Epithelial corneal cyst / by J. Herbert Claiborne.

  • Claiborne, John Herbert, Jr., 1861-1922.
Date:
[1905]
Catalogue details

Licence: In copyright

Credit: Epithelial corneal cyst / by J. Herbert Claiborne. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    appears to be a cyclitic membrane being drawn forward by an- terior synsechicC. The staphyloma is now seen to be a cavity in the cornea and sclera and as sections were made, the ciliary body was seen to form a portion of the inner wall of the cavity. While, in another part, the inner wall was apparently lacking, the cavity of the staphyloma opening directly into the vitreous chamber. The cavity of one staphyloma which was examined, — the other being reserved for macroscopic demonstration, — is irregularly oval, having various diverticula, so that some sections appear to contain three or more cysts. Microscopic. The anterior wall of the cyst is thin, contains a small patch of pigment, probably from the prolapsed iris, and is in part formed by corneal tissue and in part by scleral tissue, over which the conjunctiva is quite adherent. The lateral walls of the cyst are formed respectively of cornea and sclera, while the pos- terior wall is composed in part of these structures, in part by ciliary body and organized cyclitic membrane, and part by irregu- lar spaces which open directly into the vitreous chamber. The cyst is lined on its posterior surface with epithelium, similar to the corneal epithelium, consisting of a cylindrical layer of cells on which are several layers of irregularly-shaped cells, and these in turn, are covered by a layer of flat cells. The intermediate layers decrease in number toward the sides of the cyst, and grad- ually diminish until only one layer is left, the layer of flat cells which Hues nearly the whole anterior surface of the cyst. The various diverticula, which appear like separate cysts in different section are observed to be similarly lined. What was taken for the anterior chamber is really the posterior chamber, as the atro- phied iris lies against and is adherent to the posterior surface of the cornea. What appeared to be the iris, are the extended ciliary processes drawn toward the opposite side by the suspensory Hga- ment which is still adherent to the lens capsule. A small portion of the lens is still present contained in a mass composed of the iris, ciliary body, and cyclitic membrane. Anatomical Diagnosis. Implantation epithelial cyst of the cornea and sclera. Edward B. Coburn, M.D,