Cataracta ossea - Ultrastructural and specimen analysis

Koinzer, Stefan, Scharpenack, Pia, Katzke, H., Leuschner, Ivo and Roider, Johann (2009) Cataracta ossea - Ultrastructural and specimen analysis Annals of Anatomy - Anatomischer Anzeiger, 191 (6). pp. 563-567. DOI 10.1016/j.aanat.2009.08.003.

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Abstract

SummaryBackground Although intraocular osseous metaplasia is a well-known phenomenon, ossification of the lens is a rare phenomenon nowadays.Material and Methods An enucleated phthisical eye showed a rock-hard intraocular particle. Lens status after a trauma 36 years ago had been unclear. Differential diagnosis included an intraocular foreign body or ossification of the lens. X-ray diffraction analysis showed microcrystalline apatite indicating a mineralized structure. Histologic specimens revealed a mineralized lens that underwent secondary osseous metaplasia.Conclusions Due to the small number of cases, the mechanisms and preconditions of osseous metaplasia of the lens are not understood in detail, but injury to the lens capsule and availability of blood supply are being discussed. Both were present in this case, in which the luxated lens ended up in the ciliary body region. The mechanism resembled enchondral ossification rather than intramembranous ossification, which is seen in osseous metaplasia of other intraocular structures.

Document Type: Article
Keywords: Cataract Cataracta ossea Osseous cataract Heterotopic ossification Penetrating eye trauma
DOI etc.: 10.1016/j.aanat.2009.08.003
ISSN: 0940-9602
Date Deposited: 02 Feb 2012 08:45
Last Modified: 10 Oct 2012 09:51
URI: http://eprints.uni-kiel.de/id/eprint/15793

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