Epithelial implantation cyst of the cornea / by E. Treacher Collins.

  • Collins, E. Treacher (Edward Treacher), 1862-1937.
Date:
[1892]
Catalogue details

Licence: Public Domain Mark

Credit: Epithelial implantation cyst of the cornea / by E. Treacher Collins. 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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    formed the posterior wall of the cyst, also to the periphery of the cornea, blocking the angle of the anterior chamber. The lens was much flattened from before backwards. The vitreous was someAvhat thin; the retina in situ and the optic disc deeply cupped. Microscopical examination shows the cyst to be lined by epithelial cells, several layers thick, those towards its interior being the most flattened Fig. 2. Microscopical section showing laminated epithelium lining cyst. and scaly. Here and there cells are seen swollen with large globules in them, as though undergoing mucoid de- generation. There is laminated fibrous tissue in front of the cyst and behind it. There is a gap in Descemet's mem- brane on the posterior surface of the cornea in the region of the cyst. Here the iris is adherent, and has in its sub- stance a second smaller cyst, also lined by laminated epi- thelium, which is thicker than that in the corneal cyst, and exactly resembles the surface epithelium of the cornea. Masse* conclusively proved by experimentingon rabbits' eyes that when pieces of epithelium are implanted into the anterior chamber or into the iris, they will grow and give rise to cysts. Most of the iris cysts which follow * Kyatees, ' Tumeurs perl^es et Tumours dermoides de I'Iris,' Paris, 1885.