fibrosis, and the keratocytes in this area generally expressed S100A4. The biopsy specimen stained positive for Congo red, suggesting an amyloid deposit. In-vivo confocal microscopy confirmed epithelial abnormalities, loss of Bowman's layer and significant alterations of the subbasal nerve plexus in affected individuals. Conclusion: The morphological picture in Dystrophia Smolandiensis is novel for a condition dominated by recurrent corneal erosions at the clinical level. Although no single morphological feature unique to the disease could be found, the general morphological pattern of pathology (true keloid formation, absence of Bowman's layer, subepithelial fibrosis and abnormal subbasal nerves) probably reflects a novel phenotypic expression of the healing response to recurrent erosion of the corneal epithelium. However, the pathogenesis of Dystrophia Smolandiensis remains to be elucidated fully.
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| 2. |
- Hammar, Björn, 1963-, et al.
(författare)
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Dystrophia Smolandiensis - recurrent corneal erosions with a novel morphological picture
- 2010
-
Ingår i: Acta Ophthalmologica. - : Blackwell. - 1755-375X .- 1755-3768. ; 88:4, s. 394-400
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: The aim of this study was to describe morphological changes in a new corneal disease, Dystrophia Smolandiensis, characterized by recurrent corneal erosive episodes and formation of central corneal keloid-like opacities in approximately half of those affected.Methods: The corneas of seven affected individuals were examined using in-vivo confocal microscopy. Specimens of one primary corneal graft, one regraft, and one biopsied keloid-like region, obtained from members of a large family with the disease, were re-examined with a light microscope, and sections were stained with Congo red and immunohistochemically analyzed for fibronectin and S100A4.Results: Light microscopic examination revealed epithelial hyperplasia, absence of Bowman’s layer and subepithelial fibrosis. Fibronectin was expressed in the area of subepithelial fibrosis, and the keratocytes in this area generally expressed S100A4. The biopsy specimen stained positive for Congo red, suggesting an amyloid deposit. In-vivo confocal microscopy confirmed epithelial abnormalities, loss of Bowman’s layer, and significant alterations of the subbasal nerve plexus in affected individuals.Conclusion: The morphologic picture in Dystrophia Smolandiensis is novel for a condition dominated by recurrent corneal erosions at the clinical level. Although no single morphologic feature unique to the disease could be found, the general morphologic pattern of pathology (true keloid formation, an absence of Bowman’s layer, subepithelial fibrosis, and abnormal subbasal nerves) likely reflects a novel phenotypic expression of the healing response to recurrent erosion of the corneal epithelium. The pathogenesis of Dystrophia Smolandiensis, however, remains to be fully elucidated.
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| 3. |
- Neira, Waldir, et al.
(författare)
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Dystrophia Helsinglandica - corneal morphology, topography and sensitivity in a hereditary corneal disease with recurrent erosive episodes
- 2010
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Ingår i: ACTA OPHTHALMOLOGICA. - : Blackwell Publishing Ltd. - 1755-375X .- 1755-3768. ; 88:4, s. 401-406
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: The aim of this study was to describe the morphology, corneal topography and sensitivity in individuals with Dystrophia Helsinglandica. This autosomal dominant corneal disease is characterized by recurrent corneal erosive episodes and progressive subepithelial fibrosis not significantly affecting visual acuity. Methods: The corneas of nine affected and nine unaffected individuals were examined using slit-lamp biomicroscopy, in vivo confocal microscopy (IVCM) and videokeratography. Corneal mechanical sensitivity was also measured using a non-contact esthesiometer. Results: Slit-lamp biomicroscopy revealed that the affected individuals represented different stages of corneal changes, from a nearly normal cornea to subepithelial fibrosis of the central cornea. Corneal changes in affected individuals did not significantly decrease the best spectacle-corrected visual acuity. In vivo confocal microscopy detected morphological changes in the epithelium and stroma. Subepithelial opacity formation including altered keratocytes could be found in the anterior stroma in all affected eyes. With the exception of two eyes (one affected and one unaffected), all videokeratographies showed irregular astigmatism. Corneal sensitivity was significantly lower in affected individuals (p = 0.01). Age and corneal sensitivity showed no correlation. Conclusion: The main morphological findings in affected individuals were discrete and progressive subepithelial fibrosis, in the in vivo confocal microscope corresponding to optically dense extracellular matrix and activated keratocytes. Subbasal nerve morphology was changed in the affected family members who also showed a decreased corneal sensitivity. The findings are per se not specific to the disease. The changes probably reflect a healing response to erosive events on the corneal surface influenced by the genotype.
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