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Atypical corneal immunoglobulin deposition in a patient with dysproteinemia
Alice Y Matoba1, Patricia Chevez-Barrios, Dan B Jones
1Cullen Eye Institute, Baylor College of Medicine, Department of Ophthalmology, Houston, TX 77030, USA. amatoba@bcm.edu
Purpose:
The purpose of this study was to report an unusual pattern of immunoglobulin deposition in the corneas of a patient with dysproteinemia.
Methods:
Clinical examination, slit lamp examination, a deep lamellar corneal biopsy, and serum and aqueous protein electrophoresis were obtained.
Results:
Slit lamp evaluation revealed amorphous, cloud-like opacities in the midperiphery at the level of deep stroma and Descemet's membrane. Electron microscopy demonstrated deep lamellar extracellular deposits consistent with immunoglobin. The serum protein electrophoresis revealed a monoclonal IgG kappa band, but the aqueous electrophoresis showed no bands in the gamma region.
Conclusion:
This case documents a rare pattern of immunoglobulin deposition in the corneas in a patient with gammopathy. Despite its deep corneal distribution, the analysis of the aqueous specimen suggests that the source of the immunoglobulin is through a route other than from the aqueous.
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