Epithelial inclusion cysts result when corneal or conjunctival epithelial cells are introduced into the eye from penetrating trauma or surgery. In contrast to the sheet-like growth pattern of epithelial downgrowth, these cysts occur when the cells conform to a more localized, cystic shape. This patient underwent an ExPress glaucoma shunt placement (visible superiorly) and later developed this rapidly expanding epithelial inclusion cyst inferiorly.
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